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/config.h>
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/sched.h>
  27 #include <linux/device.h>
  28 #include <linux/sysdev.h>
  29 #include <linux/fs.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/inetdevice.h>
  34 #include <linux/in.h>
  35 #include <linux/sysfs.h>
  36 #include <linux/string.h>
  37 #include <linux/ctype.h>
  38 #include <linux/inet.h>
  39 #include <linux/rtnetlink.h>
  40
  41 /* #define BONDING_DEBUG 1 */
  42 #include "bonding.h"
  43 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
  44 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
  45 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  46
  47 /*---------------------------- Declarations -------------------------------*/
  48
  49
  50 extern struct list_head bond_dev_list;
  51 extern struct bond_params bonding_defaults;
  52 extern struct bond_parm_tbl bond_mode_tbl[];
  53 extern struct bond_parm_tbl bond_lacp_tbl[];
  54 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  55
  56 static int expected_refcount = -1;
  57 static struct class *netdev_class;
  58 /*--------------------------- Data Structures -----------------------------*/
  59
  60 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
  61  * Because kobject_register tries to acquire the subsystem lock.  If
  62  * we already hold the lock (which we would if the user was creating
  63  * a new bond through the sysfs interface), we deadlock.
  64  * This lock is only needed when deleting a bond - we need to make sure
  65  * that we don't collide with an ongoing ioctl.
  66  */
  67
  68 struct rw_semaphore bonding_rwsem;
  69
  70
  71
  72
  73 /*------------------------------ Functions --------------------------------*/
  74
  75 /*
  76  * "show" function for the bond_masters attribute.
  77  * The class parameter is ignored.
  78  */
  79 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
  80 {
  81         int res = 0;
  82         struct bonding *bond;
  83
  84         down_read(&(bonding_rwsem));
  85
  86         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  87                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  88                         /* not enough space for another interface name */
  89                         if ((PAGE_SIZE - res) > 10)
  90                                 res = PAGE_SIZE - 10;
  91                         res += sprintf(buffer + res, "++more++");
  92                         break;
  93                 }
  94                 res += sprintf(buffer + res, "%s ",
  95                                bond->dev->name);
  96         }
  97         res += sprintf(buffer + res, "\n");
  98         res++;
  99         up_read(&(bonding_rwsem));
 100         return res;
 101 }
 102
 103 /*
 104  * "store" function for the bond_masters attribute.  This is what
 105  * creates and deletes entire bonds.
 106  *
 107  * The class parameter is ignored.
 108  *
 109  */
 110
 111 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 112 {
 113         char command[IFNAMSIZ + 1] = {0, };
 114         char *ifname;
 115         int res = count;
 116         struct bonding *bond;
 117         struct bonding *nxt;
 118
 119         down_write(&(bonding_rwsem));
 120         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 121         ifname = command + 1;
 122         if ((strlen(command) <= 1) ||
 123             !dev_valid_name(ifname))
 124                 goto err_no_cmd;
 125
 126         if (command[0] == '+') {
 127
 128                 /* Check to see if the bond already exists. */
 129                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 130                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 131                                 printk(KERN_ERR DRV_NAME
 132                                         ": cannot add bond %s; it already exists\n",
 133                                         ifname);
 134                                 res = -EPERM;
 135                                 goto out;
 136                         }
 137
 138                 printk(KERN_INFO DRV_NAME
 139                         ": %s is being created...\n", ifname);
 140                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 141                         printk(KERN_INFO DRV_NAME
 142                         ": %s interface already exists. Bond creation failed.\n",
 143                         ifname);
 144                         res = -EPERM;
 145                 }
 146                 goto out;
 147         }
 148
 149         if (command[0] == '-') {
 150                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 151                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 152                                 rtnl_lock();
 153                                 /* check the ref count on the bond's kobject.
 154                                  * If it's > expected, then there's a file open,
 155                                  * and we have to fail.
 156                                  */
 157                                 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
 158                                                         > expected_refcount){
 159                                         rtnl_unlock();
 160                                         printk(KERN_INFO DRV_NAME
 161                                                 ": Unable remove bond %s due to open references.\n",
 162                                                 ifname);
 163                                         res = -EPERM;
 164                                         goto out;
 165                                 }
 166                                 printk(KERN_INFO DRV_NAME
 167                                         ": %s is being deleted...\n",
 168                                         bond->dev->name);
 169                                 unregister_netdevice(bond->dev);
 170                                 bond_deinit(bond->dev);
 171                                 bond_destroy_sysfs_entry(bond);
 172                                 rtnl_unlock();
 173                                 goto out;
 174                         }
 175
 176                 printk(KERN_ERR DRV_NAME
 177                         ": unable to delete non-existent bond %s\n", ifname);
 178                 res = -ENODEV;
 179                 goto out;
 180         }
 181
 182 err_no_cmd:
 183         printk(KERN_ERR DRV_NAME
 184                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 185         res = -EPERM;
 186
 187         /* Always return either count or an error.  If you return 0, you'll
 188          * get called forever, which is bad.
