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 extern struct bond_parm_tbl fail_over_mac_tbl[];
  54
  55 static int expected_refcount = -1;
  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                                 res = bond_release(bond->dev, dev);
 354                         if (res) {
 355                                 ret = res;
 356                                 goto out;
 357                         }
 358                         /* set the slave MTU to the default */
 359                         if (dev->change_mtu) {
 360                                 dev->change_mtu(dev, original_mtu);
 361                         } else {
 362                                 dev->mtu = original_mtu;
 363                         }
 364                 }
 365                 else {
 366                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 367                                 ifname, bond->dev->name);
 368                         ret = -ENODEV;
 369                 }
 370                 goto out;
 371         }
 372
 373 err_no_cmd:
 374         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 375         ret = -EPERM;
 376
 377 out:
 378         up_write(&(bonding_rwsem));
 379         rtnl_unlock();
 380         return ret;
 381 }
 382
 383 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 384
 385 /*
 386  * Show and set the bonding mode.  The bond interface must be down to
 387  * change the mode.
 388  */
 389 static ssize_t bonding_show_mode(struct device *d,
 390                                  struct device_attribute *attr, char *buf)
 391 {
 392         struct bonding *bond = to_bond(d);
 393
 394         return sprintf(buf, "%s %d\n",
 395                         bond_mode_tbl[bond->params.mode].modename,
 396                         bond->params.mode);
 397 }
 398
 399 static ssize_t bonding_store_mode(struct device *d,
 400                                   struct device_attribute *attr,
 401                                   const char *buf, size_t count)
 402 {
 403         int new_value, ret = count;
 404         struct bonding *bond = to_bond(d);
 405
 406         if (bond->dev->flags & IFF_UP) {
 407                 printk(KERN_ERR DRV_NAME
 408                        ": unable to update mode of %s because interface is up.\n",
 409                        bond->dev->name);
 410                 ret = -EPERM;
 411                 goto out;
 412         }
 413
 414         new_value = bond_parse_parm(buf, bond_mode_tbl);
 415         if (new_value < 0)  {
 416                 printk(KERN_ERR DRV_NAME
 417                        ": %s: Ignoring invalid mode value %.*s.\n",
 418                        bond->dev->name,
 419                        (int)strlen(buf) - 1, buf);
 420                 ret = -EINVAL;
 421                 goto out;
 422         } else {
 423                 if (bond->params.mode == BOND_MODE_8023AD)
 424                         bond_unset_master_3ad_flags(bond);
 425
 426                 if (bond->params.mode == BOND_MODE_ALB)
 427                         bond_unset_master_alb_flags(bond);
 428
 429                 bond->params.mode = new_value;
 430                 bond_set_mode_ops(bond, bond->params.mode);
 431                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 432                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 433         }
 434 out:
 435         return ret;
 436 }
 437 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 438
 439 /*
 440  * Show and set the bonding transmit hash method.  The bond interface must be down to
 441  * change the xmit hash policy.
 442  */
 443 static ssize_t bonding_show_xmit_hash(struct device *d,
 444                                       struct device_attribute *attr,
 445                                       char *buf)
 446 {
 447         struct bonding *bond = to_bond(d);
 448
 449         return sprintf(buf, "%s %d\n",
 450                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 451                        bond->params.xmit_policy);
 452 }
 453
 454 static ssize_t bonding_store_xmit_hash(struct device *d,
 455                                        struct device_attribute *attr,
 456                                        const char *buf, size_t count)
 457 {
 458         int new_value, ret = count;
 459         struct bonding *bond = to_bond(d);
 460
 461         if (bond->dev->flags & IFF_UP) {
 462                 printk(KERN_ERR DRV_NAME
 463                        "%s: Interface is up. Unable to update xmit policy.\n",
 464                        bond->dev->name);
 465                 ret = -EPERM;
 466                 goto out;
 467         }
 468
 469         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 470         if (new_value < 0)  {
 471                 printk(KERN_ERR DRV_NAME
 472                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 473                        bond->dev->name,
 474                        (int)strlen(buf) - 1, buf);
 475                 ret = -EINVAL;
 476                 goto out;
 477         } else {
 478                 bond->params.xmit_policy = new_value;
 479                 bond_set_mode_ops(bond, bond->params.mode);
 480                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 481                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 482         }
 483 out:
 484         return ret;
 485 }
 486 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 487
 488 /*
 489  * Show and set arp_validate.
