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 subsytem 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 *buffer)
  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(buffer + res, "++more++");
  90                         break;
  91                 }
  92                 res += sprintf(buffer + res, "%s ",
  93                                bond->dev->name);
  94         }
  95         res += sprintf(buffer + res, "\n");
  96         res++;
  97         up_read(&(bonding_rwsem));
  98         return res;
  99 }
 100
 101 /*
 102  * "store" function for the bond_masters attribute.  This is what
 103  * creates and deletes entire bonds.
 104  *
 105  * The class parameter is ignored.
 106  *
 107  */
 108
 109 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 110 {
 111         char command[IFNAMSIZ + 1] = {0, };
 112         char *ifname;
 113         int res = count;
 114         struct bonding *bond;
 115         struct bonding *nxt;
 116
 117         down_write(&(bonding_rwsem));
 118         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 119         ifname = command + 1;
 120         if ((strlen(command) <= 1) ||
 121             !dev_valid_name(ifname))
 122                 goto err_no_cmd;
 123
 124         if (command[0] == '+') {
 125
 126                 /* Check to see if the bond already exists. */
 127                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 128                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 129                                 printk(KERN_ERR DRV_NAME
 130                                         ": cannot add bond %s; it already exists\n",
 131                                         ifname);
 132                                 res = -EPERM;
 133                                 goto out;
 134                         }
 135
 136                 printk(KERN_INFO DRV_NAME
 137                         ": %s is being created...\n", ifname);
 138                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 139                         printk(KERN_INFO DRV_NAME
 140                         ": %s interface already exists. Bond creation failed.\n",
 141                         ifname);
 142                         res = -EPERM;
 143                 }
 144                 goto out;
 145         }
 146
 147         if (command[0] == '-') {
 148                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 149                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 150                                 rtnl_lock();
 151                                 /* check the ref count on the bond's kobject.
 152                                  * If it's > expected, then there's a file open,
 153                                  * and we have to fail.
 154                                  */
 155                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 156                                                         > expected_refcount){
 157                                         rtnl_unlock();
 158                                         printk(KERN_INFO DRV_NAME
 159                                                 ": Unable remove bond %s due to open references.\n",
 160                                                 ifname);
 161                                         res = -EPERM;
 162                                         goto out;
 163                                 }
 164                                 printk(KERN_INFO DRV_NAME
 165                                         ": %s is being deleted...\n",
 166                                         bond->dev->name);
 167                                 bond_destroy(bond);
 168                                 rtnl_unlock();
 169                                 goto out;
 170                         }
 171
 172                 printk(KERN_ERR DRV_NAME
 173                         ": unable to delete non-existent bond %s\n", ifname);
 174                 res = -ENODEV;
 175                 goto out;
 176         }
 177
 178 err_no_cmd:
 179         printk(KERN_ERR DRV_NAME
 180                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 181         res = -EPERM;
 182
 183         /* Always return either count or an error.  If you return 0, you'll
 184          * get called forever, which is bad.
 185          */
 186 out:
 187         up_write(&(bonding_rwsem));
 188         return res;
 189 }
 190 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 191 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 192                   bonding_show_bonds, bonding_store_bonds);
 193
 194 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 195 {
 196         char linkname[IFNAMSIZ+7];
 197         int ret = 0;
 198
 199         /* first, create a link from the slave back to the master */
 200         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 201                                 "master");
 202         if (ret)
 203                 return ret;
 204         /* next, create a link from the master to the slave */
 205         sprintf(linkname,"slave_%s",slave->name);
 206         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 207                                 linkname);
 208         return ret;
 209
 210 }
 211
 212 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 213 {
 214         char linkname[IFNAMSIZ+7];
 215
 216         sysfs_remove_link(&(slave->dev.kobj), "master");
 217         sprintf(linkname,"slave_%s",slave->name);
 218         sysfs_remove_link(&(master->dev.kobj), linkname);
 219 }
 220
 221
 222 /*
 223  * Show the slaves in the current bond.
 224  */
 225 static ssize_t bonding_show_slaves(struct device *d,
 226                                    struct device_attribute *attr, char *buf)
 227 {
 228         struct slave *slave;
 229         int i, res = 0;
 230         struct bonding *bond = to_bond(d);
 231
 232         read_lock_bh(&bond->lock);
 233         bond_for_each_slave(bond, slave, i) {
 234                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 235                         /* not enough space for another interface name */
 236                         if ((PAGE_SIZE - res) > 10)
 237                                 res = PAGE_SIZE - 10;
 238                         res += sprintf(buf + res, "++more++");
 239                         break;
 240                 }
 241                 res += sprintf(buf + res, "%s ", slave->dev->name);
 242         }
 243         read_unlock_bh(&bond->lock);
 244         res += sprintf(buf + res, "\n");
 245         res++;
 246         return res;
 247 }
 248
 249 /*
 250  * Set the slaves in the current bond.  The bond interface must be
 251  * up for this to succeed.
 252  * This function is largely the same flow as bonding_update_bonds().