 189          */
 190 out:
 191         up_write(&(bonding_rwsem));
 192         return res;
 193 }
 194 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 195 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 196                   bonding_show_bonds, bonding_store_bonds);
 197
 198 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 199 {
 200         char linkname[IFNAMSIZ+7];
 201         int ret = 0;
 202
 203         /* first, create a link from the slave back to the master */
 204         ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
 205                                 "master");
 206         if (ret)
 207                 return ret;
 208         /* next, create a link from the master to the slave */
 209         sprintf(linkname,"slave_%s",slave->name);
 210         ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
 211                                 linkname);
 212         return ret;
 213
 214 }
 215
 216 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 217 {
 218         char linkname[IFNAMSIZ+7];
 219
 220         sysfs_remove_link(&(slave->class_dev.kobj), "master");
 221         sprintf(linkname,"slave_%s",slave->name);
 222         sysfs_remove_link(&(master->class_dev.kobj), linkname);
 223 }
 224
 225
 226 /*
 227  * Show the slaves in the current bond.
 228  */
 229 static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
 230 {
 231         struct slave *slave;
 232         int i, res = 0;
 233         struct bonding *bond = to_bond(cd);
 234
 235         read_lock_bh(&bond->lock);
 236         bond_for_each_slave(bond, slave, i) {
 237                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 238                         /* not enough space for another interface name */
 239                         if ((PAGE_SIZE - res) > 10)
 240                                 res = PAGE_SIZE - 10;
 241                         res += sprintf(buf + res, "++more++");
 242                         break;
 243                 }
 244                 res += sprintf(buf + res, "%s ", slave->dev->name);
 245         }
 246         read_unlock_bh(&bond->lock);
 247         res += sprintf(buf + res, "\n");
 248         res++;
 249         return res;
 250 }
 251
 252 /*
 253  * Set the slaves in the current bond.  The bond interface must be
 254  * up for this to succeed.
 255  * This function is largely the same flow as bonding_update_bonds().
 256  */
 257 static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
 258 {
 259         char command[IFNAMSIZ + 1] = { 0, };
 260         char *ifname;
 261         int i, res, found, ret = count;
 262         struct slave *slave;
 263         struct net_device *dev = NULL;
 264         struct bonding *bond = to_bond(cd);
 265
 266         /* Quick sanity check -- is the bond interface up? */
 267         if (!(bond->dev->flags & IFF_UP)) {
 268                 printk(KERN_ERR DRV_NAME
 269                        ": %s: Unable to update slaves because interface is down.\n",
 270                        bond->dev->name);
 271                 ret = -EPERM;
 272                 goto out;
 273         }
 274
 275         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 276
 277         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 278         ifname = command + 1;
 279         if ((strlen(command) <= 1) ||
 280             !dev_valid_name(ifname))
 281                 goto err_no_cmd;
 282
 283         if (command[0] == '+') {
 284
 285                 /* Got a slave name in ifname.  Is it already in the list? */
 286                 found = 0;
 287                 read_lock_bh(&bond->lock);
 288                 bond_for_each_slave(bond, slave, i)
 289                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 290                                 printk(KERN_ERR DRV_NAME
 291                                        ": %s: Interface %s is already enslaved!\n",
 292                                        bond->dev->name, ifname);
 293                                 ret = -EPERM;
 294                                 read_unlock_bh(&bond->lock);
 295                                 goto out;
 296                         }
 297
 298                 read_unlock_bh(&bond->lock);
 299                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 300                        bond->dev->name, ifname);
 301                 dev = dev_get_by_name(ifname);
 302                 if (!dev) {
 303                         printk(KERN_INFO DRV_NAME
 304                                ": %s: Interface %s does not exist!\n",
 305                                bond->dev->name, ifname);
 306                         ret = -EPERM;
 307                         goto out;
 308                 }
 309                 else
 310                         dev_put(dev);
 311
 312                 if (dev->flags & IFF_UP) {
 313                         printk(KERN_ERR DRV_NAME
 314                                ": %s: Error: Unable to enslave %s "
 315                                "because it is already up.\n",
 316                                bond->dev->name, dev->name);
 317                         ret = -EPERM;
 318                         goto out;
 319                 }
 320                 /* If this is the first slave, then we need to set
 321                    the master's hardware address to be the same as the
 322                    slave's. */
 323                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 324                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 325                                dev->addr_len);
 326                 }
 327
 328                 /* Set the slave's MTU to match the bond */
 329                 if (dev->mtu != bond->dev->mtu) {
 330                         if (dev->change_mtu) {
 331                                 res = dev->change_mtu(dev,
 332                                                       bond->dev->mtu);
 333                                 if (res) {
 334                                         ret = res;
 335                                         goto out;
 336                                 }
 337                         } else {
 338                                 dev->mtu = bond->dev->mtu;
 339                         }
 340                 }
 341                 rtnl_lock();
 342                 res = bond_enslave(bond->dev, dev);
 343                 rtnl_unlock();
 344                 if (res) {
 345                         ret = res;
 346                 }
 347                 goto out;
 348         }
 349
 350         if (command[0] == '-') {
 351                 dev = NULL;
 352                 bond_for_each_slave(bond, slave, i)
 353                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 354                                 dev = slave->dev;
 355                                 break;
 356                         }
 357                 if (dev) {
 358                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 359                                 bond->dev->name, dev->name);
 360                         rtnl_lock();
 361                         res = bond_release(bond->dev, dev);
 362                         rtnl_unlock();
 363                         if (res) {
 364                                 ret = res;
 365                                 goto out;
 366                         }
 367                         /* set the slave MTU to the default */
 368                         if (dev->change_mtu) {
 369                                 dev->change_mtu(dev, 1500);
 370                         } else {
 371                                 dev->mtu = 1500;
 372                         }
 373                 }
 374                 else {
 375                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 376                                 ifname, bond->dev->name);
 377                         ret = -ENODEV;
 378                 }
 379                 goto out;
 380         }
 381
 382 err_no_cmd:
 383         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 384         ret = -EPERM;
 385
 386 out:
 387         return ret;
 388 }
 389
 390 static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 391
 392 /*
 393  * Show and set the bonding mode.  The bond interface must be down to
 394  * change the mode.