 490  */
 491 static ssize_t bonding_show_arp_validate(struct device *d,
 492                                          struct device_attribute *attr,
 493                                          char *buf)
 494 {
 495         struct bonding *bond = to_bond(d);
 496
 497         return sprintf(buf, "%s %d\n",
 498                        arp_validate_tbl[bond->params.arp_validate].modename,
 499                        bond->params.arp_validate);
 500 }
 501
 502 static ssize_t bonding_store_arp_validate(struct device *d,
 503                                           struct device_attribute *attr,
 504                                           const char *buf, size_t count)
 505 {
 506         int new_value;
 507         struct bonding *bond = to_bond(d);
 508
 509         new_value = bond_parse_parm(buf, arp_validate_tbl);
 510         if (new_value < 0) {
 511                 printk(KERN_ERR DRV_NAME
 512                        ": %s: Ignoring invalid arp_validate value %s\n",
 513                        bond->dev->name, buf);
 514                 return -EINVAL;
 515         }
 516         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 517                 printk(KERN_ERR DRV_NAME
 518                        ": %s: arp_validate only supported in active-backup mode.\n",
 519                        bond->dev->name);
 520                 return -EINVAL;
 521         }
 522         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 523                bond->dev->name, arp_validate_tbl[new_value].modename,
 524                new_value);
 525
 526         if (!bond->params.arp_validate && new_value) {
 527                 bond_register_arp(bond);
 528         } else if (bond->params.arp_validate && !new_value) {
 529                 bond_unregister_arp(bond);
 530         }
 531
 532         bond->params.arp_validate = new_value;
 533
 534         return count;
 535 }
 536
 537 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 538
 539 /*
 540  * Show and store fail_over_mac.  User only allowed to change the
 541  * value when there are no slaves.
 542  */
 543 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 544 {
 545         struct bonding *bond = to_bond(d);
 546
 547         return sprintf(buf, "%s %d\n",
 548                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 549                        bond->params.fail_over_mac);
 550 }
 551
 552 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 553 {
 554         int new_value;
 555         struct bonding *bond = to_bond(d);
 556
 557         if (bond->slave_cnt != 0) {
 558                 printk(KERN_ERR DRV_NAME
 559                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 560                        bond->dev->name);
 561                 return -EPERM;
 562         }
 563
 564         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 565         if (new_value < 0) {
 566                 printk(KERN_ERR DRV_NAME
 567                        ": %s: Ignoring invalid fail_over_mac value %s.\n",
 568                        bond->dev->name, buf);
 569                 return -EINVAL;
 570         }
 571
 572         bond->params.fail_over_mac = new_value;
 573         printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
 574                bond->dev->name, fail_over_mac_tbl[new_value].modename,
 575                new_value);
 576
 577         return count;
 578 }
 579
 580 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 581
 582 /*
 583  * Show and set the arp timer interval.  There are two tricky bits
 584  * here.  First, if ARP monitoring is activated, then we must disable
 585  * MII monitoring.  Second, if the ARP timer isn't running, we must
 586  * start it.
 587  */
 588 static ssize_t bonding_show_arp_interval(struct device *d,
 589                                          struct device_attribute *attr,
 590                                          char *buf)
 591 {
 592         struct bonding *bond = to_bond(d);
 593
 594         return sprintf(buf, "%d\n", bond->params.arp_interval);
 595 }
 596
 597 static ssize_t bonding_store_arp_interval(struct device *d,
 598                                           struct device_attribute *attr,
 599                                           const char *buf, size_t count)
 600 {
 601         int new_value, ret = count;
 602         struct bonding *bond = to_bond(d);
 603
 604         if (sscanf(buf, "%d", &new_value) != 1) {
 605                 printk(KERN_ERR DRV_NAME
 606                        ": %s: no arp_interval value specified.\n",
 607                        bond->dev->name);
 608                 ret = -EINVAL;
 609                 goto out;
 610         }
 611         if (new_value < 0) {
 612                 printk(KERN_ERR DRV_NAME
 613                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 614                        bond->dev->name, new_value, INT_MAX);
 615                 ret = -EINVAL;
 616                 goto out;
 617         }
 618
 619         printk(KERN_INFO DRV_NAME
 620                ": %s: Setting ARP monitoring interval to %d.\n",
 621                bond->dev->name, new_value);
 622         bond->params.arp_interval = new_value;
 623         if (bond->params.miimon) {
 624                 printk(KERN_INFO DRV_NAME
 625                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 626                        "%s Disabling MII monitoring.\n",
 627                        bond->dev->name, bond->dev->name);
 628                 bond->params.miimon = 0;
 629                 if (delayed_work_pending(&bond->mii_work)) {
 630                         cancel_delayed_work(&bond->mii_work);
 631                         flush_workqueue(bond->wq);
 632                 }
 633         }
 634         if (!bond->params.arp_targets[0]) {
 635                 printk(KERN_INFO DRV_NAME
 636                        ": %s: ARP monitoring has been set up, "
 637                        "but no ARP targets have been specified.\n",
 638                        bond->dev->name);
 639         }
 640         if (bond->dev->flags & IFF_UP) {
 641                 /* If the interface is up, we may need to fire off
 642                  * the ARP timer.  If the interface is down, the
 643                  * timer will get fired off when the open function
 644                  * is called.
