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 ad_select_tbl[];
  52 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  53 extern struct bond_parm_tbl arp_validate_tbl[];
  54 extern struct bond_parm_tbl fail_over_mac_tbl[];
  55
  56 static int expected_refcount = -1;
  57 /*--------------------------- Data Structures -----------------------------*/
  58
  59 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
  60  * Because kobject_register tries to acquire the subsystem lock.  If
  61  * we already hold the lock (which we would if the user was creating
  62  * a new bond through the sysfs interface), we deadlock.
  63  * This lock is only needed when deleting a bond - we need to make sure
  64  * that we don't collide with an ongoing ioctl.
  65  */
  66
  67 struct rw_semaphore bonding_rwsem;
  68
  69
  70
  71
  72 /*------------------------------ Functions --------------------------------*/
  73
  74 /*
  75  * "show" function for the bond_masters attribute.
  76  * The class parameter is ignored.
  77  */
  78 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
  79 {
  80         int res = 0;
  81         struct bonding *bond;
  82
  83         down_read(&(bonding_rwsem));
  84
  85         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  86                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  87                         /* not enough space for another interface name */
  88                         if ((PAGE_SIZE - res) > 10)
  89                                 res = PAGE_SIZE - 10;
  90                         res += sprintf(buf + res, "++more++ ");
  91                         break;
  92                 }
  93                 res += sprintf(buf + res, "%s ", bond->dev->name);
  94         }
  95         if (res)
  96                 buf[res-1] = '\n'; /* eat the leftover space */
  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 rv, res = count;
 114         struct bonding *bond;
 115
 116         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 117         ifname = command + 1;
 118         if ((strlen(command) <= 1) ||
 119             !dev_valid_name(ifname))
 120                 goto err_no_cmd;
 121
 122         if (command[0] == '+') {
 123                 printk(KERN_INFO DRV_NAME
 124                         ": %s is being created...\n", ifname);
 125                 rv = bond_create(ifname, &bonding_defaults);
 126                 if (rv) {
 127                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
 128                         res = rv;
 129                 }
 130                 goto out;
 131         }
 132
 133         if (command[0] == '-') {
 134                 rtnl_lock();
 135                 down_write(&bonding_rwsem);
 136
 137                 list_for_each_entry(bond, &bond_dev_list, bond_list)
 138                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 139                                 /* check the ref count on the bond's kobject.
 140                                  * If it's > expected, then there's a file open,
 141                                  * and we have to fail.
 142                                  */
 143                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 144                                                         > expected_refcount){
 145                                         printk(KERN_INFO DRV_NAME
 146                                                 ": Unable remove bond %s due to open references.\n",
 147                                                 ifname);
 148                                         res = -EPERM;
 149                                         goto out_unlock;
 150                                 }
 151                                 printk(KERN_INFO DRV_NAME
 152                                         ": %s is being deleted...\n",
 153                                         bond->dev->name);
 154                                 bond_destroy(bond);
 155                                 goto out_unlock;
 156                         }
 157
 158                 printk(KERN_ERR DRV_NAME
 159                         ": unable to delete non-existent bond %s\n", ifname);
 160                 res = -ENODEV;
 161                 goto out_unlock;
 162         }
 163
 164 err_no_cmd:
 165         printk(KERN_ERR DRV_NAME
 166                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 167         return -EPERM;
 168
 169 out_unlock:
 170         up_write(&bonding_rwsem);
 171         rtnl_unlock();
 172
 173         /* Always return either count or an error.  If you return 0, you'll
 174          * get called forever, which is bad.
 175          */
 176 out:
 177         return res;
 178 }
 179 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 180 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 181                   bonding_show_bonds, bonding_store_bonds);
 182
 183 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 184 {
 185         char linkname[IFNAMSIZ+7];
 186         int ret = 0;
 187
 188         /* first, create a link from the slave back to the master */
 189         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 190                                 "master");
 191         if (ret)
 192                 return ret;
 193         /* next, create a link from the master to the slave */
 194         sprintf(linkname,"slave_%s",slave->name);
 195         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 196                                 linkname);
 197         return ret;
 198
 199 }
 200
 201 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 202 {
 203         char linkname[IFNAMSIZ+7];
 204
 205         sysfs_remove_link(&(slave->dev.kobj), "master");
 206         sprintf(linkname,"slave_%s",slave->name);
 207         sysfs_remove_link(&(master->dev.kobj), linkname);
 208 }
 209
 210
 211 /*
 212  * Show the slaves in the current bond.
 213  */
 214 static ssize_t bonding_show_slaves(struct device *d,
 215                                    struct device_attribute *attr, char *buf)
 216 {
 217         struct slave *slave;
 218         int i, res = 0;
 219         struct bonding *bond = to_bond(d);
 220
 221         read_lock(&bond->lock);
 222         bond_for_each_slave(bond, slave, i) {
 223                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 224                         /* not enough space for another interface name */
 225                         if ((PAGE_SIZE - res) > 10)
 226                                 res = PAGE_SIZE - 10;
 227                         res += sprintf(buf + res, "++more++ ");
 228                         break;
 229                 }
 230                 res += sprintf(buf + res, "%s ", slave->dev->name);
 231         }
 232         read_unlock(&bond->lock);
 233         if (res)
 234                 buf[res-1] = '\n'; /* eat the leftover space */
 235         return res;
 236 }
 237
 238 /*
 239  * Set the slaves in the current bond.  The bond interface must be
 240  * up for this to succeed.