 253  */
 254 static ssize_t bonding_store_slaves(struct device *d,
 255                                     struct device_attribute *attr,
 256                                     const char *buffer, size_t count)
 257 {
 258         char command[IFNAMSIZ + 1] = { 0, };
 259         char *ifname;
 260         int i, res, found, ret = count;
 261         u32 original_mtu;
 262         struct slave *slave;
 263         struct net_device *dev = NULL;
 264         struct bonding *bond = to_bond(d);
 265
 266         /* Quick sanity check -- is the bond interface up? */
 267         if (!(bond->dev->flags & IFF_UP)) {
 268                 printk(KERN_WARNING DRV_NAME
 269                        ": %s: doing slave updates when interface is down.\n",
 270                        bond->dev->name);
 271         }
 272
 273         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 274
 275         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 276         ifname = command + 1;
 277         if ((strlen(command) <= 1) ||
 278             !dev_valid_name(ifname))
 279                 goto err_no_cmd;
 280
 281         if (command[0] == '+') {
 282
 283                 /* Got a slave name in ifname.  Is it already in the list? */
 284                 found = 0;
 285                 read_lock_bh(&bond->lock);
 286                 bond_for_each_slave(bond, slave, i)
 287                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 288                                 printk(KERN_ERR DRV_NAME
 289                                        ": %s: Interface %s is already enslaved!\n",
 290                                        bond->dev->name, ifname);
 291                                 ret = -EPERM;
 292                                 read_unlock_bh(&bond->lock);
 293                                 goto out;
 294                         }
 295
 296                 read_unlock_bh(&bond->lock);
 297                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 298                        bond->dev->name, ifname);
 299                 dev = dev_get_by_name(&init_net, ifname);
 300                 if (!dev) {
 301                         printk(KERN_INFO DRV_NAME
 302                                ": %s: Interface %s does not exist!\n",
 303                                bond->dev->name, ifname);
 304                         ret = -EPERM;
 305                         goto out;
 306                 }
 307                 else
 308                         dev_put(dev);
 309
 310                 if (dev->flags & IFF_UP) {
 311                         printk(KERN_ERR DRV_NAME
 312                                ": %s: Error: Unable to enslave %s "
 313                                "because it is already up.\n",
 314                                bond->dev->name, dev->name);
 315                         ret = -EPERM;
 316                         goto out;
 317                 }
 318                 /* If this is the first slave, then we need to set
 319                    the master's hardware address to be the same as the
 320                    slave's. */
 321                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 322                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 323                                dev->addr_len);
 324                 }
 325
 326                 /* Set the slave's MTU to match the bond */
 327                 original_mtu = dev->mtu;
 328                 if (dev->mtu != bond->dev->mtu) {
 329                         if (dev->change_mtu) {
 330                                 res = dev->change_mtu(dev,
 331                                                       bond->dev->mtu);
 332                                 if (res) {
 333                                         ret = res;
 334                                         goto out;
 335                                 }
 336                         } else {
 337                                 dev->mtu = bond->dev->mtu;
 338                         }
 339                 }
 340                 rtnl_lock();
 341                 res = bond_enslave(bond->dev, dev);
 342                 bond_for_each_slave(bond, slave, i)
 343                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 344                                 slave->original_mtu = original_mtu;
 345                 rtnl_unlock();
 346                 if (res) {
 347                         ret = res;
 348                 }
 349                 goto out;
 350         }
 351
 352         if (command[0] == '-') {
 353                 dev = NULL;
 354                 bond_for_each_slave(bond, slave, i)
 355                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 356                                 dev = slave->dev;
 357                                 original_mtu = slave->original_mtu;
 358                                 break;
 359                         }
 360                 if (dev) {
 361                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 362                                 bond->dev->name, dev->name);
 363                         rtnl_lock();
 364                         if (bond->setup_by_slave)
 365                                 res = bond_release_and_destroy(bond->dev, dev);
 366                         else
 367                                 res = bond_release(bond->dev, dev);
 368                         rtnl_unlock();
 369                         if (res) {
 370                                 ret = res;
 371                                 goto out;
 372                         }
 373                         /* set the slave MTU to the default */
 374                         if (dev->change_mtu) {
 375                                 dev->change_mtu(dev, original_mtu);
 376                         } else {
 377                                 dev->mtu = original_mtu;
 378                         }
 379                 }
 380                 else {
 381                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 382                                 ifname, bond->dev->name);
 383                         ret = -ENODEV;
 384                 }
 385                 goto out;
 386         }
 387
 388 err_no_cmd:
 389         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 390         ret = -EPERM;
 391
 392 out:
 393         return ret;
 394 }
 395
 396 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 397
 398 /*
 399  * Show and set the bonding mode.  The bond interface must be down to
 400  * change the mode.
 401  */
 402 static ssize_t bonding_show_mode(struct device *d,
 403                                  struct device_attribute *attr, char *buf)
 404 {
 405         struct bonding *bond = to_bond(d);
 406
 407         return sprintf(buf, "%s %d\n",
 408                         bond_mode_tbl[bond->params.mode].modename,
 409                         bond->params.mode) + 1;
 410 }
 411
 412 static ssize_t bonding_store_mode(struct device *d,
 413                                   struct device_attribute *attr,
 414                                   const char *buf, size_t count)
 415 {
 416         int new_value, ret = count;
 417         struct bonding *bond = to_bond(d);
 418
 419         if (bond->dev->flags & IFF_UP) {
 420                 printk(KERN_ERR DRV_NAME
 421                        ": unable to update mode of %s because interface is up.\n",
 422                        bond->dev->name);
 423                 ret = -EPERM;
 424                 goto out;
 425         }
 426
 427         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 428         if (new_value < 0)  {
 429                 printk(KERN_ERR DRV_NAME
 430                        ": %s: Ignoring invalid mode value %.*s.\n",
 431                        bond->dev->name,
 432                        (int)strlen(buf) - 1, buf);
 433                 ret = -EINVAL;
 434                 goto out;
 435         } else {
 436                 if (bond->params.mode == BOND_MODE_8023AD)
 437                         bond_unset_master_3ad_flags(bond);
 438
 439                 if (bond->params.mode == BOND_MODE_ALB)
 440                         bond_unset_master_alb_flags(bond);
 441
 442                 bond->params.mode = new_value;
 443                 bond_set_mode_ops(bond, bond->params.mode);
 444                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 445                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 446         }
 447 out:
 448         return ret;
 449 }
 450 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 451
 452 /*
 453  * Show and set the bonding transmit hash method.  The bond interface must be down to
 454  * change the xmit hash policy.