 645                  */
 646                 if (!delayed_work_pending(&bond->arp_work)) {
 647                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 648                                 INIT_DELAYED_WORK(&bond->arp_work,
 649                                                   bond_activebackup_arp_mon);
 650                         else
 651                                 INIT_DELAYED_WORK(&bond->arp_work,
 652                                                   bond_loadbalance_arp_mon);
 653
 654                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 655                 }
 656         }
 657
 658 out:
 659         return ret;
 660 }
 661 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 662
 663 /*
 664  * Show and set the arp targets.
 665  */
 666 static ssize_t bonding_show_arp_targets(struct device *d,
 667                                         struct device_attribute *attr,
 668                                         char *buf)
 669 {
 670         int i, res = 0;
 671         struct bonding *bond = to_bond(d);
 672
 673         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 674                 if (bond->params.arp_targets[i])
 675                         res += sprintf(buf + res, "%pI4 ",
 676                                        &bond->params.arp_targets[i]);
 677         }
 678         if (res)
 679                 buf[res-1] = '\n'; /* eat the leftover space */
 680         return res;
 681 }
 682
 683 static ssize_t bonding_store_arp_targets(struct device *d,
 684                                          struct device_attribute *attr,
 685                                          const char *buf, size_t count)
 686 {
 687         __be32 newtarget;
 688         int i = 0, done = 0, ret = count;
 689         struct bonding *bond = to_bond(d);
 690         __be32 *targets;
 691
 692         targets = bond->params.arp_targets;
 693         newtarget = in_aton(buf + 1);
 694         /* look for adds */
 695         if (buf[0] == '+') {
 696                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 697                         printk(KERN_ERR DRV_NAME
 698                                ": %s: invalid ARP target %pI4 specified for addition\n",
 699                                bond->dev->name, &newtarget);
 700                         ret = -EINVAL;
 701                         goto out;
 702                 }
 703                 /* look for an empty slot to put the target in, and check for dupes */
 704                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 705                         if (targets[i] == newtarget) { /* duplicate */
 706                                 printk(KERN_ERR DRV_NAME
 707                                        ": %s: ARP target %pI4 is already present\n",
 708                                        bond->dev->name, &newtarget);
 709                                 if (done)
 710                                         targets[i] = 0;
 711                                 ret = -EINVAL;
 712                                 goto out;
 713                         }
 714                         if (targets[i] == 0 && !done) {
 715                                 printk(KERN_INFO DRV_NAME
 716                                        ": %s: adding ARP target %pI4.\n",
 717                                        bond->dev->name, &newtarget);
 718                                 done = 1;
 719                                 targets[i] = newtarget;
 720                         }
 721                 }
 722                 if (!done) {
 723                         printk(KERN_ERR DRV_NAME
 724                                ": %s: ARP target table is full!\n",
 725                                bond->dev->name);
 726                         ret = -EINVAL;
 727                         goto out;
 728                 }
 729
 730         }
 731         else if (buf[0] == '-') {
 732                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 733                         printk(KERN_ERR DRV_NAME
 734                                ": %s: invalid ARP target %pI4 specified for removal\n",
 735                                bond->dev->name, &newtarget);
 736                         ret = -EINVAL;
 737                         goto out;
 738                 }
 739
 740                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 741                         if (targets[i] == newtarget) {
 742                                 printk(KERN_INFO DRV_NAME
 743                                        ": %s: removing ARP target %pI4.\n",
 744                                        bond->dev->name, &newtarget);
 745                                 targets[i] = 0;
 746                                 done = 1;
 747                         }
 748                 }
 749                 if (!done) {
 750                         printk(KERN_INFO DRV_NAME
 751                                ": %s: unable to remove nonexistent ARP target %pI4.\n",
 752                                bond->dev->name, &newtarget);
 753                         ret = -EINVAL;
 754                         goto out;
 755                 }
 756         }
 757         else {
 758                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 759                         bond->dev->name);
 760                 ret = -EPERM;
 761                 goto out;
 762         }
 763
 764 out:
 765         return ret;
 766 }
 767 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 768
 769 /*
 770  * Show and set the up and down delays.  These must be multiples of the
 771  * MII monitoring value, and are stored internally as the multiplier.
 772  * Thus, we must translate to MS for the real world.
