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

   1
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  */
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/device.h>
  26 #include <linux/sysdev.h>
  27 #include <linux/fs.h>
  28 #include <linux/types.h>
  29 #include <linux/string.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/inetdevice.h>
  32 #include <linux/in.h>
  33 #include <linux/sysfs.h>
  34 #include <linux/ctype.h>
  35 #include <linux/inet.h>
  36 #include <linux/rtnetlink.h>
  37 #include <net/net_namespace.h>
  38
  39 /* #define BONDING_DEBUG 1 */
  40 #include "bonding.h"
  41 #define to_dev(obj)     container_of(obj,struct device,kobj)
  42 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  43
  44 /*---------------------------- Declarations -------------------------------*/
  45
  46
  47 extern struct list_head bond_dev_list;
  48 extern struct bond_params bonding_defaults;
  49 extern struct bond_parm_tbl bond_mode_tbl[];
  50 extern struct bond_parm_tbl bond_lacp_tbl[];
  51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  52 extern struct bond_parm_tbl arp_validate_tbl[];
  53
  54 static int expected_refcount = -1;
  55 static struct class *netdev_class;
  56 /*--------------------------- Data Structures -----------------------------*/
  57
  58 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
  59  * Because kobject_register tries to acquire the subsystem lock.  If
  60  * we already hold the lock (which we would if the user was creating
  61  * a new bond through the sysfs interface), we deadlock.
  62  * This lock is only needed when deleting a bond - we need to make sure
  63  * that we don't collide with an ongoing ioctl.
  64  */
  65
  66 struct rw_semaphore bonding_rwsem;
  67
  68
  69
  70
  71 /*------------------------------ Functions --------------------------------*/
  72
  73 /*
  74  * "show" function for the bond_masters attribute.
  75  * The class parameter is ignored.
  76  */
  77 static ssize_t bonding_show_bonds(struct class *cls, char *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
 115         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 116         ifname = command + 1;
 117         if ((strlen(command) <= 1) ||
 118             !dev_valid_name(ifname))
 119                 goto err_no_cmd;
 120
 121         if (command[0] == '+') {
 122                 printk(KERN_INFO DRV_NAME
 123                         ": %s is being created...\n", ifname);
 124                 rv = bond_create(ifname, &bonding_defaults);
 125                 if (rv) {
 126                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
 127                         res = rv;
 128                 }
 129                 goto out;
 130         }
 131
 132         if (command[0] == '-') {
 133                 rtnl_lock();
 134                 down_write(&bonding_rwsem);
 135
 136                 list_for_each_entry(bond, &bond_dev_list, bond_list)
 137                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 138                                 /* check the ref count on the bond's kobject.
 139                                  * If it's > expected, then there's a file open,
 140                                  * and we have to fail.
 141                                  */
 142                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 143                                                         > expected_refcount){
 144                                         printk(KERN_INFO DRV_NAME
 145                                                 ": Unable remove bond %s due to open references.\n",
 146                                                 ifname);
 147                                         res = -EPERM;
 148                                         goto out_unlock;
 149                                 }
 150                                 printk(KERN_INFO DRV_NAME
 151                                         ": %s is being deleted...\n",
 152                                         bond->dev->name);
 153                                 bond_destroy(bond);
 154                                 goto out_unlock;
 155                         }
 156
 157                 printk(KERN_ERR DRV_NAME
 158                         ": unable to delete non-existent bond %s\n", ifname);
 159                 res = -ENODEV;
 160                 goto out_unlock;
 161         }
 162
 163 err_no_cmd:
 164         printk(KERN_ERR DRV_NAME
 165                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 166         return -EPERM;
 167
 168 out_unlock:
 169         up_write(&bonding_rwsem);
 170         rtnl_unlock();
 171
 172         /* Always return either count or an error.  If you return 0, you'll
 173          * get called forever, which is bad.
 174          */
 175 out:
 176         return res;
 177 }
 178 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 179 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 180                   bonding_show_bonds, bonding_store_bonds);
 181
 182 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 183 {
 184         char linkname[IFNAMSIZ+7];
 185         int ret = 0;
 186
 187         /* first, create a link from the slave back to the master */
 188         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 189                                 "master");
 190         if (ret)
 191                 return ret;
 192         /* next, create a link from the master to the slave */
 193         sprintf(linkname,"slave_%s",slave->name);
 194         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 195                                 linkname);
 196         return ret;
 197
 198 }
 199
 200 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 201 {
 202         char linkname[IFNAMSIZ+7];
 203
 204         sysfs_remove_link(&(slave->dev.kobj), "master");
 205         sprintf(linkname,"slave_%s",slave->name);
 206         sysfs_remove_link(&(master->dev.kobj), linkname);
 207 }
 208
 209
 210 /*
 211  * Show the slaves in the current bond.
 212  */
 213 static ssize_t bonding_show_slaves(struct device *d,
 214                                    struct device_attribute *attr, char *buf)
 215 {
 216         struct slave *slave;
 217         int i, res = 0;
 218         struct bonding *bond = to_bond(d);
 219
 220         read_lock(&bond->lock);
 221         bond_for_each_slave(bond, slave, i) {
 222                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 223                         /* not enough space for another interface name */
 224                         if ((PAGE_SIZE - res) > 10)
 225                                 res = PAGE_SIZE - 10;
 226                         res += sprintf(buf + res, "++more++ ");
 227                         break;
 228                 }
 229                 res += sprintf(buf + res, "%s ", slave->dev->name);
 230         }
 231         read_unlock(&bond->lock);
 232         if (res)
 233                 buf[res-1] = '\n'; /* eat the leftover space */
 234         return res;
 235 }
 236
 237 /*
 238  * Set the slaves in the current bond.  The bond interface must be
 239  * up for this to succeed.
 240  * This function is largely the same flow as bonding_update_bonds().