 241  * This function is largely the same flow as bonding_update_bonds().
 242  */
 243 static ssize_t bonding_store_slaves(struct device *d,
 244                                     struct device_attribute *attr,
 245                                     const char *buffer, size_t count)
 246 {
 247         char command[IFNAMSIZ + 1] = { 0, };
 248         char *ifname;
 249         int i, res, found, ret = count;
 250         u32 original_mtu;
 251         struct slave *slave;
 252         struct net_device *dev = NULL;
 253         struct bonding *bond = to_bond(d);
 254
 255         /* Quick sanity check -- is the bond interface up? */
 256         if (!(bond->dev->flags & IFF_UP)) {
 257                 printk(KERN_WARNING DRV_NAME
 258                        ": %s: doing slave updates when interface is down.\n",
 259                        bond->dev->name);
 260         }
 261
 262         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 263
 264         rtnl_lock();
 265         down_write(&(bonding_rwsem));
 266
 267         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 268         ifname = command + 1;
 269         if ((strlen(command) <= 1) ||
 270             !dev_valid_name(ifname))
 271                 goto err_no_cmd;
 272
 273         if (command[0] == '+') {
 274
 275                 /* Got a slave name in ifname.  Is it already in the list? */
 276                 found = 0;
 277                 read_lock(&bond->lock);
 278                 bond_for_each_slave(bond, slave, i)
 279                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 280                                 printk(KERN_ERR DRV_NAME
 281                                        ": %s: Interface %s is already enslaved!\n",
 282                                        bond->dev->name, ifname);
 283                                 ret = -EPERM;
 284                                 read_unlock(&bond->lock);
 285                                 goto out;
 286                         }
 287
 288                 read_unlock(&bond->lock);
 289                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 290                        bond->dev->name, ifname);
 291                 dev = dev_get_by_name(&init_net, ifname);
 292                 if (!dev) {
 293                         printk(KERN_INFO DRV_NAME
 294                                ": %s: Interface %s does not exist!\n",
 295                                bond->dev->name, ifname);
 296                         ret = -EPERM;
 297                         goto out;
 298                 }
 299                 else
 300                         dev_put(dev);
 301
 302                 if (dev->flags & IFF_UP) {
 303                         printk(KERN_ERR DRV_NAME
 304                                ": %s: Error: Unable to enslave %s "
 305                                "because it is already up.\n",
 306                                bond->dev->name, dev->name);
 307                         ret = -EPERM;
 308                         goto out;
 309                 }
 310                 /* If this is the first slave, then we need to set
 311                    the master's hardware address to be the same as the
 312                    slave's. */
 313                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 314                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 315                                dev->addr_len);
 316                 }
 317
 318                 /* Set the slave's MTU to match the bond */
 319                 original_mtu = dev->mtu;
 320                 if (dev->mtu != bond->dev->mtu) {
 321                         if (dev->change_mtu) {
 322                                 res = dev->change_mtu(dev,
 323                                                       bond->dev->mtu);
 324                                 if (res) {
 325                                         ret = res;
 326                                         goto out;
 327                                 }
 328                         } else {
 329                                 dev->mtu = bond->dev->mtu;
 330                         }
 331                 }
 332                 res = bond_enslave(bond->dev, dev);
 333                 bond_for_each_slave(bond, slave, i)
 334                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 335                                 slave->original_mtu = original_mtu;
 336                 if (res) {
 337                         ret = res;
 338                 }
 339                 goto out;
 340         }
 341
 342         if (command[0] == '-') {
 343                 dev = NULL;
 344                 original_mtu = 0;
 345                 bond_for_each_slave(bond, slave, i)
 346                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 347                                 dev = slave->dev;
 348                                 original_mtu = slave->original_mtu;
 349                                 break;
 350                         }
 351                 if (dev) {
 352                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 353                                 bond->dev->name, dev->name);
 354                                 res = bond_release(bond->dev, dev);
 355                         if (res) {
 356                                 ret = res;
 357                                 goto out;
 358                         }
 359                         /* set the slave MTU to the default */
 360                         if (dev->change_mtu) {
 361                                 dev->change_mtu(dev, original_mtu);
 362                         } else {
 363                                 dev->mtu = original_mtu;
 364                         }
 365                 }
 366                 else {
 367                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 368                                 ifname, bond->dev->name);
 369                         ret = -ENODEV;
 370                 }
 371                 goto out;
 372         }
 373
 374 err_no_cmd:
 375         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 376         ret = -EPERM;
 377
 378 out:
 379         up_write(&(bonding_rwsem));
 380         rtnl_unlock();
 381         return ret;
 382 }
 383
 384 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 385
 386 /*
 387  * Show and set the bonding mode.  The bond interface must be down to
 388  * change the mode.