 773  */
 774 static ssize_t bonding_show_downdelay(struct device *d,
 775                                       struct device_attribute *attr,
 776                                       char *buf)
 777 {
 778         struct bonding *bond = to_bond(d);
 779
 780         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 781 }
 782
 783 static ssize_t bonding_store_downdelay(struct device *d,
 784                                        struct device_attribute *attr,
 785                                        const char *buf, size_t count)
 786 {
 787         int new_value, ret = count;
 788         struct bonding *bond = to_bond(d);
 789
 790         if (!(bond->params.miimon)) {
 791                 printk(KERN_ERR DRV_NAME
 792                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 793                        bond->dev->name);
 794                 ret = -EPERM;
 795                 goto out;
 796         }
 797
 798         if (sscanf(buf, "%d", &new_value) != 1) {
 799                 printk(KERN_ERR DRV_NAME
 800                        ": %s: no down delay value specified.\n",
 801                        bond->dev->name);
 802                 ret = -EINVAL;
 803                 goto out;
 804         }
 805         if (new_value < 0) {
 806                 printk(KERN_ERR DRV_NAME
 807                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 808                        bond->dev->name, new_value, 1, INT_MAX);
 809                 ret = -EINVAL;
 810                 goto out;
 811         } else {
 812                 if ((new_value % bond->params.miimon) != 0) {
 813                         printk(KERN_WARNING DRV_NAME
 814                                ": %s: Warning: down delay (%d) is not a multiple "
 815                                "of miimon (%d), delay rounded to %d ms\n",
 816                                bond->dev->name, new_value, bond->params.miimon,
 817                                (new_value / bond->params.miimon) *
 818                                bond->params.miimon);
 819                 }
 820                 bond->params.downdelay = new_value / bond->params.miimon;
 821                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 822                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 823
 824         }
 825
 826 out:
 827         return ret;
 828 }
 829 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 830
 831 static ssize_t bonding_show_updelay(struct device *d,
 832                                     struct device_attribute *attr,
 833                                     char *buf)
 834 {
 835         struct bonding *bond = to_bond(d);
 836
 837         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 838
 839 }
 840
 841 static ssize_t bonding_store_updelay(struct device *d,
 842                                      struct device_attribute *attr,
 843                                      const char *buf, size_t count)
 844 {
 845         int new_value, ret = count;
 846         struct bonding *bond = to_bond(d);
 847
 848         if (!(bond->params.miimon)) {
 849                 printk(KERN_ERR DRV_NAME
 850                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 851                        bond->dev->name);
 852                 ret = -EPERM;
 853                 goto out;
 854         }
 855
 856         if (sscanf(buf, "%d", &new_value) != 1) {
 857                 printk(KERN_ERR DRV_NAME
 858                        ": %s: no up delay value specified.\n",
 859                        bond->dev->name);
 860                 ret = -EINVAL;
 861                 goto out;
 862         }
 863         if (new_value < 0) {
 864                 printk(KERN_ERR DRV_NAME
 865                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 866                        bond->dev->name, new_value, 1, INT_MAX);
 867                 ret = -EINVAL;
 868                 goto out;
 869         } else {
 870                 if ((new_value % bond->params.miimon) != 0) {
 871                         printk(KERN_WARNING DRV_NAME
 872                                ": %s: Warning: up delay (%d) is not a multiple "
 873                                "of miimon (%d), updelay rounded to %d ms\n",
 874                                bond->dev->name, new_value, bond->params.miimon,
 875                                (new_value / bond->params.miimon) *
 876                                bond->params.miimon);
 877                 }
 878                 bond->params.updelay = new_value / bond->params.miimon;
 879                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 880                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 881
 882         }
 883
 884 out:
 885         return ret;
 886 }
 887 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 888
 889 /*
 890  * Show and set the LACP interval.  Interface must be down, and the mode
 891  * must be set to 802.3ad mode.
 892  */
 893 static ssize_t bonding_show_lacp(struct device *d,
 894                                  struct device_attribute *attr,
 895                                  char *buf)
 896 {
 897         struct bonding *bond = to_bond(d);
 898
 899         return sprintf(buf, "%s %d\n",
 900                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 901                 bond->params.lacp_fast);
 902 }
 903
 904 static ssize_t bonding_store_lacp(struct device *d,
 905                                   struct device_attribute *attr,
 906                                   const char *buf, size_t count)
 907 {
 908         int new_value, ret = count;
 909         struct bonding *bond = to_bond(d);
 910
 911         if (bond->dev->flags & IFF_UP) {
 912                 printk(KERN_ERR DRV_NAME
 913                        ": %s: Unable to update LACP rate because interface is up.\n",
 914                        bond->dev->name);
 915                 ret = -EPERM;
 916                 goto out;
 917         }
 918
 919         if (bond->params.mode != BOND_MODE_8023AD) {
 920                 printk(KERN_ERR DRV_NAME
 921                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 922                        bond->dev->name);
 923                 ret = -EPERM;
 924                 goto out;
 925         }
 926
 927         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 928
 929         if ((new_value == 1) || (new_value == 0)) {
 930                 bond->params.lacp_fast = new_value;
 931                 printk(KERN_INFO DRV_NAME
 932                        ": %s: Setting LACP rate to %s (%d).\n",
 933                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 934         } else {
 935                 printk(KERN_ERR DRV_NAME
 936                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 937                         bond->dev->name, (int)strlen(buf) - 1, buf);
 938                 ret = -EINVAL;
 939         }
 940 out:
 941         return ret;
 942 }
 943 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 944
 945 /*
 946  * Show and set the number of grat ARP to send after a failover event.