 455  */
 456 static ssize_t bonding_show_xmit_hash(struct device *d,
 457                                       struct device_attribute *attr,
 458                                       char *buf)
 459 {
 460         int count;
 461         struct bonding *bond = to_bond(d);
 462
 463         if ((bond->params.mode != BOND_MODE_XOR) &&
 464             (bond->params.mode != BOND_MODE_8023AD)) {
 465                 // Not Applicable
 466                 count = sprintf(buf, "NA\n") + 1;
 467         } else {
 468                 count = sprintf(buf, "%s %d\n",
 469                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 470                         bond->params.xmit_policy) + 1;
 471         }
 472
 473         return count;
 474 }
 475
 476 static ssize_t bonding_store_xmit_hash(struct device *d,
 477                                        struct device_attribute *attr,
 478                                        const char *buf, size_t count)
 479 {
 480         int new_value, ret = count;
 481         struct bonding *bond = to_bond(d);
 482
 483         if (bond->dev->flags & IFF_UP) {
 484                 printk(KERN_ERR DRV_NAME
 485                        "%s: Interface is up. Unable to update xmit policy.\n",
 486                        bond->dev->name);
 487                 ret = -EPERM;
 488                 goto out;
 489         }
 490
 491         if ((bond->params.mode != BOND_MODE_XOR) &&
 492             (bond->params.mode != BOND_MODE_8023AD)) {
 493                 printk(KERN_ERR DRV_NAME
 494                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 495                        bond->dev->name);
 496                 ret = -EPERM;
 497                 goto out;
 498         }
 499
 500         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 501         if (new_value < 0)  {
 502                 printk(KERN_ERR DRV_NAME
 503                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 504                        bond->dev->name,
 505                        (int)strlen(buf) - 1, buf);
 506                 ret = -EINVAL;
 507                 goto out;
 508         } else {
 509                 bond->params.xmit_policy = new_value;
 510                 bond_set_mode_ops(bond, bond->params.mode);
 511                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 512                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 513         }
 514 out:
 515         return ret;
 516 }
 517 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 518
 519 /*
 520  * Show and set arp_validate.
 521  */
 522 static ssize_t bonding_show_arp_validate(struct device *d,
 523                                          struct device_attribute *attr,
 524                                          char *buf)
 525 {
 526         struct bonding *bond = to_bond(d);
 527
 528         return sprintf(buf, "%s %d\n",
 529                        arp_validate_tbl[bond->params.arp_validate].modename,
 530                        bond->params.arp_validate) + 1;
 531 }
 532
 533 static ssize_t bonding_store_arp_validate(struct device *d,
 534                                           struct device_attribute *attr,
 535                                           const char *buf, size_t count)
 536 {
 537         int new_value;
 538         struct bonding *bond = to_bond(d);
 539
 540         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
 541         if (new_value < 0) {
 542                 printk(KERN_ERR DRV_NAME
 543                        ": %s: Ignoring invalid arp_validate value %s\n",
 544                        bond->dev->name, buf);
 545                 return -EINVAL;
 546         }
 547         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 548                 printk(KERN_ERR DRV_NAME
 549                        ": %s: arp_validate only supported in active-backup mode.\n",
 550                        bond->dev->name);
 551                 return -EINVAL;
 552         }
 553         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 554                bond->dev->name, arp_validate_tbl[new_value].modename,
 555                new_value);
 556
 557         if (!bond->params.arp_validate && new_value) {
 558                 bond_register_arp(bond);
 559         } else if (bond->params.arp_validate && !new_value) {
 560                 bond_unregister_arp(bond);
 561         }
 562
 563         bond->params.arp_validate = new_value;
 564
 565         return count;
 566 }
 567
 568 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 569
 570 /*
 571  * Show and set the arp timer interval.  There are two tricky bits
 572  * here.  First, if ARP monitoring is activated, then we must disable
 573  * MII monitoring.  Second, if the ARP timer isn't running, we must
 574  * start it.
 575  */
 576 static ssize_t bonding_show_arp_interval(struct device *d,
 577                                          struct device_attribute *attr,
 578                                          char *buf)
 579 {
 580         struct bonding *bond = to_bond(d);
 581
 582         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 583 }
 584
 585 static ssize_t bonding_store_arp_interval(struct device *d,
 586                                           struct device_attribute *attr,
 587                                           const char *buf, size_t count)
 588 {
 589         int new_value, ret = count;
 590         struct bonding *bond = to_bond(d);
 591
 592         if (sscanf(buf, "%d", &new_value) != 1) {
 593                 printk(KERN_ERR DRV_NAME
 594                        ": %s: no arp_interval value specified.\n",
 595                        bond->dev->name);
 596                 ret = -EINVAL;
 597                 goto out;
 598         }
 599         if (new_value < 0) {
 600                 printk(KERN_ERR DRV_NAME
 601                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 602                        bond->dev->name, new_value, INT_MAX);
 603                 ret = -EINVAL;
 604                 goto out;
 605         }
 606
 607         printk(KERN_INFO DRV_NAME
 608                ": %s: Setting ARP monitoring interval to %d.\n",
 609                bond->dev->name, new_value);
 610         bond->params.arp_interval = new_value;
 611         if (bond->params.miimon) {
 612                 printk(KERN_INFO DRV_NAME
 613                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 614                        "%s Disabling MII monitoring.\n",
 615                        bond->dev->name, bond->dev->name);
 616                 bond->params.miimon = 0;
 617                 /* Kill MII timer, else it brings bond's link down */
 618                 if (bond->arp_timer.function) {
 619                         printk(KERN_INFO DRV_NAME
 620                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 621                        bond->dev->name);
 622                         del_timer_sync(&bond->mii_timer);
 623                 }
 624         }
 625         if (!bond->params.arp_targets[0]) {
 626                 printk(KERN_INFO DRV_NAME
 627                        ": %s: ARP monitoring has been set up, "
 628                        "but no ARP targets have been specified.\n",
 629                        bond->dev->name);
 630         }
 631         if (bond->dev->flags & IFF_UP) {
 632                 /* If the interface is up, we may need to fire off
 633                  * the ARP timer.  If the interface is down, the
 634                  * timer will get fired off when the open function
 635                  * is called.