 241  */
 242 static ssize_t bonding_store_slaves(struct device *d,
 243                                     struct device_attribute *attr,
 244                                     const char *buffer, size_t count)
 245 {
 246         char command[IFNAMSIZ + 1] = { 0, };
 247         char *ifname;
 248         int i, res, found, ret = count;
 249         u32 original_mtu;
 250         struct slave *slave;
 251         struct net_device *dev = NULL;
 252         struct bonding *bond = to_bond(d);
 253
 254         /* Quick sanity check -- is the bond interface up? */
 255         if (!(bond->dev->flags & IFF_UP)) {
 256                 printk(KERN_WARNING DRV_NAME
 257                        ": %s: doing slave updates when interface is down.\n",
 258                        bond->dev->name);
 259         }
 260
 261         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 262
 263         rtnl_lock();
 264         down_write(&(bonding_rwsem));
 265
 266         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 267         ifname = command + 1;
 268         if ((strlen(command) <= 1) ||
 269             !dev_valid_name(ifname))
 270                 goto err_no_cmd;
 271
 272         if (command[0] == '+') {
 273
 274                 /* Got a slave name in ifname.  Is it already in the list? */
 275                 found = 0;
 276                 read_lock(&bond->lock);
 277                 bond_for_each_slave(bond, slave, i)
 278                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 279                                 printk(KERN_ERR DRV_NAME
 280                                        ": %s: Interface %s is already enslaved!\n",
 281                                        bond->dev->name, ifname);
 282                                 ret = -EPERM;
 283                                 read_unlock(&bond->lock);
 284                                 goto out;
 285                         }
 286
 287                 read_unlock(&bond->lock);
 288                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 289                        bond->dev->name, ifname);
 290                 dev = dev_get_by_name(&init_net, ifname);
 291                 if (!dev) {
 292                         printk(KERN_INFO DRV_NAME
 293                                ": %s: Interface %s does not exist!\n",
 294                                bond->dev->name, ifname);
 295                         ret = -EPERM;
 296                         goto out;
 297                 }
 298                 else
 299                         dev_put(dev);
 300
 301                 if (dev->flags & IFF_UP) {
 302                         printk(KERN_ERR DRV_NAME
 303                                ": %s: Error: Unable to enslave %s "
 304                                "because it is already up.\n",
 305                                bond->dev->name, dev->name);
 306                         ret = -EPERM;
 307                         goto out;
 308                 }
 309                 /* If this is the first slave, then we need to set
 310                    the master's hardware address to be the same as the
 311                    slave's. */
 312                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 313                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 314                                dev->addr_len);
 315                 }
 316
 317                 /* Set the slave's MTU to match the bond */
 318                 original_mtu = dev->mtu;
 319                 if (dev->mtu != bond->dev->mtu) {
 320                         if (dev->change_mtu) {
 321                                 res = dev->change_mtu(dev,
 322                                                       bond->dev->mtu);
 323                                 if (res) {
 324                                         ret = res;
 325                                         goto out;
 326                                 }
 327                         } else {
 328                                 dev->mtu = bond->dev->mtu;
 329                         }
 330                 }
 331                 res = bond_enslave(bond->dev, dev);
 332                 bond_for_each_slave(bond, slave, i)
 333                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 334                                 slave->original_mtu = original_mtu;
 335                 if (res) {
 336                         ret = res;
 337                 }
 338                 goto out;
 339         }
 340
 341         if (command[0] == '-') {
 342                 dev = NULL;
 343                 original_mtu = 0;
 344                 bond_for_each_slave(bond, slave, i)
 345                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 346                                 dev = slave->dev;
 347                                 original_mtu = slave->original_mtu;
 348                                 break;
 349                         }
 350                 if (dev) {
 351                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 352                                 bond->dev->name, dev->name);
 353                         if (bond->setup_by_slave)
 354                                 res = bond_release_and_destroy(bond->dev, dev);
 355                         else
 356                                 res = bond_release(bond->dev, dev);
 357                         if (res) {
 358                                 ret = res;
 359                                 goto out;
 360                         }
 361                         /* set the slave MTU to the default */
 362                         if (dev->change_mtu) {
 363                                 dev->change_mtu(dev, original_mtu);
 364                         } else {
 365                                 dev->mtu = original_mtu;
 366                         }
 367                 }
 368                 else {
 369                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 370                                 ifname, bond->dev->name);
 371                         ret = -ENODEV;
 372                 }
 373                 goto out;
 374         }
 375
 376 err_no_cmd:
 377         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 378         ret = -EPERM;
 379
 380 out:
 381         up_write(&(bonding_rwsem));
 382         rtnl_unlock();
 383         return ret;
 384 }
 385
 386 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 387
 388 /*
 389  * Show and set the bonding mode.  The bond interface must be down to
 390  * change the mode.
 391  */
 392 static ssize_t bonding_show_mode(struct device *d,
 393                                  struct device_attribute *attr, char *buf)
 394 {
 395         struct bonding *bond = to_bond(d);
 396
 397         return sprintf(buf, "%s %d\n",
 398                         bond_mode_tbl[bond->params.mode].modename,
 399                         bond->params.mode);
 400 }
 401
 402 static ssize_t bonding_store_mode(struct device *d,
 403                                   struct device_attribute *attr,
 404                                   const char *buf, size_t count)
 405 {
 406         int new_value, ret = count;
 407         struct bonding *bond = to_bond(d);
 408
 409         if (bond->dev->flags & IFF_UP) {
 410                 printk(KERN_ERR DRV_NAME
 411                        ": unable to update mode of %s because interface is up.\n",
 412                        bond->dev->name);
 413                 ret = -EPERM;
 414                 goto out;
 415         }
 416
 417         new_value = bond_parse_parm(buf, bond_mode_tbl);
 418         if (new_value < 0)  {
 419                 printk(KERN_ERR DRV_NAME
 420                        ": %s: Ignoring invalid mode value %.*s.\n",
 421                        bond->dev->name,
 422                        (int)strlen(buf) - 1, buf);
 423                 ret = -EINVAL;
 424                 goto out;
 425         } else {
 426                 if (bond->params.mode == BOND_MODE_8023AD)
 427                         bond_unset_master_3ad_flags(bond);
 428
 429                 if (bond->params.mode == BOND_MODE_ALB)
 430                         bond_unset_master_alb_flags(bond);
 431
 432                 bond->params.mode = new_value;
 433                 bond_set_mode_ops(bond, bond->params.mode);
 434                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 435                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 436         }
 437 out:
 438         return ret;
 439 }
 440 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 441
 442 /*
 443  * Show and set the bonding transmit hash method.  The bond interface must be down to
 444  * change the xmit hash policy.
