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