 395  */
 396 static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
 397 {
 398         struct bonding *bond = to_bond(cd);
 399
 400         return sprintf(buf, "%s %d\n",
 401                         bond_mode_tbl[bond->params.mode].modename,
 402                         bond->params.mode) + 1;
 403 }
 404
 405 static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
 406 {
 407         int new_value, ret = count;
 408         struct bonding *bond = to_bond(cd);
 409
 410         if (bond->dev->flags & IFF_UP) {
 411                 printk(KERN_ERR DRV_NAME
 412                        ": unable to update mode of %s because interface is up.\n",
 413                        bond->dev->name);
 414                 ret = -EPERM;
 415                 goto out;
 416         }
 417
 418         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 419         if (new_value < 0)  {
 420                 printk(KERN_ERR DRV_NAME
 421                        ": %s: Ignoring invalid mode value %.*s.\n",
 422                        bond->dev->name,
 423                        (int)strlen(buf) - 1, buf);
 424                 ret = -EINVAL;
 425                 goto out;
 426         } else {
 427                 bond->params.mode = new_value;
 428                 bond_set_mode_ops(bond, bond->params.mode);
 429                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 430                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 431         }
 432 out:
 433         return ret;
 434 }
 435 static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 436
 437 /*
 438  * Show and set the bonding transmit hash method.  The bond interface must be down to
 439  * change the xmit hash policy.
 440  */
 441 static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
 442 {
 443         int count;
 444         struct bonding *bond = to_bond(cd);
 445
 446         if ((bond->params.mode != BOND_MODE_XOR) &&
 447             (bond->params.mode != BOND_MODE_8023AD)) {
 448                 // Not Applicable
 449                 count = sprintf(buf, "NA\n") + 1;
 450         } else {
 451                 count = sprintf(buf, "%s %d\n",
 452                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 453                         bond->params.xmit_policy) + 1;
 454         }
 455
 456         return count;
 457 }
 458
 459 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
 460 {
 461         int new_value, ret = count;
 462         struct bonding *bond = to_bond(cd);
 463
 464         if (bond->dev->flags & IFF_UP) {
 465                 printk(KERN_ERR DRV_NAME
 466                        "%s: Interface is up. Unable to update xmit policy.\n",
 467                        bond->dev->name);
 468                 ret = -EPERM;
 469                 goto out;
 470         }
 471
 472         if ((bond->params.mode != BOND_MODE_XOR) &&
 473             (bond->params.mode != BOND_MODE_8023AD)) {
 474                 printk(KERN_ERR DRV_NAME
 475                        "%s: Transmit hash policy is irrelevant in this mode.\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 CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 499
 500 /*
 501  * Show and set the arp timer interval.  There are two tricky bits
 502  * here.  First, if ARP monitoring is activated, then we must disable
 503  * MII monitoring.  Second, if the ARP timer isn't running, we must
 504  * start it.
 505  */
 506 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
 507 {
 508         struct bonding *bond = to_bond(cd);
 509
 510         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 511 }
 512
 513 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
 514 {
 515         int new_value, ret = count;
 516         struct bonding *bond = to_bond(cd);
 517
 518         if (sscanf(buf, "%d", &new_value) != 1) {
 519                 printk(KERN_ERR DRV_NAME
 520                        ": %s: no arp_interval value specified.\n",
 521                        bond->dev->name);
 522                 ret = -EINVAL;
 523                 goto out;
 524         }
 525         if (new_value < 0) {
 526                 printk(KERN_ERR DRV_NAME
 527                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 528                        bond->dev->name, new_value, INT_MAX);
 529                 ret = -EINVAL;
 530                 goto out;
 531         }
 532
 533         printk(KERN_INFO DRV_NAME
 534                ": %s: Setting ARP monitoring interval to %d.\n",
 535                bond->dev->name, new_value);
 536         bond->params.arp_interval = new_value;
 537         if (bond->params.miimon) {
 538                 printk(KERN_INFO DRV_NAME
 539                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 540                        "%s Disabling MII monitoring.\n",
 541                        bond->dev->name, bond->dev->name);
 542                 bond->params.miimon = 0;
 543                 /* Kill MII timer, else it brings bond's link down */
 544                 if (bond->arp_timer.function) {
 545                         printk(KERN_INFO DRV_NAME
 546                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 547                        bond->dev->name);
 548                         del_timer_sync(&bond->mii_timer);
 549                 }
 550         }
 551         if (!bond->params.arp_targets[0]) {
 552                 printk(KERN_INFO DRV_NAME
 553                        ": %s: ARP monitoring has been set up, "
 554                        "but no ARP targets have been specified.\n",
 555                        bond->dev->name);
 556         }
 557         if (bond->dev->flags & IFF_UP) {
 558                 /* If the interface is up, we may need to fire off
 559                  * the ARP timer.  If the interface is down, the
 560                  * timer will get fired off when the open function
 561                  * is called.