 636                  */
 637                 if (bond->arp_timer.function) {
 638                         /* The timer's already set up, so fire it off */
 639                         mod_timer(&bond->arp_timer, jiffies + 1);
 640                 } else {
 641                         /* Set up the timer. */
 642                         init_timer(&bond->arp_timer);
 643                         bond->arp_timer.expires = jiffies + 1;
 644                         bond->arp_timer.data =
 645                                 (unsigned long) bond->dev;
 646                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 647                                 bond->arp_timer.function =
 648                                         (void *)
 649                                         &bond_activebackup_arp_mon;
 650                         } else {
 651                                 bond->arp_timer.function =
 652                                         (void *)
 653                                         &bond_loadbalance_arp_mon;
 654                         }
 655                         add_timer(&bond->arp_timer);
 656                 }
 657         }
 658
 659 out:
 660         return ret;
 661 }
 662 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 663
 664 /*
 665  * Show and set the arp targets.
 666  */
 667 static ssize_t bonding_show_arp_targets(struct device *d,
 668                                         struct device_attribute *attr,
 669                                         char *buf)
 670 {
 671         int i, res = 0;
 672         struct bonding *bond = to_bond(d);
 673
 674         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 675                 if (bond->params.arp_targets[i])
 676                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 677                                NIPQUAD(bond->params.arp_targets[i]));
 678         }
 679         if (res)
 680                 res--;  /* eat the leftover space */
 681         res += sprintf(buf + res, "\n");
 682         res++;
 683         return res;
 684 }
 685
 686 static ssize_t bonding_store_arp_targets(struct device *d,
 687                                          struct device_attribute *attr,
 688                                          const char *buf, size_t count)
 689 {
 690         __be32 newtarget;
 691         int i = 0, done = 0, ret = count;
 692         struct bonding *bond = to_bond(d);
 693         __be32 *targets;
 694
 695         targets = bond->params.arp_targets;
 696         newtarget = in_aton(buf + 1);
 697         /* look for adds */
 698         if (buf[0] == '+') {
 699                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 700                         printk(KERN_ERR DRV_NAME
 701                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 702                                bond->dev->name, NIPQUAD(newtarget));
 703                         ret = -EINVAL;
 704                         goto out;
 705                 }
 706                 /* look for an empty slot to put the target in, and check for dupes */
 707                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 708                         if (targets[i] == newtarget) { /* duplicate */
 709                                 printk(KERN_ERR DRV_NAME
 710                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 711                                        bond->dev->name, NIPQUAD(newtarget));
 712                                 if (done)
 713                                         targets[i] = 0;
 714                                 ret = -EINVAL;
 715                                 goto out;
 716                         }
 717                         if (targets[i] == 0 && !done) {
 718                                 printk(KERN_INFO DRV_NAME
 719                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 720                                        bond->dev->name, NIPQUAD(newtarget));
 721                                 done = 1;
 722                                 targets[i] = newtarget;
 723                         }
 724                 }
 725                 if (!done) {
 726                         printk(KERN_ERR DRV_NAME
 727                                ": %s: ARP target table is full!\n",
 728                                bond->dev->name);
 729                         ret = -EINVAL;
 730                         goto out;
 731                 }
 732
 733         }
 734         else if (buf[0] == '-') {
 735                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 736                         printk(KERN_ERR DRV_NAME
 737                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 738                                bond->dev->name, NIPQUAD(newtarget));
 739                         ret = -EINVAL;
 740                         goto out;
 741                 }
 742
 743                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 744                         if (targets[i] == newtarget) {
 745                                 printk(KERN_INFO DRV_NAME
 746                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 747                                        bond->dev->name, NIPQUAD(newtarget));
 748                                 targets[i] = 0;
 749                                 done = 1;
 750                         }
 751                 }
 752                 if (!done) {
 753                         printk(KERN_INFO DRV_NAME
 754                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 755                                bond->dev->name, NIPQUAD(newtarget));
 756                         ret = -EINVAL;
 757                         goto out;
 758                 }
 759         }
 760         else {
 761                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 762                         bond->dev->name);
 763                 ret = -EPERM;
 764                 goto out;
 765         }
 766
 767 out:
 768         return ret;
 769 }
 770 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 771
 772 /*
 773  * Show and set the up and down delays.  These must be multiples of the
 774  * MII monitoring value, and are stored internally as the multiplier.
 775  * Thus, we must translate to MS for the real world.