 445  */
 446 static ssize_t bonding_show_xmit_hash(struct device *d,
 447                                       struct device_attribute *attr,
 448                                       char *buf)
 449 {
 450         struct bonding *bond = to_bond(d);
 451
 452         return sprintf(buf, "%s %d\n",
 453                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 454                        bond->params.xmit_policy);
 455 }
 456
 457 static ssize_t bonding_store_xmit_hash(struct device *d,
 458                                        struct device_attribute *attr,
 459                                        const char *buf, size_t count)
 460 {
 461         int new_value, ret = count;
 462         struct bonding *bond = to_bond(d);
 463
 464         if (bond->dev->flags & IFF_UP) {
 465                 printk(KERN_ERR DRV_NAME
 466                        "%s: Interface is up. Unable to update xmit policy.\n",
 467                        bond->dev->name);
 468                 ret = -EPERM;
 469                 goto out;
 470         }
 471
 472         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 473         if (new_value < 0)  {
 474                 printk(KERN_ERR DRV_NAME
 475                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 476                        bond->dev->name,
 477                        (int)strlen(buf) - 1, buf);
 478                 ret = -EINVAL;
 479                 goto out;
 480         } else {
 481                 bond->params.xmit_policy = new_value;
 482                 bond_set_mode_ops(bond, bond->params.mode);
 483                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 484                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 485         }
 486 out:
 487         return ret;
 488 }
 489 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 490
 491 /*
 492  * Show and set arp_validate.
 493  */
 494 static ssize_t bonding_show_arp_validate(struct device *d,
 495                                          struct device_attribute *attr,
 496                                          char *buf)
 497 {
 498         struct bonding *bond = to_bond(d);
 499
 500         return sprintf(buf, "%s %d\n",
 501                        arp_validate_tbl[bond->params.arp_validate].modename,
 502                        bond->params.arp_validate);
 503 }
 504
 505 static ssize_t bonding_store_arp_validate(struct device *d,
 506                                           struct device_attribute *attr,
 507                                           const char *buf, size_t count)
 508 {
 509         int new_value;
 510         struct bonding *bond = to_bond(d);
 511
 512         new_value = bond_parse_parm(buf, arp_validate_tbl);
 513         if (new_value < 0) {
 514                 printk(KERN_ERR DRV_NAME
 515                        ": %s: Ignoring invalid arp_validate value %s\n",
 516                        bond->dev->name, buf);
 517                 return -EINVAL;
 518         }
 519         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 520                 printk(KERN_ERR DRV_NAME
 521                        ": %s: arp_validate only supported in active-backup mode.\n",
 522                        bond->dev->name);
 523                 return -EINVAL;
 524         }
 525         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 526                bond->dev->name, arp_validate_tbl[new_value].modename,
 527                new_value);
 528
 529         if (!bond->params.arp_validate && new_value) {
 530                 bond_register_arp(bond);
 531         } else if (bond->params.arp_validate && !new_value) {
 532                 bond_unregister_arp(bond);
 533         }
 534
 535         bond->params.arp_validate = new_value;
 536
 537         return count;
 538 }
 539
 540 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 541
 542 /*
 543  * Show and store fail_over_mac.  User only allowed to change the
 544  * value when there are no slaves.
 545  */
 546 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 547 {
 548         struct bonding *bond = to_bond(d);
 549
 550         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
 551 }
 552
 553 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 554 {
 555         int new_value;
 556         int ret = count;
 557         struct bonding *bond = to_bond(d);
 558
 559         if (bond->slave_cnt != 0) {
 560                 printk(KERN_ERR DRV_NAME
 561                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 562                        bond->dev->name);
 563                 ret = -EPERM;
 564                 goto out;
 565         }
 566
 567         if (sscanf(buf, "%d", &new_value) != 1) {
 568                 printk(KERN_ERR DRV_NAME
 569                        ": %s: no fail_over_mac value specified.\n",
 570                        bond->dev->name);
 571                 ret = -EINVAL;
 572                 goto out;
 573         }
 574
 575         if ((new_value == 0) || (new_value == 1)) {
 576                 bond->params.fail_over_mac = new_value;
 577                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
 578                        bond->dev->name, new_value);
 579         } else {
 580                 printk(KERN_INFO DRV_NAME
 581                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
 582                        bond->dev->name, new_value);
 583         }
 584 out:
 585         return ret;
 586 }
 587
 588 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 589
 590 /*
 591  * Show and set the arp timer interval.  There are two tricky bits
 592  * here.  First, if ARP monitoring is activated, then we must disable
 593  * MII monitoring.  Second, if the ARP timer isn't running, we must
 594  * start it.