 562                  */
 563                 if (bond->arp_timer.function) {
 564                         /* The timer's already set up, so fire it off */
 565                         mod_timer(&bond->arp_timer, jiffies + 1);
 566                 } else {
 567                         /* Set up the timer. */
 568                         init_timer(&bond->arp_timer);
 569                         bond->arp_timer.expires = jiffies + 1;
 570                         bond->arp_timer.data =
 571                                 (unsigned long) bond->dev;
 572                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 573                                 bond->arp_timer.function =
 574                                         (void *)
 575                                         &bond_activebackup_arp_mon;
 576                         } else {
 577                                 bond->arp_timer.function =
 578                                         (void *)
 579                                         &bond_loadbalance_arp_mon;
 580                         }
 581                         add_timer(&bond->arp_timer);
 582                 }
 583         }
 584
 585 out:
 586         return ret;
 587 }
 588 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 589
 590 /*
 591  * Show and set the arp targets.
 592  */
 593 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
 594 {
 595         int i, res = 0;
 596         struct bonding *bond = to_bond(cd);
 597
 598         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 599                 if (bond->params.arp_targets[i])
 600                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 601                                NIPQUAD(bond->params.arp_targets[i]));
 602         }
 603         if (res)
 604                 res--;  /* eat the leftover space */
 605         res += sprintf(buf + res, "\n");
 606         res++;
 607         return res;
 608 }
 609
 610 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
 611 {
 612         u32 newtarget;
 613         int i = 0, done = 0, ret = count;
 614         struct bonding *bond = to_bond(cd);
 615         u32 *targets;
 616
 617         targets = bond->params.arp_targets;
 618         newtarget = in_aton(buf + 1);
 619         /* look for adds */
 620         if (buf[0] == '+') {
 621                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 622                         printk(KERN_ERR DRV_NAME
 623                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 624                                bond->dev->name, NIPQUAD(newtarget));
 625                         ret = -EINVAL;
 626                         goto out;
 627                 }
 628                 /* look for an empty slot to put the target in, and check for dupes */
 629                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 630                         if (targets[i] == newtarget) { /* duplicate */
 631                                 printk(KERN_ERR DRV_NAME
 632                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 633                                        bond->dev->name, NIPQUAD(newtarget));
 634                                 if (done)
 635                                         targets[i] = 0;
 636                                 ret = -EINVAL;
 637                                 goto out;
 638                         }
 639                         if (targets[i] == 0 && !done) {
 640                                 printk(KERN_INFO DRV_NAME
 641                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 642                                        bond->dev->name, NIPQUAD(newtarget));
 643                                 done = 1;
 644                                 targets[i] = newtarget;
 645                         }
 646                 }
 647                 if (!done) {
 648                         printk(KERN_ERR DRV_NAME
 649                                ": %s: ARP target table is full!\n",
 650                                bond->dev->name);
 651                         ret = -EINVAL;
 652                         goto out;
 653                 }
 654
 655         }
 656         else if (buf[0] == '-') {
 657                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 658                         printk(KERN_ERR DRV_NAME
 659                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 660                                bond->dev->name, NIPQUAD(newtarget));
 661                         ret = -EINVAL;
 662                         goto out;
 663                 }
 664
 665                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 666                         if (targets[i] == newtarget) {
 667                                 printk(KERN_INFO DRV_NAME
 668                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 669                                        bond->dev->name, NIPQUAD(newtarget));
 670                                 targets[i] = 0;
 671                                 done = 1;
 672                         }
 673                 }
 674                 if (!done) {
 675                         printk(KERN_INFO DRV_NAME
 676                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 677                                bond->dev->name, NIPQUAD(newtarget));
 678                         ret = -EINVAL;
 679                         goto out;
 680                 }
 681         }
 682         else {
 683                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 684                         bond->dev->name);
 685                 ret = -EPERM;
 686                 goto out;
 687         }
 688
 689 out:
 690         return ret;
 691 }
 692 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 693
 694 /*
 695  * Show and set the up and down delays.  These must be multiples of the
 696  * MII monitoring value, and are stored internally as the multiplier.
 697  * Thus, we must translate to MS for the real world.