 776  */
 777 static ssize_t bonding_show_downdelay(struct device *d,
 778                                       struct device_attribute *attr,
 779                                       char *buf)
 780 {
 781         struct bonding *bond = to_bond(d);
 782
 783         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 784 }
 785
 786 static ssize_t bonding_store_downdelay(struct device *d,
 787                                        struct device_attribute *attr,
 788                                        const char *buf, size_t count)
 789 {
 790         int new_value, ret = count;
 791         struct bonding *bond = to_bond(d);
 792
 793         if (!(bond->params.miimon)) {
 794                 printk(KERN_ERR DRV_NAME
 795                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 796                        bond->dev->name);
 797                 ret = -EPERM;
 798                 goto out;
 799         }
 800
 801         if (sscanf(buf, "%d", &new_value) != 1) {
 802                 printk(KERN_ERR DRV_NAME
 803                        ": %s: no down delay value specified.\n",
 804                        bond->dev->name);
 805                 ret = -EINVAL;
 806                 goto out;
 807         }
 808         if (new_value < 0) {
 809                 printk(KERN_ERR DRV_NAME
 810                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 811                        bond->dev->name, new_value, 1, INT_MAX);
 812                 ret = -EINVAL;
 813                 goto out;
 814         } else {
 815                 if ((new_value % bond->params.miimon) != 0) {
 816                         printk(KERN_WARNING DRV_NAME
 817                                ": %s: Warning: down delay (%d) is not a multiple "
 818                                "of miimon (%d), delay rounded to %d ms\n",
 819                                bond->dev->name, new_value, bond->params.miimon,
 820                                (new_value / bond->params.miimon) *
 821                                bond->params.miimon);
 822                 }
 823                 bond->params.downdelay = new_value / bond->params.miimon;
 824                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 825                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 826
 827         }
 828
 829 out:
 830         return ret;
 831 }
 832 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 833
 834 static ssize_t bonding_show_updelay(struct device *d,
 835                                     struct device_attribute *attr,
 836                                     char *buf)
 837 {
 838         struct bonding *bond = to_bond(d);
 839
 840         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 841
 842 }
 843
 844 static ssize_t bonding_store_updelay(struct device *d,
 845                                      struct device_attribute *attr,
 846                                      const char *buf, size_t count)
 847 {
 848         int new_value, ret = count;
 849         struct bonding *bond = to_bond(d);
 850
 851         if (!(bond->params.miimon)) {
 852                 printk(KERN_ERR DRV_NAME
 853                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 854                        bond->dev->name);
 855                 ret = -EPERM;
 856                 goto out;
 857         }
 858
 859         if (sscanf(buf, "%d", &new_value) != 1) {
 860                 printk(KERN_ERR DRV_NAME
 861                        ": %s: no up delay value specified.\n",
 862                        bond->dev->name);
 863                 ret = -EINVAL;
 864                 goto out;
 865         }
 866         if (new_value < 0) {
 867                 printk(KERN_ERR DRV_NAME
 868                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 869                        bond->dev->name, new_value, 1, INT_MAX);
 870                 ret = -EINVAL;
 871                 goto out;
 872         } else {
 873                 if ((new_value % bond->params.miimon) != 0) {
 874                         printk(KERN_WARNING DRV_NAME
 875                                ": %s: Warning: up delay (%d) is not a multiple "
 876                                "of miimon (%d), updelay rounded to %d ms\n",
 877                                bond->dev->name, new_value, bond->params.miimon,
 878                                (new_value / bond->params.miimon) *
 879                                bond->params.miimon);
 880                 }
 881                 bond->params.updelay = new_value / bond->params.miimon;
 882                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 883                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 884
 885         }
 886
 887 out:
 888         return ret;
 889 }
 890 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 891
 892 /*
 893  * Show and set the LACP interval.  Interface must be down, and the mode
 894  * must be set to 802.3ad mode.
 895  */
 896 static ssize_t bonding_show_lacp(struct device *d,
 897                                  struct device_attribute *attr,
 898                                  char *buf)
 899 {
 900         struct bonding *bond = to_bond(d);
 901
 902         return sprintf(buf, "%s %d\n",
 903                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 904                 bond->params.lacp_fast) + 1;
 905 }
 906
 907 static ssize_t bonding_store_lacp(struct device *d,
 908                                   struct device_attribute *attr,
 909                                   const char *buf, size_t count)
 910 {
 911         int new_value, ret = count;
 912         struct bonding *bond = to_bond(d);
 913
 914         if (bond->dev->flags & IFF_UP) {
 915                 printk(KERN_ERR DRV_NAME
 916                        ": %s: Unable to update LACP rate because interface is up.\n",
 917                        bond->dev->name);
 918                 ret = -EPERM;
 919                 goto out;
 920         }
 921
 922         if (bond->params.mode != BOND_MODE_8023AD) {
 923                 printk(KERN_ERR DRV_NAME
 924                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 925                        bond->dev->name);
 926                 ret = -EPERM;
 927                 goto out;
 928         }
 929
 930         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 931
 932         if ((new_value == 1) || (new_value == 0)) {
 933                 bond->params.lacp_fast = new_value;
 934                 printk(KERN_INFO DRV_NAME
 935                        ": %s: Setting LACP rate to %s (%d).\n",
 936                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 937         } else {
 938                 printk(KERN_ERR DRV_NAME
 939                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 940                         bond->dev->name, (int)strlen(buf) - 1, buf);
 941                 ret = -EINVAL;
 942         }
 943 out:
 944         return ret;
 945 }
 946 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 947
 948 /*
 949  * Show and set the MII monitor interval.  There are two tricky bits
 950  * here.  First, if MII monitoring is activated, then we must disable
 951  * ARP monitoring.  Second, if the timer isn't running, we must
 952  * start it.