 595  */
 596 static ssize_t bonding_show_arp_interval(struct device *d,
 597                                          struct device_attribute *attr,
 598                                          char *buf)
 599 {
 600         struct bonding *bond = to_bond(d);
 601
 602         return sprintf(buf, "%d\n", bond->params.arp_interval);
 603 }
 604
 605 static ssize_t bonding_store_arp_interval(struct device *d,
 606                                           struct device_attribute *attr,
 607                                           const char *buf, size_t count)
 608 {
 609         int new_value, ret = count;
 610         struct bonding *bond = to_bond(d);
 611
 612         if (sscanf(buf, "%d", &new_value) != 1) {
 613                 printk(KERN_ERR DRV_NAME
 614                        ": %s: no arp_interval value specified.\n",
 615                        bond->dev->name);
 616                 ret = -EINVAL;
 617                 goto out;
 618         }
 619         if (new_value < 0) {
 620                 printk(KERN_ERR DRV_NAME
 621                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 622                        bond->dev->name, new_value, INT_MAX);
 623                 ret = -EINVAL;
 624                 goto out;
 625         }
 626
 627         printk(KERN_INFO DRV_NAME
 628                ": %s: Setting ARP monitoring interval to %d.\n",
 629                bond->dev->name, new_value);
 630         bond->params.arp_interval = new_value;
 631         if (bond->params.miimon) {
 632                 printk(KERN_INFO DRV_NAME
 633                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 634                        "%s Disabling MII monitoring.\n",
 635                        bond->dev->name, bond->dev->name);
 636                 bond->params.miimon = 0;
 637                 if (delayed_work_pending(&bond->mii_work)) {
 638                         cancel_delayed_work(&bond->mii_work);
 639                         flush_workqueue(bond->wq);
 640                 }
 641         }
 642         if (!bond->params.arp_targets[0]) {
 643                 printk(KERN_INFO DRV_NAME
 644                        ": %s: ARP monitoring has been set up, "
 645                        "but no ARP targets have been specified.\n",
 646                        bond->dev->name);
 647         }
 648         if (bond->dev->flags & IFF_UP) {
 649                 /* If the interface is up, we may need to fire off
 650                  * the ARP timer.  If the interface is down, the
 651                  * timer will get fired off when the open function
 652                  * is called.
 653                  */
 654                 if (!delayed_work_pending(&bond->arp_work)) {
 655                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 656                                 INIT_DELAYED_WORK(&bond->arp_work,
 657                                                   bond_activebackup_arp_mon);
 658                         else
 659                                 INIT_DELAYED_WORK(&bond->arp_work,
 660                                                   bond_loadbalance_arp_mon);
 661
 662                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 663                 }
 664         }
 665
 666 out:
 667         return ret;
 668 }
 669 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 670
 671 /*
 672  * Show and set the arp targets.
 673  */
 674 static ssize_t bonding_show_arp_targets(struct device *d,
 675                                         struct device_attribute *attr,
 676                                         char *buf)
 677 {
 678         int i, res = 0;
 679         struct bonding *bond = to_bond(d);
 680
 681         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 682                 if (bond->params.arp_targets[i])
 683                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 684                                NIPQUAD(bond->params.arp_targets[i]));
 685         }
 686         if (res)
 687                 buf[res-1] = '\n'; /* eat the leftover space */
 688         return res;
 689 }
 690
 691 static ssize_t bonding_store_arp_targets(struct device *d,
 692                                          struct device_attribute *attr,
 693                                          const char *buf, size_t count)
 694 {
 695         __be32 newtarget;
 696         int i = 0, done = 0, ret = count;
 697         struct bonding *bond = to_bond(d);
 698         __be32 *targets;
 699
 700         targets = bond->params.arp_targets;
 701         newtarget = in_aton(buf + 1);
 702         /* look for adds */
 703         if (buf[0] == '+') {
 704                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 705                         printk(KERN_ERR DRV_NAME
 706                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 707                                bond->dev->name, NIPQUAD(newtarget));
 708                         ret = -EINVAL;
 709                         goto out;
 710                 }
 711                 /* look for an empty slot to put the target in, and check for dupes */
 712                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 713                         if (targets[i] == newtarget) { /* duplicate */
 714                                 printk(KERN_ERR DRV_NAME
 715                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 716                                        bond->dev->name, NIPQUAD(newtarget));
 717                                 if (done)
 718                                         targets[i] = 0;
 719                                 ret = -EINVAL;
 720                                 goto out;
 721                         }
 722                         if (targets[i] == 0 && !done) {
 723                                 printk(KERN_INFO DRV_NAME
 724                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 725                                        bond->dev->name, NIPQUAD(newtarget));
 726                                 done = 1;
 727                                 targets[i] = newtarget;
 728                         }
 729                 }
 730                 if (!done) {
 731                         printk(KERN_ERR DRV_NAME
 732                                ": %s: ARP target table is full!\n",
 733                                bond->dev->name);
 734                         ret = -EINVAL;
 735                         goto out;
 736                 }
 737
 738         }
 739         else if (buf[0] == '-') {
 740                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 741                         printk(KERN_ERR DRV_NAME
 742                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 743                                bond->dev->name, NIPQUAD(newtarget));
 744                         ret = -EINVAL;
 745                         goto out;
 746                 }
 747
 748                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 749                         if (targets[i] == newtarget) {
 750                                 printk(KERN_INFO DRV_NAME
 751                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 752                                        bond->dev->name, NIPQUAD(newtarget));
 753                                 targets[i] = 0;
 754                                 done = 1;
 755                         }
 756                 }
 757                 if (!done) {
 758                         printk(KERN_INFO DRV_NAME
 759                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 760                                bond->dev->name, NIPQUAD(newtarget));
 761                         ret = -EINVAL;
 762                         goto out;
 763                 }
 764         }
 765         else {
 766                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 767                         bond->dev->name);
 768                 ret = -EPERM;
 769                 goto out;
 770         }
 771
 772 out:
 773         return ret;
 774 }
 775 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 776
 777 /*
 778  * Show and set the up and down delays.  These must be multiples of the
 779  * MII monitoring value, and are stored internally as the multiplier.
 780  * Thus, we must translate to MS for the real world.