 698  */
 699 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
 700 {
 701         struct bonding *bond = to_bond(cd);
 702
 703         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 704 }
 705
 706 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
 707 {
 708         int new_value, ret = count;
 709         struct bonding *bond = to_bond(cd);
 710
 711         if (!(bond->params.miimon)) {
 712                 printk(KERN_ERR DRV_NAME
 713                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 714                        bond->dev->name);
 715                 ret = -EPERM;
 716                 goto out;
 717         }
 718
 719         if (sscanf(buf, "%d", &new_value) != 1) {
 720                 printk(KERN_ERR DRV_NAME
 721                        ": %s: no down delay value specified.\n",
 722                        bond->dev->name);
 723                 ret = -EINVAL;
 724                 goto out;
 725         }
 726         if (new_value < 0) {
 727                 printk(KERN_ERR DRV_NAME
 728                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 729                        bond->dev->name, new_value, 1, INT_MAX);
 730                 ret = -EINVAL;
 731                 goto out;
 732         } else {
 733                 if ((new_value % bond->params.miimon) != 0) {
 734                         printk(KERN_WARNING DRV_NAME
 735                                ": %s: Warning: down delay (%d) is not a multiple "
 736                                "of miimon (%d), delay rounded to %d ms\n",
 737                                bond->dev->name, new_value, bond->params.miimon,
 738                                (new_value / bond->params.miimon) *
 739                                bond->params.miimon);
 740                 }
 741                 bond->params.downdelay = new_value / bond->params.miimon;
 742                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 743                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 744
 745         }
 746
 747 out:
 748         return ret;
 749 }
 750 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 751
 752 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
 753 {
 754         struct bonding *bond = to_bond(cd);
 755
 756         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 757
 758 }
 759
 760 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
 761 {
 762         int new_value, ret = count;
 763         struct bonding *bond = to_bond(cd);
 764
 765         if (!(bond->params.miimon)) {
 766                 printk(KERN_ERR DRV_NAME
 767                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 768                        bond->dev->name);
 769                 ret = -EPERM;
 770                 goto out;
 771         }
 772
 773         if (sscanf(buf, "%d", &new_value) != 1) {
 774                 printk(KERN_ERR DRV_NAME
 775                        ": %s: no up delay value specified.\n",
 776                        bond->dev->name);
 777                 ret = -EINVAL;
 778                 goto out;
 779         }
 780         if (new_value < 0) {
 781                 printk(KERN_ERR DRV_NAME
 782                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 783                        bond->dev->name, new_value, 1, INT_MAX);
 784                 ret = -EINVAL;
 785                 goto out;
 786         } else {
 787                 if ((new_value % bond->params.miimon) != 0) {
 788                         printk(KERN_WARNING DRV_NAME
 789                                ": %s: Warning: up delay (%d) is not a multiple "
 790                                "of miimon (%d), updelay rounded to %d ms\n",
 791                                bond->dev->name, new_value, bond->params.miimon,
 792                                (new_value / bond->params.miimon) *
 793                                bond->params.miimon);
 794                 }
 795                 bond->params.updelay = new_value / bond->params.miimon;
 796                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 797                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 798
 799         }
 800
 801 out:
 802         return ret;
 803 }
 804 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 805
 806 /*
 807  * Show and set the LACP interval.  Interface must be down, and the mode
 808  * must be set to 802.3ad mode.
 809  */
 810 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
 811 {
 812         struct bonding *bond = to_bond(cd);
 813
 814         return sprintf(buf, "%s %d\n",
 815                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 816                 bond->params.lacp_fast) + 1;
 817 }
 818
 819 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
 820 {
 821         int new_value, ret = count;
 822         struct bonding *bond = to_bond(cd);
 823
 824         if (bond->dev->flags & IFF_UP) {
 825                 printk(KERN_ERR DRV_NAME
 826                        ": %s: Unable to update LACP rate because interface is up.\n",
 827                        bond->dev->name);
 828                 ret = -EPERM;
 829                 goto out;
 830         }
 831
 832         if (bond->params.mode != BOND_MODE_8023AD) {
 833                 printk(KERN_ERR DRV_NAME
 834                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 835                        bond->dev->name);
 836                 ret = -EPERM;
 837                 goto out;
 838         }
 839
 840         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 841
 842         if ((new_value == 1) || (new_value == 0)) {
 843                 bond->params.lacp_fast = new_value;
 844                 printk(KERN_INFO DRV_NAME
 845                        ": %s: Setting LACP rate to %s (%d).\n",
 846                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 847         } else {
 848                 printk(KERN_ERR DRV_NAME
 849                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 850                         bond->dev->name, (int)strlen(buf) - 1, buf);
 851                 ret = -EINVAL;
 852         }
 853 out:
 854         return ret;
 855 }
 856 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 857
 858 /*
 859  * Show and set the MII monitor interval.  There are two tricky bits
 860  * here.  First, if MII monitoring is activated, then we must disable
 861  * ARP monitoring.  Second, if the timer isn't running, we must
 862  * start it.