 953  */
 954 static ssize_t bonding_show_miimon(struct device *d,
 955                                    struct device_attribute *attr,
 956                                    char *buf)
 957 {
 958         struct bonding *bond = to_bond(d);
 959
 960         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 961 }
 962
 963 static ssize_t bonding_store_miimon(struct device *d,
 964                                     struct device_attribute *attr,
 965                                     const char *buf, size_t count)
 966 {
 967         int new_value, ret = count;
 968         struct bonding *bond = to_bond(d);
 969
 970         if (sscanf(buf, "%d", &new_value) != 1) {
 971                 printk(KERN_ERR DRV_NAME
 972                        ": %s: no miimon value specified.\n",
 973                        bond->dev->name);
 974                 ret = -EINVAL;
 975                 goto out;
 976         }
 977         if (new_value < 0) {
 978                 printk(KERN_ERR DRV_NAME
 979                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 980                        bond->dev->name, new_value, 1, INT_MAX);
 981                 ret = -EINVAL;
 982                 goto out;
 983         } else {
 984                 printk(KERN_INFO DRV_NAME
 985                        ": %s: Setting MII monitoring interval to %d.\n",
 986                        bond->dev->name, new_value);
 987                 bond->params.miimon = new_value;
 988                 if(bond->params.updelay)
 989                         printk(KERN_INFO DRV_NAME
 990                               ": %s: Note: Updating updelay (to %d) "
 991                               "since it is a multiple of the miimon value.\n",
 992                               bond->dev->name,
 993                               bond->params.updelay * bond->params.miimon);
 994                 if(bond->params.downdelay)
 995                         printk(KERN_INFO DRV_NAME
 996                               ": %s: Note: Updating downdelay (to %d) "
 997                               "since it is a multiple of the miimon value.\n",
 998                               bond->dev->name,
 999                               bond->params.downdelay * bond->params.miimon);
1000                 if (bond->params.arp_interval) {
1001                         printk(KERN_INFO DRV_NAME
1002                                ": %s: MII monitoring cannot be used with "
1003                                "ARP monitoring. Disabling ARP monitoring...\n",
1004                                bond->dev->name);
1005                         bond->params.arp_interval = 0;
1006                         if (bond->params.arp_validate) {
1007                                 bond_unregister_arp(bond);
1008                                 bond->params.arp_validate =
1009                                         BOND_ARP_VALIDATE_NONE;
1010                         }
1011                         /* Kill ARP timer, else it brings bond's link down */
1012                         if (bond->mii_timer.function) {
1013                                 printk(KERN_INFO DRV_NAME
1014                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
1015                                bond->dev->name);
1016                                 del_timer_sync(&bond->arp_timer);
1017                         }
1018                 }
1019
1020                 if (bond->dev->flags & IFF_UP) {
1021                         /* If the interface is up, we may need to fire off
1022                          * the MII timer. If the interface is down, the
1023                          * timer will get fired off when the open function
1024                          * is called.
1025                          */
1026                         if (bond->mii_timer.function) {
1027                                 /* The timer's already set up, so fire it off */
1028                                 mod_timer(&bond->mii_timer, jiffies + 1);
1029                         } else {
1030                                 /* Set up the timer. */
1031                                 init_timer(&bond->mii_timer);
1032                                 bond->mii_timer.expires = jiffies + 1;
1033                                 bond->mii_timer.data =
1034                                         (unsigned long) bond->dev;
1035                                 bond->mii_timer.function =
1036                                         (void *) &bond_mii_monitor;
1037                                 add_timer(&bond->mii_timer);
1038                         }
1039                 }
1040         }
1041 out:
1042         return ret;
1043 }
1044 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1045
1046 /*
1047  * Show and set the primary slave.  The store function is much
1048  * simpler than bonding_store_slaves function because it only needs to
1049  * handle one interface name.
1050  * The bond must be a mode that supports a primary for this be
1051  * set.
1052  */
1053 static ssize_t bonding_show_primary(struct device *d,
1054                                     struct device_attribute *attr,
1055                                     char *buf)
1056 {
1057         int count = 0;
1058         struct bonding *bond = to_bond(d);
1059
1060         if (bond->primary_slave)
1061                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
1062         else
1063                 count = sprintf(buf, "\n") + 1;
1064
1065         return count;
1066 }
1067
1068 static ssize_t bonding_store_primary(struct device *d,
1069                                      struct device_attribute *attr,
1070                                      const char *buf, size_t count)
1071 {
1072         int i;
1073         struct slave *slave;
1074         struct bonding *bond = to_bond(d);
1075
1076         write_lock_bh(&bond->lock);
1077         if (!USES_PRIMARY(bond->params.mode)) {
1078                 printk(KERN_INFO DRV_NAME
1079                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1080                        bond->dev->name, bond->dev->name, bond->params.mode);
1081         } else {
1082                 bond_for_each_slave(bond, slave, i) {
1083                         if (strnicmp
1084                             (slave->dev->name, buf,
1085                              strlen(slave->dev->name)) == 0) {
1086                                 printk(KERN_INFO DRV_NAME
1087                                        ": %s: Setting %s as primary slave.\n",
1088                                        bond->dev->name, slave->dev->name);
1089                                 bond->primary_slave = slave;
1090                                 bond_select_active_slave(bond);
1091                                 goto out;
1092                         }
1093                 }
1094
1095                 /* if we got here, then we didn't match the name of any slave */
1096
1097                 if (strlen(buf) == 0 || buf[0] == '\n') {
1098                         printk(KERN_INFO DRV_NAME
1099                                ": %s: Setting primary slave to None.\n",
1100                                bond->dev->name);
1101                         bond->primary_slave = NULL;
1102                                 bond_select_active_slave(bond);
1103                 } else {
1104                         printk(KERN_INFO DRV_NAME
1105                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1106                                bond->dev->name, (int)strlen(buf) - 1, buf);
1107                 }
1108         }
1109 out:
1110         write_unlock_bh(&bond->lock);
1111         return count;
1112 }
1113 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1114
1115 /*
1116  * Show and set the use_carrier flag.