 947  */
 948 static ssize_t bonding_show_n_grat_arp(struct device *d,
 949                                    struct device_attribute *attr,
 950                                    char *buf)
 951 {
 952         struct bonding *bond = to_bond(d);
 953
 954         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
 955 }
 956
 957 static ssize_t bonding_store_n_grat_arp(struct device *d,
 958                                     struct device_attribute *attr,
 959                                     const char *buf, size_t count)
 960 {
 961         int new_value, ret = count;
 962         struct bonding *bond = to_bond(d);
 963
 964         if (sscanf(buf, "%d", &new_value) != 1) {
 965                 printk(KERN_ERR DRV_NAME
 966                        ": %s: no num_grat_arp value specified.\n",
 967                        bond->dev->name);
 968                 ret = -EINVAL;
 969                 goto out;
 970         }
 971         if (new_value < 0 || new_value > 255) {
 972                 printk(KERN_ERR DRV_NAME
 973                        ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
 974                        bond->dev->name, new_value);
 975                 ret = -EINVAL;
 976                 goto out;
 977         } else {
 978                 bond->params.num_grat_arp = new_value;
 979         }
 980 out:
 981         return ret;
 982 }
 983 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
 984 /*
 985  * Show and set the MII monitor interval.  There are two tricky bits
 986  * here.  First, if MII monitoring is activated, then we must disable
 987  * ARP monitoring.  Second, if the timer isn't running, we must
 988  * start it.
 989  */
 990 static ssize_t bonding_show_miimon(struct device *d,
 991                                    struct device_attribute *attr,
 992                                    char *buf)
 993 {
 994         struct bonding *bond = to_bond(d);
 995
 996         return sprintf(buf, "%d\n", bond->params.miimon);
 997 }
 998
 999 static ssize_t bonding_store_miimon(struct device *d,
1000                                     struct device_attribute *attr,
1001                                     const char *buf, size_t count)
1002 {
1003         int new_value, ret = count;
1004         struct bonding *bond = to_bond(d);
1005
1006         if (sscanf(buf, "%d", &new_value) != 1) {
1007                 printk(KERN_ERR DRV_NAME
1008                        ": %s: no miimon value specified.\n",
1009                        bond->dev->name);
1010                 ret = -EINVAL;
1011                 goto out;
1012         }
1013         if (new_value < 0) {
1014                 printk(KERN_ERR DRV_NAME
1015                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1016                        bond->dev->name, new_value, 1, INT_MAX);
1017                 ret = -EINVAL;
1018                 goto out;
1019         } else {
1020                 printk(KERN_INFO DRV_NAME
1021                        ": %s: Setting MII monitoring interval to %d.\n",
1022                        bond->dev->name, new_value);
1023                 bond->params.miimon = new_value;
1024                 if(bond->params.updelay)
1025                         printk(KERN_INFO DRV_NAME
1026                               ": %s: Note: Updating updelay (to %d) "
1027                               "since it is a multiple of the miimon value.\n",
1028                               bond->dev->name,
1029                               bond->params.updelay * bond->params.miimon);
1030                 if(bond->params.downdelay)
1031                         printk(KERN_INFO DRV_NAME
1032                               ": %s: Note: Updating downdelay (to %d) "
1033                               "since it is a multiple of the miimon value.\n",
1034                               bond->dev->name,
1035                               bond->params.downdelay * bond->params.miimon);
1036                 if (bond->params.arp_interval) {
1037                         printk(KERN_INFO DRV_NAME
1038                                ": %s: MII monitoring cannot be used with "
1039                                "ARP monitoring. Disabling ARP monitoring...\n",
1040                                bond->dev->name);
1041                         bond->params.arp_interval = 0;
1042                         if (bond->params.arp_validate) {
1043                                 bond_unregister_arp(bond);
1044                                 bond->params.arp_validate =
1045                                         BOND_ARP_VALIDATE_NONE;
1046                         }
1047                         if (delayed_work_pending(&bond->arp_work)) {
1048                                 cancel_delayed_work(&bond->arp_work);
1049                                 flush_workqueue(bond->wq);
1050                         }
1051                 }
1052
1053                 if (bond->dev->flags & IFF_UP) {
1054                         /* If the interface is up, we may need to fire off
1055                          * the MII timer. If the interface is down, the
1056                          * timer will get fired off when the open function
1057                          * is called.