 863  */
 864 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
 865 {
 866         struct bonding *bond = to_bond(cd);
 867
 868         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 869 }
 870
 871 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
 872 {
 873         int new_value, ret = count;
 874         struct bonding *bond = to_bond(cd);
 875
 876         if (sscanf(buf, "%d", &new_value) != 1) {
 877                 printk(KERN_ERR DRV_NAME
 878                        ": %s: no miimon value specified.\n",
 879                        bond->dev->name);
 880                 ret = -EINVAL;
 881                 goto out;
 882         }
 883         if (new_value < 0) {
 884                 printk(KERN_ERR DRV_NAME
 885                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 886                        bond->dev->name, new_value, 1, INT_MAX);
 887                 ret = -EINVAL;
 888                 goto out;
 889         } else {
 890                 printk(KERN_INFO DRV_NAME
 891                        ": %s: Setting MII monitoring interval to %d.\n",
 892                        bond->dev->name, new_value);
 893                 bond->params.miimon = new_value;
 894                 if(bond->params.updelay)
 895                         printk(KERN_INFO DRV_NAME
 896                               ": %s: Note: Updating updelay (to %d) "
 897                               "since it is a multiple of the miimon value.\n",
 898                               bond->dev->name,
 899                               bond->params.updelay * bond->params.miimon);
 900                 if(bond->params.downdelay)
 901                         printk(KERN_INFO DRV_NAME
 902                               ": %s: Note: Updating downdelay (to %d) "
 903                               "since it is a multiple of the miimon value.\n",
 904                               bond->dev->name,
 905                               bond->params.downdelay * bond->params.miimon);
 906                 if (bond->params.arp_interval) {
 907                         printk(KERN_INFO DRV_NAME
 908                                ": %s: MII monitoring cannot be used with "
 909                                "ARP monitoring. Disabling ARP monitoring...\n",
 910                                bond->dev->name);
 911                         bond->params.arp_interval = 0;
 912                         /* Kill ARP timer, else it brings bond's link down */
 913                         if (bond->mii_timer.function) {
 914                                 printk(KERN_INFO DRV_NAME
 915                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
 916                                bond->dev->name);
 917                                 del_timer_sync(&bond->arp_timer);
 918                         }
 919                 }
 920
 921                 if (bond->dev->flags & IFF_UP) {
 922                         /* If the interface is up, we may need to fire off
 923                          * the MII timer. If the interface is down, the
 924                          * timer will get fired off when the open function
 925                          * is called.
 926                          */
 927                         if (bond->mii_timer.function) {
 928                                 /* The timer's already set up, so fire it off */
 929                                 mod_timer(&bond->mii_timer, jiffies + 1);
 930                         } else {
 931                                 /* Set up the timer. */
 932                                 init_timer(&bond->mii_timer);
 933                                 bond->mii_timer.expires = jiffies + 1;
 934                                 bond->mii_timer.data =
 935                                         (unsigned long) bond->dev;
 936                                 bond->mii_timer.function =
 937                                         (void *) &bond_mii_monitor;
 938                                 add_timer(&bond->mii_timer);
 939                         }
 940                 }
 941         }
 942 out:
 943         return ret;
 944 }
 945 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
 946
 947 /*
 948  * Show and set the primary slave.  The store function is much
 949  * simpler than bonding_store_slaves function because it only needs to
 950  * handle one interface name.
 951  * The bond must be a mode that supports a primary for this be
 952  * set.
 953  */
 954 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
 955 {
 956         int count = 0;
 957         struct bonding *bond = to_bond(cd);
 958
 959         if (bond->primary_slave)
 960                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
 961         else
 962                 count = sprintf(buf, "\n") + 1;
 963
 964         return count;
 965 }
 966
 967 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
 968 {
 969         int i;
 970         struct slave *slave;
 971         struct bonding *bond = to_bond(cd);
 972
 973         write_lock_bh(&bond->lock);
 974         if (!USES_PRIMARY(bond->params.mode)) {
 975                 printk(KERN_INFO DRV_NAME
 976                        ": %s: Unable to set primary slave; %s is in mode %d\n",
 977                        bond->dev->name, bond->dev->name, bond->params.mode);
 978         } else {
 979                 bond_for_each_slave(bond, slave, i) {
 980                         if (strnicmp
 981                             (slave->dev->name, buf,
 982                              strlen(slave->dev->name)) == 0) {
 983                                 printk(KERN_INFO DRV_NAME
 984                                        ": %s: Setting %s as primary slave.\n",
 985                                        bond->dev->name, slave->dev->name);
 986                                 bond->primary_slave = slave;
 987                                 bond_select_active_slave(bond);
 988                                 goto out;
 989                         }
 990                 }
 991
 992                 /* if we got here, then we didn't match the name of any slave */
 993
 994                 if (strlen(buf) == 0 || buf[0] == '\n') {
 995                         printk(KERN_INFO DRV_NAME
 996                                ": %s: Setting primary slave to None.\n",
 997                                bond->dev->name);
 998                         bond->primary_slave = NULL;
 999                                 bond_select_active_slave(bond);
1000                 } else {
1001                         printk(KERN_INFO DRV_NAME
1002                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1003                                bond->dev->name, (int)strlen(buf) - 1, buf);
1004                 }
1005         }
1006 out:
1007         write_unlock_bh(&bond->lock);
1008         return count;
1009 }
1010 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1011
1012 /*
1013  * Show and set the use_carrier flag.