1117  */
1118 static ssize_t bonding_show_carrier(struct device *d,
1119                                     struct device_attribute *attr,
1120                                     char *buf)
1121 {
1122         struct bonding *bond = to_bond(d);
1123
1124         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1125 }
1126
1127 static ssize_t bonding_store_carrier(struct device *d,
1128                                      struct device_attribute *attr,
1129                                      const char *buf, size_t count)
1130 {
1131         int new_value, ret = count;
1132         struct bonding *bond = to_bond(d);
1133
1134
1135         if (sscanf(buf, "%d", &new_value) != 1) {
1136                 printk(KERN_ERR DRV_NAME
1137                        ": %s: no use_carrier value specified.\n",
1138                        bond->dev->name);
1139                 ret = -EINVAL;
1140                 goto out;
1141         }
1142         if ((new_value == 0) || (new_value == 1)) {
1143                 bond->params.use_carrier = new_value;
1144                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1145                        bond->dev->name, new_value);
1146         } else {
1147                 printk(KERN_INFO DRV_NAME
1148                        ": %s: Ignoring invalid use_carrier value %d.\n",
1149                        bond->dev->name, new_value);
1150         }
1151 out:
1152         return count;
1153 }
1154 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1155
1156
1157 /*
1158  * Show and set currently active_slave.
1159  */
1160 static ssize_t bonding_show_active_slave(struct device *d,
1161                                          struct device_attribute *attr,
1162                                          char *buf)
1163 {
1164         struct slave *curr;
1165         struct bonding *bond = to_bond(d);
1166         int count;
1167
1168
1169         read_lock(&bond->curr_slave_lock);
1170         curr = bond->curr_active_slave;
1171         read_unlock(&bond->curr_slave_lock);
1172
1173         if (USES_PRIMARY(bond->params.mode) && curr)
1174                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1175         else
1176                 count = sprintf(buf, "\n") + 1;
1177         return count;
1178 }
1179
1180 static ssize_t bonding_store_active_slave(struct device *d,
1181                                           struct device_attribute *attr,
1182                                           const char *buf, size_t count)
1183 {
1184         int i;
1185         struct slave *slave;
1186         struct slave *old_active = NULL;
1187         struct slave *new_active = NULL;
1188         struct bonding *bond = to_bond(d);
1189
1190         write_lock_bh(&bond->lock);
1191         if (!USES_PRIMARY(bond->params.mode)) {
1192                 printk(KERN_INFO DRV_NAME
1193                        ": %s: Unable to change active slave; %s is in mode %d\n",
1194                        bond->dev->name, bond->dev->name, bond->params.mode);
1195         } else {
1196                 bond_for_each_slave(bond, slave, i) {
1197                         if (strnicmp
1198                             (slave->dev->name, buf,
1199                              strlen(slave->dev->name)) == 0) {
1200                                 old_active = bond->curr_active_slave;
1201                                 new_active = slave;
1202                                 if (new_active == old_active) {
1203                                         /* do nothing */
1204                                         printk(KERN_INFO DRV_NAME
1205                                                ": %s: %s is already the current active slave.\n",
1206                                                bond->dev->name, slave->dev->name);
1207                                         goto out;
1208                                 }
1209                                 else {
1210                                         if ((new_active) &&
1211                                             (old_active) &&
1212                                             (new_active->link == BOND_LINK_UP) &&
1213                                             IS_UP(new_active->dev)) {
1214                                                 printk(KERN_INFO DRV_NAME
1215                                                       ": %s: Setting %s as active slave.\n",
1216                                                       bond->dev->name, slave->dev->name);
1217                                                 bond_change_active_slave(bond, new_active);
1218                                         }
1219                                         else {
1220                                                 printk(KERN_INFO DRV_NAME
1221                                                       ": %s: Could not set %s as active slave; "
1222                                                       "either %s is down or the link is down.\n",
1223                                                       bond->dev->name, slave->dev->name,
1224                                                       slave->dev->name);
1225                                         }
1226                                         goto out;
1227                                 }
1228                         }
1229                 }
1230
1231                 /* if we got here, then we didn't match the name of any slave */
1232
1233                 if (strlen(buf) == 0 || buf[0] == '\n') {
1234                         printk(KERN_INFO DRV_NAME
1235                                ": %s: Setting active slave to None.\n",
1236                                bond->dev->name);
1237                         bond->primary_slave = NULL;
1238                                 bond_select_active_slave(bond);
1239                 } else {
1240                         printk(KERN_INFO DRV_NAME
1241                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1242                                bond->dev->name, (int)strlen(buf) - 1, buf);
1243                 }
1244         }
1245 out:
1246         write_unlock_bh(&bond->lock);
1247         return count;
1248
1249 }
1250 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1251
1252
1253 /*
1254  * Show link status of the bond interface.
1255  */
1256 static ssize_t bonding_show_mii_status(struct device *d,
1257                                        struct device_attribute *attr,
1258                                        char *buf)
1259 {
1260         struct slave *curr;
1261         struct bonding *bond = to_bond(d);
1262
1263         read_lock(&bond->curr_slave_lock);
1264         curr = bond->curr_active_slave;
1265         read_unlock(&bond->curr_slave_lock);
1266
1267         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1268 }
1269 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1270
1271
1272 /*
1273  * Show current 802.3ad aggregator ID.