 781  */
 782 static ssize_t bonding_show_downdelay(struct device *d,
 783                                       struct device_attribute *attr,
 784                                       char *buf)
 785 {
 786         struct bonding *bond = to_bond(d);
 787
 788         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 789 }
 790
 791 static ssize_t bonding_store_downdelay(struct device *d,
 792                                        struct device_attribute *attr,
 793                                        const char *buf, size_t count)
 794 {
 795         int new_value, ret = count;
 796         struct bonding *bond = to_bond(d);
 797
 798         if (!(bond->params.miimon)) {
 799                 printk(KERN_ERR DRV_NAME
 800                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 801                        bond->dev->name);
 802                 ret = -EPERM;
 803                 goto out;
 804         }
 805
 806         if (sscanf(buf, "%d", &new_value) != 1) {
 807                 printk(KERN_ERR DRV_NAME
 808                        ": %s: no down delay value specified.\n",
 809                        bond->dev->name);
 810                 ret = -EINVAL;
 811                 goto out;
 812         }
 813         if (new_value < 0) {
 814                 printk(KERN_ERR DRV_NAME
 815                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 816                        bond->dev->name, new_value, 1, INT_MAX);
 817                 ret = -EINVAL;
 818                 goto out;
 819         } else {
 820                 if ((new_value % bond->params.miimon) != 0) {
 821                         printk(KERN_WARNING DRV_NAME
 822                                ": %s: Warning: down delay (%d) is not a multiple "
 823                                "of miimon (%d), delay rounded to %d ms\n",
 824                                bond->dev->name, new_value, bond->params.miimon,
 825                                (new_value / bond->params.miimon) *
 826                                bond->params.miimon);
 827                 }
 828                 bond->params.downdelay = new_value / bond->params.miimon;
 829                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 830                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 831
 832         }
 833
 834 out:
 835         return ret;
 836 }
 837 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 838
 839 static ssize_t bonding_show_updelay(struct device *d,
 840                                     struct device_attribute *attr,
 841                                     char *buf)
 842 {
 843         struct bonding *bond = to_bond(d);
 844
 845         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 846
 847 }
 848
 849 static ssize_t bonding_store_updelay(struct device *d,
 850                                      struct device_attribute *attr,
 851                                      const char *buf, size_t count)
 852 {
 853         int new_value, ret = count;
 854         struct bonding *bond = to_bond(d);
 855
 856         if (!(bond->params.miimon)) {
 857                 printk(KERN_ERR DRV_NAME
 858                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 859                        bond->dev->name);
 860                 ret = -EPERM;
 861                 goto out;
 862         }
 863
 864         if (sscanf(buf, "%d", &new_value) != 1) {
 865                 printk(KERN_ERR DRV_NAME
 866                        ": %s: no up delay value specified.\n",
 867                        bond->dev->name);
 868                 ret = -EINVAL;
 869                 goto out;
 870         }
 871         if (new_value < 0) {
 872                 printk(KERN_ERR DRV_NAME
 873                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 874                        bond->dev->name, new_value, 1, INT_MAX);
 875                 ret = -EINVAL;
 876                 goto out;
 877         } else {
 878                 if ((new_value % bond->params.miimon) != 0) {
 879                         printk(KERN_WARNING DRV_NAME
 880                                ": %s: Warning: up delay (%d) is not a multiple "
 881                                "of miimon (%d), updelay rounded to %d ms\n",
 882                                bond->dev->name, new_value, bond->params.miimon,
 883                                (new_value / bond->params.miimon) *
 884                                bond->params.miimon);
 885                 }
 886                 bond->params.updelay = new_value / bond->params.miimon;
 887                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 888                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 889
 890         }
 891
 892 out:
 893         return ret;
 894 }
 895 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 896
 897 /*
 898  * Show and set the LACP interval.  Interface must be down, and the mode
 899  * must be set to 802.3ad mode.
 900  */
 901 static ssize_t bonding_show_lacp(struct device *d,
 902                                  struct device_attribute *attr,
 903                                  char *buf)
 904 {
 905         struct bonding *bond = to_bond(d);
 906
 907         return sprintf(buf, "%s %d\n",
 908                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 909                 bond->params.lacp_fast);
 910 }
 911
 912 static ssize_t bonding_store_lacp(struct device *d,
 913                                   struct device_attribute *attr,
 914                                   const char *buf, size_t count)
 915 {
 916         int new_value, ret = count;
 917         struct bonding *bond = to_bond(d);
 918
 919         if (bond->dev->flags & IFF_UP) {
 920                 printk(KERN_ERR DRV_NAME
 921                        ": %s: Unable to update LACP rate because interface is up.\n",
 922                        bond->dev->name);
 923                 ret = -EPERM;
 924                 goto out;
 925         }
 926
 927         if (bond->params.mode != BOND_MODE_8023AD) {
 928                 printk(KERN_ERR DRV_NAME
 929                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 930                        bond->dev->name);
 931                 ret = -EPERM;
 932                 goto out;
 933         }
 934
 935         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 936
 937         if ((new_value == 1) || (new_value == 0)) {
 938                 bond->params.lacp_fast = new_value;
 939                 printk(KERN_INFO DRV_NAME
 940                        ": %s: Setting LACP rate to %s (%d).\n",
 941                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 942         } else {
 943                 printk(KERN_ERR DRV_NAME
 944                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 945                         bond->dev->name, (int)strlen(buf) - 1, buf);
 946                 ret = -EINVAL;
 947         }
 948 out:
 949         return ret;
 950 }
 951 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 952
 953 /*
 954  * Show and set the number of grat ARP to send after a failover event.
 955  */
 956 static ssize_t bonding_show_n_grat_arp(struct device *d,
 957                                    struct device_attribute *attr,
 958                                    char *buf)
 959 {
 960         struct bonding *bond = to_bond(d);
 961
 962         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
 963 }
 964
 965 static ssize_t bonding_store_n_grat_arp(struct device *d,
 966                                     struct device_attribute *attr,
 967                                     const char *buf, size_t count)
 968 {
 969         int new_value, ret = count;
 970         struct bonding *bond = to_bond(d);
 971
 972         if (sscanf(buf, "%d", &new_value) != 1) {
 973                 printk(KERN_ERR DRV_NAME
 974                        ": %s: no num_grat_arp value specified.\n",
 975                        bond->dev->name);
 976                 ret = -EINVAL;
 977                 goto out;
 978         }
 979         if (new_value < 0 || new_value > 255) {
 980                 printk(KERN_ERR DRV_NAME
 981                        ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
 982                        bond->dev->name, new_value);
 983                 ret = -EINVAL;
 984                 goto out;
 985         } else {
 986                 bond->params.num_grat_arp = new_value;
 987         }
 988 out:
 989         return ret;
 990 }
 991 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
 992 /*
 993  * Show and set the MII monitor interval.  There are two tricky bits
 994  * here.  First, if MII monitoring is activated, then we must disable
 995  * ARP monitoring.  Second, if the timer isn't running, we must
 996  * start it.