1014  */
1015 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1016 {
1017         struct bonding *bond = to_bond(cd);
1018
1019         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1020 }
1021
1022 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1023 {
1024         int new_value, ret = count;
1025         struct bonding *bond = to_bond(cd);
1026
1027
1028         if (sscanf(buf, "%d", &new_value) != 1) {
1029                 printk(KERN_ERR DRV_NAME
1030                        ": %s: no use_carrier value specified.\n",
1031                        bond->dev->name);
1032                 ret = -EINVAL;
1033                 goto out;
1034         }
1035         if ((new_value == 0) || (new_value == 1)) {
1036                 bond->params.use_carrier = new_value;
1037                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1038                        bond->dev->name, new_value);
1039         } else {
1040                 printk(KERN_INFO DRV_NAME
1041                        ": %s: Ignoring invalid use_carrier value %d.\n",
1042                        bond->dev->name, new_value);
1043         }
1044 out:
1045         return count;
1046 }
1047 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1048
1049
1050 /*
1051  * Show and set currently active_slave.
1052  */
1053 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1054 {
1055         struct slave *curr;
1056         struct bonding *bond = to_bond(cd);
1057         int count;
1058
1059
1060         read_lock(&bond->curr_slave_lock);
1061         curr = bond->curr_active_slave;
1062         read_unlock(&bond->curr_slave_lock);
1063
1064         if (USES_PRIMARY(bond->params.mode) && curr)
1065                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1066         else
1067                 count = sprintf(buf, "\n") + 1;
1068         return count;
1069 }
1070
1071 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1072 {
1073         int i;
1074         struct slave *slave;
1075         struct slave *old_active = NULL;
1076         struct slave *new_active = NULL;
1077         struct bonding *bond = to_bond(cd);
1078
1079         write_lock_bh(&bond->lock);
1080         if (!USES_PRIMARY(bond->params.mode)) {
1081                 printk(KERN_INFO DRV_NAME
1082                        ": %s: Unable to change active slave; %s is in mode %d\n",
1083                        bond->dev->name, bond->dev->name, bond->params.mode);
1084         } else {
1085                 bond_for_each_slave(bond, slave, i) {
1086                         if (strnicmp
1087                             (slave->dev->name, buf,
1088                              strlen(slave->dev->name)) == 0) {
1089                                 old_active = bond->curr_active_slave;
1090                                 new_active = slave;
1091                                 if (new_active && (new_active == old_active)) {
1092                                         /* do nothing */
1093                                         printk(KERN_INFO DRV_NAME
1094                                                ": %s: %s is already the current active slave.\n",
1095                                                bond->dev->name, slave->dev->name);
1096                                         goto out;
1097                                 }
1098                                 else {
1099                                         if ((new_active) &&
1100                                             (old_active) &&
1101                                             (new_active->link == BOND_LINK_UP) &&
1102                                             IS_UP(new_active->dev)) {
1103                                                 printk(KERN_INFO DRV_NAME
1104                                                       ": %s: Setting %s as active slave.\n",
1105                                                       bond->dev->name, slave->dev->name);
1106                                                 bond_change_active_slave(bond, new_active);
1107                                         }
1108                                         else {
1109                                                 printk(KERN_INFO DRV_NAME
1110                                                       ": %s: Could not set %s as active slave; "
1111                                                       "either %s is down or the link is down.\n",
1112                                                       bond->dev->name, slave->dev->name,
1113                                                       slave->dev->name);
1114                                         }
1115                                         goto out;
1116                                 }
1117                         }
1118                 }
1119
1120                 /* if we got here, then we didn't match the name of any slave */
1121
1122                 if (strlen(buf) == 0 || buf[0] == '\n') {
1123                         printk(KERN_INFO DRV_NAME
1124                                ": %s: Setting active slave to None.\n",
1125                                bond->dev->name);
1126                         bond->primary_slave = NULL;
1127                                 bond_select_active_slave(bond);
1128                 } else {
1129                         printk(KERN_INFO DRV_NAME
1130                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1131                                bond->dev->name, (int)strlen(buf) - 1, buf);
1132                 }
1133         }
1134 out:
1135         write_unlock_bh(&bond->lock);
1136         return count;
1137
1138 }
1139 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1140
1141
1142 /*
1143  * Show link status of the bond interface.
1144  */
1145 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1146 {
1147         struct slave *curr;
1148         struct bonding *bond = to_bond(cd);
1149
1150         read_lock(&bond->curr_slave_lock);
1151         curr = bond->curr_active_slave;
1152         read_unlock(&bond->curr_slave_lock);
1153
1154         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1155 }
1156 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1157
1158
1159 /*
1160  * Show current 802.3ad aggregator ID.