1058                          */
1059                         if (!delayed_work_pending(&bond->mii_work)) {
1060                                 INIT_DELAYED_WORK(&bond->mii_work,
1061                                                   bond_mii_monitor);
1062                                 queue_delayed_work(bond->wq,
1063                                                    &bond->mii_work, 0);
1064                         }
1065                 }
1066         }
1067 out:
1068         return ret;
1069 }
1070 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1071
1072 /*
1073  * Show and set the primary slave.  The store function is much
1074  * simpler than bonding_store_slaves function because it only needs to
1075  * handle one interface name.
1076  * The bond must be a mode that supports a primary for this be
1077  * set.
1078  */
1079 static ssize_t bonding_show_primary(struct device *d,
1080                                     struct device_attribute *attr,
1081                                     char *buf)
1082 {
1083         int count = 0;
1084         struct bonding *bond = to_bond(d);
1085
1086         if (bond->primary_slave)
1087                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1088
1089         return count;
1090 }
1091
1092 static ssize_t bonding_store_primary(struct device *d,
1093                                      struct device_attribute *attr,
1094                                      const char *buf, size_t count)
1095 {
1096         int i;
1097         struct slave *slave;
1098         struct bonding *bond = to_bond(d);
1099
1100         rtnl_lock();
1101         read_lock(&bond->lock);
1102         write_lock_bh(&bond->curr_slave_lock);
1103
1104         if (!USES_PRIMARY(bond->params.mode)) {
1105                 printk(KERN_INFO DRV_NAME
1106                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1107                        bond->dev->name, bond->dev->name, bond->params.mode);
1108         } else {
1109                 bond_for_each_slave(bond, slave, i) {
1110                         if (strnicmp
1111                             (slave->dev->name, buf,
1112                              strlen(slave->dev->name)) == 0) {
1113                                 printk(KERN_INFO DRV_NAME
1114                                        ": %s: Setting %s as primary slave.\n",
1115                                        bond->dev->name, slave->dev->name);
1116                                 bond->primary_slave = slave;
1117                                 bond_select_active_slave(bond);
1118                                 goto out;
1119                         }
1120                 }
1121
1122                 /* if we got here, then we didn't match the name of any slave */
1123
1124                 if (strlen(buf) == 0 || buf[0] == '\n') {
1125                         printk(KERN_INFO DRV_NAME
1126                                ": %s: Setting primary slave to None.\n",
1127                                bond->dev->name);
1128                         bond->primary_slave = NULL;
1129                                 bond_select_active_slave(bond);
1130                 } else {
1131                         printk(KERN_INFO DRV_NAME
1132                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1133                                bond->dev->name, (int)strlen(buf) - 1, buf);
1134                 }
1135         }
1136 out:
1137         write_unlock_bh(&bond->curr_slave_lock);
1138         read_unlock(&bond->lock);
1139         rtnl_unlock();
1140
1141         return count;
1142 }
1143 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1144
1145 /*
1146  * Show and set the use_carrier flag.
1147  */
1148 static ssize_t bonding_show_carrier(struct device *d,
1149                                     struct device_attribute *attr,
1150                                     char *buf)
1151 {
1152         struct bonding *bond = to_bond(d);
1153
1154         return sprintf(buf, "%d\n", bond->params.use_carrier);
1155 }
1156
1157 static ssize_t bonding_store_carrier(struct device *d,
1158                                      struct device_attribute *attr,
1159                                      const char *buf, size_t count)
1160 {
1161         int new_value, ret = count;
1162         struct bonding *bond = to_bond(d);
1163
1164
1165         if (sscanf(buf, "%d", &new_value) != 1) {
1166                 printk(KERN_ERR DRV_NAME
1167                        ": %s: no use_carrier value specified.\n",
1168                        bond->dev->name);
1169                 ret = -EINVAL;
1170                 goto out;
1171         }
1172         if ((new_value == 0) || (new_value == 1)) {
1173                 bond->params.use_carrier = new_value;
1174                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1175                        bond->dev->name, new_value);
1176         } else {
1177                 printk(KERN_INFO DRV_NAME
1178                        ": %s: Ignoring invalid use_carrier value %d.\n",
1179                        bond->dev->name, new_value);
1180         }
1181 out:
1182         return count;
1183 }
1184 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1185
1186
1187 /*
1188  * Show and set currently active_slave.