1274  */
1275 static ssize_t bonding_show_ad_aggregator(struct device *d,
1276                                           struct device_attribute *attr,
1277                                           char *buf)
1278 {
1279         int count = 0;
1280         struct bonding *bond = to_bond(d);
1281
1282         if (bond->params.mode == BOND_MODE_8023AD) {
1283                 struct ad_info ad_info;
1284                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1285         }
1286         else
1287                 count = sprintf(buf, "\n") + 1;
1288
1289         return count;
1290 }
1291 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1292
1293
1294 /*
1295  * Show number of active 802.3ad ports.
1296  */
1297 static ssize_t bonding_show_ad_num_ports(struct device *d,
1298                                          struct device_attribute *attr,
1299                                          char *buf)
1300 {
1301         int count = 0;
1302         struct bonding *bond = to_bond(d);
1303
1304         if (bond->params.mode == BOND_MODE_8023AD) {
1305                 struct ad_info ad_info;
1306                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1307         }
1308         else
1309                 count = sprintf(buf, "\n") + 1;
1310
1311         return count;
1312 }
1313 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1314
1315
1316 /*
1317  * Show current 802.3ad actor key.
1318  */
1319 static ssize_t bonding_show_ad_actor_key(struct device *d,
1320                                          struct device_attribute *attr,
1321                                          char *buf)
1322 {
1323         int count = 0;
1324         struct bonding *bond = to_bond(d);
1325
1326         if (bond->params.mode == BOND_MODE_8023AD) {
1327                 struct ad_info ad_info;
1328                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1329         }
1330         else
1331                 count = sprintf(buf, "\n") + 1;
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) + 1;
1351         }
1352         else
1353                 count = sprintf(buf, "\n") + 1;
1354
1355         return count;
1356 }
1357 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1358
1359
1360 /*
1361  * Show current 802.3ad partner mac.
1362  */
1363 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1364                                            struct device_attribute *attr,
1365                                            char *buf)
1366 {
1367         int count = 0;
1368         struct bonding *bond = to_bond(d);
1369         DECLARE_MAC_BUF(mac);
1370
1371         if (bond->params.mode == BOND_MODE_8023AD) {
1372                 struct ad_info ad_info;
1373                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1374                         count = sprintf(buf,"%s\n",
1375                                         print_mac(mac, ad_info.partner_system))
1376                                 + 1;
1377                 }
1378         }
1379         else
1380                 count = sprintf(buf, "\n") + 1;
1381
1382         return count;
1383 }
1384 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1385
1386
1387
1388 static struct attribute *per_bond_attrs[] = {
1389         &dev_attr_slaves.attr,
1390         &dev_attr_mode.attr,
1391         &dev_attr_arp_validate.attr,
1392         &dev_attr_arp_interval.attr,
1393         &dev_attr_arp_ip_target.attr,
1394         &dev_attr_downdelay.attr,
1395         &dev_attr_updelay.attr,
1396         &dev_attr_lacp_rate.attr,
1397         &dev_attr_xmit_hash_policy.attr,
1398         &dev_attr_miimon.attr,
1399         &dev_attr_primary.attr,
1400         &dev_attr_use_carrier.attr,
1401         &dev_attr_active_slave.attr,
1402         &dev_attr_mii_status.attr,
1403         &dev_attr_ad_aggregator.attr,
1404         &dev_attr_ad_num_ports.attr,
1405         &dev_attr_ad_actor_key.attr,
1406         &dev_attr_ad_partner_key.attr,
1407         &dev_attr_ad_partner_mac.attr,
1408         NULL,
1409 };
1410
1411 static struct attribute_group bonding_group = {
1412         .name = "bonding",
1413         .attrs = per_bond_attrs,
1414 };
1415
1416 /*
1417  * Initialize sysfs.  This sets up the bonding_masters file in
1418  * /sys/class/net.
1419  */
1420 int bond_create_sysfs(void)
1421 {
1422         int ret = 0;
1423         struct bonding *firstbond;
1424
1425         init_rwsem(&bonding_rwsem);
1426
1427         /* get the netdev class pointer */
1428         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1429         if (!firstbond)
1430                 return -ENODEV;
1431
1432         netdev_class = firstbond->dev->dev.class;
1433         if (!netdev_class)
1434                 return -ENODEV;
1435
1436         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1437         /*
1438          * Permit multiple loads of the module by ignoring failures to
1439          * create the bonding_masters sysfs file.  Bonding devices
1440          * created by second or subsequent loads of the module will
1441          * not be listed in, or controllable by, bonding_masters, but
1442          * will have the usual "bonding" sysfs directory.
1443          *
1444          * This is done to preserve backwards compatibility for
1445          * initscripts/sysconfig, which load bonding multiple times to
1446          * configure multiple bonding devices.
1447          */
1448         if (ret == -EEXIST) {
1449                 netdev_class = NULL;
1450                 return 0;
1451         }
1452
1453         return ret;
1454
1455 }
1456
1457 /*
1458  * Remove /sys/class/net/bonding_masters.
1459  */
1460 void bond_destroy_sysfs(void)
1461 {
1462         if (netdev_class)
1463                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1464 }
1465
1466 /*
1467  * Initialize sysfs for each bond.  This sets up and registers
1468  * the 'bondctl' directory for each individual bond under /sys/class/net.
1469  */
1470 int bond_create_sysfs_entry(struct bonding *bond)
1471 {
1472         struct net_device *dev = bond->dev;
1473         int err;
1474
1475         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1476         if (err) {
1477                 printk(KERN_EMERG "eek! didn't create group!\n");
1478         }
1479
1480         if (expected_refcount < 1)
1481                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1482
1483         return err;
1484 }
1485 /*
1486  * Remove sysfs entries for each bond.
1487  */
1488 void bond_destroy_sysfs_entry(struct bonding *bond)
1489 {
1490         struct net_device *dev = bond->dev;
1491
1492         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1493 }
1494