1161  */
1162 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1163 {
1164         int count = 0;
1165         struct bonding *bond = to_bond(cd);
1166
1167         if (bond->params.mode == BOND_MODE_8023AD) {
1168                 struct ad_info ad_info;
1169                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1170         }
1171         else
1172                 count = sprintf(buf, "\n") + 1;
1173
1174         return count;
1175 }
1176 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1177
1178
1179 /*
1180  * Show number of active 802.3ad ports.
1181  */
1182 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1183 {
1184         int count = 0;
1185         struct bonding *bond = to_bond(cd);
1186
1187         if (bond->params.mode == BOND_MODE_8023AD) {
1188                 struct ad_info ad_info;
1189                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1190         }
1191         else
1192                 count = sprintf(buf, "\n") + 1;
1193
1194         return count;
1195 }
1196 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1197
1198
1199 /*
1200  * Show current 802.3ad actor key.
1201  */
1202 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1203 {
1204         int count = 0;
1205         struct bonding *bond = to_bond(cd);
1206
1207         if (bond->params.mode == BOND_MODE_8023AD) {
1208                 struct ad_info ad_info;
1209                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1210         }
1211         else
1212                 count = sprintf(buf, "\n") + 1;
1213
1214         return count;
1215 }
1216 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1217
1218
1219 /*
1220  * Show current 802.3ad partner key.
1221  */
1222 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1223 {
1224         int count = 0;
1225         struct bonding *bond = to_bond(cd);
1226
1227         if (bond->params.mode == BOND_MODE_8023AD) {
1228                 struct ad_info ad_info;
1229                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1230         }
1231         else
1232                 count = sprintf(buf, "\n") + 1;
1233
1234         return count;
1235 }
1236 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1237
1238
1239 /*
1240  * Show current 802.3ad partner mac.
1241  */
1242 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1243 {
1244         int count = 0;
1245         struct bonding *bond = to_bond(cd);
1246
1247         if (bond->params.mode == BOND_MODE_8023AD) {
1248                 struct ad_info ad_info;
1249                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1250                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1251                                        ad_info.partner_system[0],
1252                                        ad_info.partner_system[1],
1253                                        ad_info.partner_system[2],
1254                                        ad_info.partner_system[3],
1255                                        ad_info.partner_system[4],
1256                                        ad_info.partner_system[5]) + 1;
1257                 }
1258         }
1259         else
1260                 count = sprintf(buf, "\n") + 1;
1261
1262         return count;
1263 }
1264 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1265
1266
1267
1268 static struct attribute *per_bond_attrs[] = {
1269         &class_device_attr_slaves.attr,
1270         &class_device_attr_mode.attr,
1271         &class_device_attr_arp_interval.attr,
1272         &class_device_attr_arp_ip_target.attr,
1273         &class_device_attr_downdelay.attr,
1274         &class_device_attr_updelay.attr,
1275         &class_device_attr_lacp_rate.attr,
1276         &class_device_attr_xmit_hash_policy.attr,
1277         &class_device_attr_miimon.attr,
1278         &class_device_attr_primary.attr,
1279         &class_device_attr_use_carrier.attr,
1280         &class_device_attr_active_slave.attr,
1281         &class_device_attr_mii_status.attr,
1282         &class_device_attr_ad_aggregator.attr,
1283         &class_device_attr_ad_num_ports.attr,
1284         &class_device_attr_ad_actor_key.attr,
1285         &class_device_attr_ad_partner_key.attr,
1286         &class_device_attr_ad_partner_mac.attr,
1287         NULL,
1288 };
1289
1290 static struct attribute_group bonding_group = {
1291         .name = "bonding",
1292         .attrs = per_bond_attrs,
1293 };
1294
1295 /*
1296  * Initialize sysfs.  This sets up the bonding_masters file in
1297  * /sys/class/net.
1298  */
1299 int bond_create_sysfs(void)
1300 {
1301         int ret = 0;
1302         struct bonding *firstbond;
1303
1304         init_rwsem(&bonding_rwsem);
1305
1306         /* get the netdev class pointer */
1307         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1308         if (!firstbond)
1309                 return -ENODEV;
1310
1311         netdev_class = firstbond->dev->class_dev.class;
1312         if (!netdev_class)
1313                 return -ENODEV;
1314
1315         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1316
1317         return ret;
1318
1319 }
1320
1321 /*
1322  * Remove /sys/class/net/bonding_masters.
1323  */
1324 void bond_destroy_sysfs(void)
1325 {
1326         if (netdev_class)
1327                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1328 }
1329
1330 /*
1331  * Initialize sysfs for each bond.  This sets up and registers
1332  * the 'bondctl' directory for each individual bond under /sys/class/net.
1333  */
1334 int bond_create_sysfs_entry(struct bonding *bond)
1335 {
1336         struct net_device *dev = bond->dev;
1337         int err;
1338
1339         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1340         if (err) {
1341                 printk(KERN_EMERG "eek! didn't create group!\n");
1342         }
1343
1344         if (expected_refcount < 1)
1345                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1346
1347         return err;
1348 }
1349 /*
1350  * Remove sysfs entries for each bond.
1351  */
1352 void bond_destroy_sysfs_entry(struct bonding *bond)
1353 {
1354         struct net_device *dev = bond->dev;
1355
1356         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1357 }
1358