1189  */
1190 static ssize_t bonding_show_active_slave(struct device *d,
1191                                          struct device_attribute *attr,
1192                                          char *buf)
1193 {
1194         struct slave *curr;
1195         struct bonding *bond = to_bond(d);
1196         int count = 0;
1197
1198         read_lock(&bond->curr_slave_lock);
1199         curr = bond->curr_active_slave;
1200         read_unlock(&bond->curr_slave_lock);
1201
1202         if (USES_PRIMARY(bond->params.mode) && curr)
1203                 count = sprintf(buf, "%s\n", curr->dev->name);
1204         return count;
1205 }
1206
1207 static ssize_t bonding_store_active_slave(struct device *d,
1208                                           struct device_attribute *attr,
1209                                           const char *buf, size_t count)
1210 {
1211         int i;
1212         struct slave *slave;
1213         struct slave *old_active = NULL;
1214         struct slave *new_active = NULL;
1215         struct bonding *bond = to_bond(d);
1216
1217         rtnl_lock();
1218         read_lock(&bond->lock);
1219         write_lock_bh(&bond->curr_slave_lock);
1220
1221         if (!USES_PRIMARY(bond->params.mode)) {
1222                 printk(KERN_INFO DRV_NAME
1223                        ": %s: Unable to change active slave; %s is in mode %d\n",
1224                        bond->dev->name, bond->dev->name, bond->params.mode);
1225         } else {
1226                 bond_for_each_slave(bond, slave, i) {
1227                         if (strnicmp
1228                             (slave->dev->name, buf,
1229                              strlen(slave->dev->name)) == 0) {
1230                                 old_active = bond->curr_active_slave;
1231                                 new_active = slave;
1232                                 if (new_active == old_active) {
1233                                         /* do nothing */
1234                                         printk(KERN_INFO DRV_NAME
1235                                                ": %s: %s is already the current active slave.\n",
1236                                                bond->dev->name, slave->dev->name);
1237                                         goto out;
1238                                 }
1239                                 else {
1240                                         if ((new_active) &&
1241                                             (old_active) &&
1242                                             (new_active->link == BOND_LINK_UP) &&
1243                                             IS_UP(new_active->dev)) {
1244                                                 printk(KERN_INFO DRV_NAME
1245                                                       ": %s: Setting %s as active slave.\n",
1246                                                       bond->dev->name, slave->dev->name);
1247                                                 bond_change_active_slave(bond, new_active);
1248                                         }
1249                                         else {
1250                                                 printk(KERN_INFO DRV_NAME
1251                                                       ": %s: Could not set %s as active slave; "
1252                                                       "either %s is down or the link is down.\n",
1253                                                       bond->dev->name, slave->dev->name,
1254                                                       slave->dev->name);
1255                                         }
1256                                         goto out;
1257                                 }
1258                         }
1259                 }
1260
1261                 /* if we got here, then we didn't match the name of any slave */
1262
1263                 if (strlen(buf) == 0 || buf[0] == '\n') {
1264                         printk(KERN_INFO DRV_NAME
1265                                ": %s: Setting active slave to None.\n",
1266                                bond->dev->name);
1267                         bond->primary_slave = NULL;
1268                                 bond_select_active_slave(bond);
1269                 } else {
1270                         printk(KERN_INFO DRV_NAME
1271                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1272                                bond->dev->name, (int)strlen(buf) - 1, buf);
1273                 }
1274         }
1275 out:
1276         write_unlock_bh(&bond->curr_slave_lock);
1277         read_unlock(&bond->lock);
1278         rtnl_unlock();
1279
1280         return count;
1281
1282 }
1283 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1284
1285
1286 /*
1287  * Show link status of the bond interface.
1288  */
1289 static ssize_t bonding_show_mii_status(struct device *d,
1290                                        struct device_attribute *attr,
1291                                        char *buf)
1292 {
1293         struct slave *curr;
1294         struct bonding *bond = to_bond(d);
1295
1296         read_lock(&bond->curr_slave_lock);
1297         curr = bond->curr_active_slave;
1298         read_unlock(&bond->curr_slave_lock);
1299
1300         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1301 }
1302 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1303
1304
1305 /*
1306  * Show current 802.3ad aggregator ID.
1307  */
1308 static ssize_t bonding_show_ad_aggregator(struct device *d,
1309                                           struct device_attribute *attr,
1310                                           char *buf)
1311 {
1312         int count = 0;
1313         struct bonding *bond = to_bond(d);
1314
1315         if (bond->params.mode == BOND_MODE_8023AD) {
1316                 struct ad_info ad_info;
1317                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1318         }
1319
1320         return count;
1321 }
1322 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1323
1324
1325 /*
1326  * Show number of active 802.3ad ports.
1327  */
1328 static ssize_t bonding_show_ad_num_ports(struct device *d,
1329                                          struct device_attribute *attr,
1330                                          char *buf)
1331 {
1332         int count = 0;
1333         struct bonding *bond = to_bond(d);
1334
1335         if (bond->params.mode == BOND_MODE_8023AD) {
1336                 struct ad_info ad_info;
1337                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1338         }
1339
1340         return count;
1341 }
1342 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1343
1344
1345 /*
1346  * Show current 802.3ad actor key.