 997  */
 998 static ssize_t bonding_show_miimon(struct device *d,
 999                                    struct device_attribute *attr,
1000                                    char *buf)
1001 {
1002         struct bonding *bond = to_bond(d);
1003
1004         return sprintf(buf, "%d\n", bond->params.miimon);
1005 }
1006
1007 static ssize_t bonding_store_miimon(struct device *d,
1008                                     struct device_attribute *attr,
1009                                     const char *buf, size_t count)
1010 {
1011         int new_value, ret = count;
1012         struct bonding *bond = to_bond(d);
1013
1014         if (sscanf(buf, "%d", &new_value) != 1) {
1015                 printk(KERN_ERR DRV_NAME
1016                        ": %s: no miimon value specified.\n",
1017                        bond->dev->name);
1018                 ret = -EINVAL;
1019                 goto out;
1020         }
1021         if (new_value < 0) {
1022                 printk(KERN_ERR DRV_NAME
1023                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1024                        bond->dev->name, new_value, 1, INT_MAX);
1025                 ret = -EINVAL;
1026                 goto out;
1027         } else {
1028                 printk(KERN_INFO DRV_NAME
1029                        ": %s: Setting MII monitoring interval to %d.\n",
1030                        bond->dev->name, new_value);
1031                 bond->params.miimon = new_value;
1032                 if(bond->params.updelay)
1033                         printk(KERN_INFO DRV_NAME
1034                               ": %s: Note: Updating updelay (to %d) "
1035                               "since it is a multiple of the miimon value.\n",
1036                               bond->dev->name,
1037                               bond->params.updelay * bond->params.miimon);
1038                 if(bond->params.downdelay)
1039                         printk(KERN_INFO DRV_NAME
1040                               ": %s: Note: Updating downdelay (to %d) "
1041                               "since it is a multiple of the miimon value.\n",
1042                               bond->dev->name,
1043                               bond->params.downdelay * bond->params.miimon);
1044                 if (bond->params.arp_interval) {
1045                         printk(KERN_INFO DRV_NAME
1046                                ": %s: MII monitoring cannot be used with "
1047                                "ARP monitoring. Disabling ARP monitoring...\n",
1048                                bond->dev->name);
1049                         bond->params.arp_interval = 0;
1050                         if (bond->params.arp_validate) {
1051                                 bond_unregister_arp(bond);
1052                                 bond->params.arp_validate =
1053                                         BOND_ARP_VALIDATE_NONE;
1054                         }
1055                         if (delayed_work_pending(&bond->arp_work)) {
1056                                 cancel_delayed_work(&bond->arp_work);
1057                                 flush_workqueue(bond->wq);
1058                         }
1059                 }
1060
1061                 if (bond->dev->flags & IFF_UP) {
1062                         /* If the interface is up, we may need to fire off
1063                          * the MII timer. If the interface is down, the
1064                          * timer will get fired off when the open function
1065                          * is called.
1066                          */
1067                         if (!delayed_work_pending(&bond->mii_work)) {
1068                                 INIT_DELAYED_WORK(&bond->mii_work,
1069                                                   bond_mii_monitor);
1070                                 queue_delayed_work(bond->wq,
1071                                                    &bond->mii_work, 0);
1072                         }
1073                 }
1074         }
1075 out:
1076         return ret;
1077 }
1078 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1079
1080 /*
1081  * Show and set the primary slave.  The store function is much
1082  * simpler than bonding_store_slaves function because it only needs to
1083  * handle one interface name.
1084  * The bond must be a mode that supports a primary for this be
1085  * set.
1086  */
1087 static ssize_t bonding_show_primary(struct device *d,
1088                                     struct device_attribute *attr,
1089                                     char *buf)
1090 {
1091         int count = 0;
1092         struct bonding *bond = to_bond(d);
1093
1094         if (bond->primary_slave)
1095                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1096
1097         return count;
1098 }
1099
1100 static ssize_t bonding_store_primary(struct device *d,
1101                                      struct device_attribute *attr,
1102                                      const char *buf, size_t count)
1103 {
1104         int i;
1105         struct slave *slave;
1106         struct bonding *bond = to_bond(d);
1107
1108         rtnl_lock();
1109         read_lock(&bond->lock);
1110         write_lock_bh(&bond->curr_slave_lock);
1111
1112         if (!USES_PRIMARY(bond->params.mode)) {
1113                 printk(KERN_INFO DRV_NAME
1114                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1115                        bond->dev->name, bond->dev->name, bond->params.mode);
1116         } else {
1117                 bond_for_each_slave(bond, slave, i) {
1118                         if (strnicmp
1119                             (slave->dev->name, buf,
1120                              strlen(slave->dev->name)) == 0) {
1121                                 printk(KERN_INFO DRV_NAME
1122                                        ": %s: Setting %s as primary slave.\n",
1123                                        bond->dev->name, slave->dev->name);
1124                                 bond->primary_slave = slave;
1125                                 bond_select_active_slave(bond);
1126                                 goto out;
1127                         }
1128                 }
1129
1130                 /* if we got here, then we didn't match the name of any slave */
1131
1132                 if (strlen(buf) == 0 || buf[0] == '\n') {
1133                         printk(KERN_INFO DRV_NAME
1134                                ": %s: Setting primary slave to None.\n",
1135                                bond->dev->name);
1136                         bond->primary_slave = NULL;
1137                                 bond_select_active_slave(bond);
1138                 } else {
1139                         printk(KERN_INFO DRV_NAME
1140                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1141                                bond->dev->name, (int)strlen(buf) - 1, buf);
1142                 }
1143         }
1144 out:
1145         write_unlock_bh(&bond->curr_slave_lock);
1146         read_unlock(&bond->lock);
1147         rtnl_unlock();
1148
1149         return count;
1150 }
1151 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1152
1153 /*
1154  * Show and set the use_carrier flag.
1155  */
1156 static ssize_t bonding_show_carrier(struct device *d,
1157                                     struct device_attribute *attr,
1158                                     char *buf)
1159 {
1160         struct bonding *bond = to_bond(d);
1161
1162         return sprintf(buf, "%d\n", bond->params.use_carrier);
1163 }
1164
1165 static ssize_t bonding_store_carrier(struct device *d,
1166                                      struct device_attribute *attr,
1167                                      const char *buf, size_t count)
1168 {
1169         int new_value, ret = count;
1170         struct bonding *bond = to_bond(d);
1171
1172
1173         if (sscanf(buf, "%d", &new_value) != 1) {
1174                 printk(KERN_ERR DRV_NAME
1175                        ": %s: no use_carrier value specified.\n",
1176                        bond->dev->name);
1177                 ret = -EINVAL;
1178                 goto out;
1179         }
1180         if ((new_value == 0) || (new_value == 1)) {
1181                 bond->params.use_carrier = new_value;
1182                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1183                        bond->dev->name, new_value);
1184         } else {
1185                 printk(KERN_INFO DRV_NAME
1186                        ": %s: Ignoring invalid use_carrier value %d.\n",
1187                        bond->dev->name, new_value);
1188         }
1189 out:
1190         return count;
1191 }
1192 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1193
1194
1195 /*
1196  * Show and set currently active_slave.
1197  */
1198 static ssize_t bonding_show_active_slave(struct device *d,
1199                                          struct device_attribute *attr,
1200                                          char *buf)
1201 {
1202         struct slave *curr;
1203         struct bonding *bond = to_bond(d);
1204         int count = 0;
1205
1206         read_lock(&bond->curr_slave_lock);
1207         curr = bond->curr_active_slave;
1208         read_unlock(&bond->curr_slave_lock);
1209
1210         if (USES_PRIMARY(bond->params.mode) && curr)
1211                 count = sprintf(buf, "%s\n", curr->dev->name);
1212         return count;
1213 }
1214
1215 static ssize_t bonding_store_active_slave(struct device *d,
1216                                           struct device_attribute *attr,
1217                                           const char *buf, size_t count)
1218 {
1219         int i;
1220         struct slave *slave;
1221         struct slave *old_active = NULL;
1222         struct slave *new_active = NULL;
1223         struct bonding *bond = to_bond(d);
1224
1225         rtnl_lock();
1226         read_lock(&bond->lock);
1227         write_lock_bh(&bond->curr_slave_lock);
1228
1229         if (!USES_PRIMARY(bond->params.mode)) {
1230                 printk(KERN_INFO DRV_NAME
1231                        ": %s: Unable to change active slave; %s is in mode %d\n",
1232                        bond->dev->name, bond->dev->name, bond->params.mode);
1233         } else {
1234                 bond_for_each_slave(bond, slave, i) {
1235                         if (strnicmp
1236                             (slave->dev->name, buf,
1237                              strlen(slave->dev->name)) == 0) {
1238                                 old_active = bond->curr_active_slave;
1239                                 new_active = slave;
1240                                 if (new_active == old_active) {
1241                                         /* do nothing */
1242                                         printk(KERN_INFO DRV_NAME
1243                                                ": %s: %s is already the current active slave.\n",
1244                                                bond->dev->name, slave->dev->name);
1245                                         goto out;
1246                                 }
1247                                 else {
1248                                         if ((new_active) &&
1249                                             (old_active) &&
1250                                             (new_active->link == BOND_LINK_UP) &&
1251                                             IS_UP(new_active->dev)) {
1252                                                 printk(KERN_INFO DRV_NAME
1253                                                       ": %s: Setting %s as active slave.\n",
1254                                                       bond->dev->name, slave->dev->name);
1255                                                 bond_change_active_slave(bond, new_active);
1256                                         }
1257                                         else {
1258                                                 printk(KERN_INFO DRV_NAME
1259                                                       ": %s: Could not set %s as active slave; "
1260                                                       "either %s is down or the link is down.\n",
1261                                                       bond->dev->name, slave->dev->name,
1262                                                       slave->dev->name);
1263                                         }
1264                                         goto out;
1265                                 }
1266                         }
1267                 }
1268
1269                 /* if we got here, then we didn't match the name of any slave */
1270
1271                 if (strlen(buf) == 0 || buf[0] == '\n') {
1272                         printk(KERN_INFO DRV_NAME
1273                                ": %s: Setting active slave to None.\n",
1274                                bond->dev->name);
1275                         bond->primary_slave = NULL;
1276                                 bond_select_active_slave(bond);
1277                 } else {
1278                         printk(KERN_INFO DRV_NAME
1279                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1280                                bond->dev->name, (int)strlen(buf) - 1, buf);
1281                 }
1282         }
1283 out:
1284         write_unlock_bh(&bond->curr_slave_lock);
1285         read_unlock(&bond->lock);
1286         rtnl_unlock();
1287
1288         return count;
1289
1290 }
1291 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1292
1293
1294 /*
1295  * Show link status of the bond interface.
1296  */
1297 static ssize_t bonding_show_mii_status(struct device *d,
1298                                        struct device_attribute *attr,
1299                                        char *buf)
1300 {
1301         struct slave *curr;
1302         struct bonding *bond = to_bond(d);
1303
1304         read_lock(&bond->curr_slave_lock);
1305         curr = bond->curr_active_slave;
1306         read_unlock(&bond->curr_slave_lock);
1307
1308         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1309 }
1310 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1311
1312
1313 /*
1314  * Show current 802.3ad aggregator ID.
1315  */
1316 static ssize_t bonding_show_ad_aggregator(struct device *d,
1317                                           struct device_attribute *attr,
1318                                           char *buf)
1319 {
1320         int count = 0;
1321         struct bonding *bond = to_bond(d);
1322
1323         if (bond->params.mode == BOND_MODE_8023AD) {
1324                 struct ad_info ad_info;
1325                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1326         }
1327
1328         return count;
1329 }
1330 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1331
1332
1333 /*
1334  * Show number of active 802.3ad ports.