1347  */
1348 static ssize_t bonding_show_ad_actor_key(struct device *d,
1349                                          struct device_attribute *attr,
1350                                          char *buf)
1351 {
1352         int count = 0;
1353         struct bonding *bond = to_bond(d);
1354
1355         if (bond->params.mode == BOND_MODE_8023AD) {
1356                 struct ad_info ad_info;
1357                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1358         }
1359
1360         return count;
1361 }
1362 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1363
1364
1365 /*
1366  * Show current 802.3ad partner key.
1367  */
1368 static ssize_t bonding_show_ad_partner_key(struct device *d,
1369                                            struct device_attribute *attr,
1370                                            char *buf)
1371 {
1372         int count = 0;
1373         struct bonding *bond = to_bond(d);
1374
1375         if (bond->params.mode == BOND_MODE_8023AD) {
1376                 struct ad_info ad_info;
1377                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1378         }
1379
1380         return count;
1381 }
1382 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1383
1384
1385 /*
1386  * Show current 802.3ad partner mac.
1387  */
1388 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1389                                            struct device_attribute *attr,
1390                                            char *buf)
1391 {
1392         int count = 0;
1393         struct bonding *bond = to_bond(d);
1394
1395         if (bond->params.mode == BOND_MODE_8023AD) {
1396                 struct ad_info ad_info;
1397                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1398                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1399                 }
1400         }
1401
1402         return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1405
1406
1407
1408 static struct attribute *per_bond_attrs[] = {
1409         &dev_attr_slaves.attr,
1410         &dev_attr_mode.attr,
1411         &dev_attr_fail_over_mac.attr,
1412         &dev_attr_arp_validate.attr,
1413         &dev_attr_arp_interval.attr,
1414         &dev_attr_arp_ip_target.attr,
1415         &dev_attr_downdelay.attr,
1416         &dev_attr_updelay.attr,
1417         &dev_attr_lacp_rate.attr,
1418         &dev_attr_xmit_hash_policy.attr,
1419         &dev_attr_num_grat_arp.attr,
1420         &dev_attr_miimon.attr,
1421         &dev_attr_primary.attr,
1422         &dev_attr_use_carrier.attr,
1423         &dev_attr_active_slave.attr,
1424         &dev_attr_mii_status.attr,
1425         &dev_attr_ad_aggregator.attr,
1426         &dev_attr_ad_num_ports.attr,
1427         &dev_attr_ad_actor_key.attr,
1428         &dev_attr_ad_partner_key.attr,
1429         &dev_attr_ad_partner_mac.attr,
1430         NULL,
1431 };
1432
1433 static struct attribute_group bonding_group = {
1434         .name = "bonding",
1435         .attrs = per_bond_attrs,
1436 };
1437
1438 /*
1439  * Initialize sysfs.  This sets up the bonding_masters file in
1440  * /sys/class/net.
1441  */
1442 int bond_create_sysfs(void)
1443 {
1444         int ret;
1445
1446         ret = netdev_class_create_file(&class_attr_bonding_masters);
1447         /*
1448          * Permit multiple loads of the module by ignoring failures to
1449          * create the bonding_masters sysfs file.  Bonding devices
1450          * created by second or subsequent loads of the module will
1451          * not be listed in, or controllable by, bonding_masters, but
1452          * will have the usual "bonding" sysfs directory.
1453          *
1454          * This is done to preserve backwards compatibility for
1455          * initscripts/sysconfig, which load bonding multiple times to
1456          * configure multiple bonding devices.
1457          */
1458         if (ret == -EEXIST) {
1459                 /* Is someone being kinky and naming a device bonding_master? */
1460                 if (__dev_get_by_name(&init_net,
1461                                       class_attr_bonding_masters.attr.name))
1462                         printk(KERN_ERR
1463                                "network device named %s already exists in sysfs",
1464                                class_attr_bonding_masters.attr.name);
1465         }
1466
1467         return ret;
1468
1469 }
1470
1471 /*
1472  * Remove /sys/class/net/bonding_masters.
1473  */
1474 void bond_destroy_sysfs(void)
1475 {
1476         netdev_class_remove_file(&class_attr_bonding_masters);
1477 }
1478
1479 /*
1480  * Initialize sysfs for each bond.  This sets up and registers
1481  * the 'bondctl' directory for each individual bond under /sys/class/net.
1482  */
1483 int bond_create_sysfs_entry(struct bonding *bond)
1484 {
1485         struct net_device *dev = bond->dev;
1486         int err;
1487
1488         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1489         if (err) {
1490                 printk(KERN_EMERG "eek! didn't create group!\n");
1491         }
1492
1493         if (expected_refcount < 1)
1494                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1495
1496         return err;
1497 }
1498 /*
1499  * Remove sysfs entries for each bond.
1500  */
1501 void bond_destroy_sysfs_entry(struct bonding *bond)
1502 {
1503         struct net_device *dev = bond->dev;
1504
1505         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1506 }
1507