1335  */
1336 static ssize_t bonding_show_ad_num_ports(struct device *d,
1337                                          struct device_attribute *attr,
1338                                          char *buf)
1339 {
1340         int count = 0;
1341         struct bonding *bond = to_bond(d);
1342
1343         if (bond->params.mode == BOND_MODE_8023AD) {
1344                 struct ad_info ad_info;
1345                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1346         }
1347
1348         return count;
1349 }
1350 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1351
1352
1353 /*
1354  * Show current 802.3ad actor key.
1355  */
1356 static ssize_t bonding_show_ad_actor_key(struct device *d,
1357                                          struct device_attribute *attr,
1358                                          char *buf)
1359 {
1360         int count = 0;
1361         struct bonding *bond = to_bond(d);
1362
1363         if (bond->params.mode == BOND_MODE_8023AD) {
1364                 struct ad_info ad_info;
1365                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1366         }
1367
1368         return count;
1369 }
1370 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1371
1372
1373 /*
1374  * Show current 802.3ad partner key.
1375  */
1376 static ssize_t bonding_show_ad_partner_key(struct device *d,
1377                                            struct device_attribute *attr,
1378                                            char *buf)
1379 {
1380         int count = 0;
1381         struct bonding *bond = to_bond(d);
1382
1383         if (bond->params.mode == BOND_MODE_8023AD) {
1384                 struct ad_info ad_info;
1385                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1386         }
1387
1388         return count;
1389 }
1390 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1391
1392
1393 /*
1394  * Show current 802.3ad partner mac.
1395  */
1396 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1397                                            struct device_attribute *attr,
1398                                            char *buf)
1399 {
1400         int count = 0;
1401         struct bonding *bond = to_bond(d);
1402         DECLARE_MAC_BUF(mac);
1403
1404         if (bond->params.mode == BOND_MODE_8023AD) {
1405                 struct ad_info ad_info;
1406                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1407                         count = sprintf(buf,"%s\n",
1408                                         print_mac(mac, ad_info.partner_system));
1409                 }
1410         }
1411
1412         return count;
1413 }
1414 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1415
1416
1417
1418 static struct attribute *per_bond_attrs[] = {
1419         &dev_attr_slaves.attr,
1420         &dev_attr_mode.attr,
1421         &dev_attr_fail_over_mac.attr,
1422         &dev_attr_arp_validate.attr,
1423         &dev_attr_arp_interval.attr,
1424         &dev_attr_arp_ip_target.attr,
1425         &dev_attr_downdelay.attr,
1426         &dev_attr_updelay.attr,
1427         &dev_attr_lacp_rate.attr,
1428         &dev_attr_xmit_hash_policy.attr,
1429         &dev_attr_num_grat_arp.attr,
1430         &dev_attr_miimon.attr,
1431         &dev_attr_primary.attr,
1432         &dev_attr_use_carrier.attr,
1433         &dev_attr_active_slave.attr,
1434         &dev_attr_mii_status.attr,
1435         &dev_attr_ad_aggregator.attr,
1436         &dev_attr_ad_num_ports.attr,
1437         &dev_attr_ad_actor_key.attr,
1438         &dev_attr_ad_partner_key.attr,
1439         &dev_attr_ad_partner_mac.attr,
1440         NULL,
1441 };
1442
1443 static struct attribute_group bonding_group = {
1444         .name = "bonding",
1445         .attrs = per_bond_attrs,
1446 };
1447
1448 /*
1449  * Initialize sysfs.  This sets up the bonding_masters file in
1450  * /sys/class/net.
1451  */
1452 int bond_create_sysfs(void)
1453 {
1454         int ret = 0;
1455         struct bonding *firstbond;
1456
1457         /* get the netdev class pointer */
1458         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1459         if (!firstbond)
1460                 return -ENODEV;
1461
1462         netdev_class = firstbond->dev->dev.class;
1463         if (!netdev_class)
1464                 return -ENODEV;
1465
1466         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1467         /*
1468          * Permit multiple loads of the module by ignoring failures to
1469          * create the bonding_masters sysfs file.  Bonding devices
1470          * created by second or subsequent loads of the module will
1471          * not be listed in, or controllable by, bonding_masters, but
1472          * will have the usual "bonding" sysfs directory.
1473          *
1474          * This is done to preserve backwards compatibility for
1475          * initscripts/sysconfig, which load bonding multiple times to
1476          * configure multiple bonding devices.
1477          */
1478         if (ret == -EEXIST) {
1479                 /* Is someone being kinky and naming a device bonding_master? */
1480                 if (__dev_get_by_name(&init_net,
1481                                       class_attr_bonding_masters.attr.name))
1482                         printk(KERN_ERR
1483                                "network device named %s already exists in sysfs",
1484                                class_attr_bonding_masters.attr.name);
1485                 else {
1486                         netdev_class = NULL;
1487                         return 0;
1488                 }
1489         }
1490
1491         return ret;
1492
1493 }
1494
1495 /*
1496  * Remove /sys/class/net/bonding_masters.
1497  */
1498 void bond_destroy_sysfs(void)
1499 {
1500         if (netdev_class)
1501                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1502 }
1503
1504 /*
1505  * Initialize sysfs for each bond.  This sets up and registers
1506  * the 'bondctl' directory for each individual bond under /sys/class/net.
1507  */
1508 int bond_create_sysfs_entry(struct bonding *bond)
1509 {
1510         struct net_device *dev = bond->dev;
1511         int err;
1512
1513         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1514         if (err) {
1515                 printk(KERN_EMERG "eek! didn't create group!\n");
1516         }
1517
1518         if (expected_refcount < 1)
1519                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1520
1521         return err;
1522 }
1523 /*
1524  * Remove sysfs entries for each bond.
1525  */
1526 void bond_destroy_sysfs_entry(struct bonding *bond)
1527 {
1528         struct net_device *dev = bond->dev;
1529
1530         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1531 }
1532