 389  */
 390 static ssize_t bonding_show_mode(struct device *d,
 391                                  struct device_attribute *attr, char *buf)
 392 {
 393         struct bonding *bond = to_bond(d);
 394
 395         return sprintf(buf, "%s %d\n",
 396                         bond_mode_tbl[bond->params.mode].modename,
 397                         bond->params.mode);
 398 }
 399
 400 static ssize_t bonding_store_mode(struct device *d,
 401                                   struct device_attribute *attr,
 402                                   const char *buf, size_t count)
 403 {
 404         int new_value, ret = count;
 405         struct bonding *bond = to_bond(d);
 406
 407         if (bond->dev->flags & IFF_UP) {
 408                 printk(KERN_ERR DRV_NAME
 409                        ": unable to update mode of %s because interface is up.\n",
 410                        bond->dev->name);
 411                 ret = -EPERM;
 412                 goto out;
 413         }
 414
 415         new_value = bond_parse_parm(buf, bond_mode_tbl);
 416         if (new_value < 0)  {
 417                 printk(KERN_ERR DRV_NAME
 418                        ": %s: Ignoring invalid mode value %.*s.\n",
 419                        bond->dev->name,
 420                        (int)strlen(buf) - 1, buf);
 421                 ret = -EINVAL;
 422                 goto out;
 423         } else {
 424                 if (bond->params.mode == BOND_MODE_8023AD)
 425                         bond_unset_master_3ad_flags(bond);
 426
 427                 if (bond->params.mode == BOND_MODE_ALB)
 428                         bond_unset_master_alb_flags(bond);
 429
 430                 bond->params.mode = new_value;
 431                 bond_set_mode_ops(bond, bond->params.mode);
 432                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 433                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 434         }
 435 out:
 436         return ret;
 437 }
 438 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 439
 440 /*
 441  * Show and set the bonding transmit hash method.  The bond interface must be down to
 442  * change the xmit hash policy.
 443  */
 444 static ssize_t bonding_show_xmit_hash(struct device *d,
 445                                       struct device_attribute *attr,
 446                                       char *buf)
 447 {
 448         struct bonding *bond = to_bond(d);
 449
 450         return sprintf(buf, "%s %d\n",
 451                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 452                        bond->params.xmit_policy);
 453 }
 454
 455 static ssize_t bonding_store_xmit_hash(struct device *d,
 456                                        struct device_attribute *attr,
 457                                        const char *buf, size_t count)
 458 {
 459         int new_value, ret = count;
 460         struct bonding *bond = to_bond(d);
 461
 462         if (bond->dev->flags & IFF_UP) {
 463                 printk(KERN_ERR DRV_NAME
 464                        "%s: Interface is up. Unable to update xmit policy.\n",
 465                        bond->dev->name);
 466                 ret = -EPERM;
 467                 goto out;
 468         }
 469
 470         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 471         if (new_value < 0)  {
 472                 printk(KERN_ERR DRV_NAME
 473                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 474                        bond->dev->name,
 475                        (int)strlen(buf) - 1, buf);
 476                 ret = -EINVAL;
 477                 goto out;
 478         } else {
 479                 bond->params.xmit_policy = new_value;
 480                 bond_set_mode_ops(bond, bond->params.mode);
 481                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 482                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 483         }
 484 out:
 485         return ret;
 486 }
 487 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 488
 489 /*
 490  * Show and set arp_validate.
 491  */
 492 static ssize_t bonding_show_arp_validate(struct device *d,
 493                                          struct device_attribute *attr,
 494                                          char *buf)
 495 {
 496         struct bonding *bond = to_bond(d);
 497
 498         return sprintf(buf, "%s %d\n",
 499                        arp_validate_tbl[bond->params.arp_validate].modename,
 500                        bond->params.arp_validate);
 501 }
 502
 503 static ssize_t bonding_store_arp_validate(struct device *d,
 504                                           struct device_attribute *attr,
 505                                           const char *buf, size_t count)
 506 {
 507         int new_value;
 508         struct bonding *bond = to_bond(d);
 509
 510         new_value = bond_parse_parm(buf, arp_validate_tbl);
 511         if (new_value < 0) {
 512                 printk(KERN_ERR DRV_NAME
 513                        ": %s: Ignoring invalid arp_validate value %s\n",
 514                        bond->dev->name, buf);
 515                 return -EINVAL;
 516         }
 517         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 518                 printk(KERN_ERR DRV_NAME
 519                        ": %s: arp_validate only supported in active-backup mode.\n",
 520                        bond->dev->name);
 521                 return -EINVAL;
 522         }
 523         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 524                bond->dev->name, arp_validate_tbl[new_value].modename,
 525                new_value);
 526
 527         if (!bond->params.arp_validate && new_value) {
 528                 bond_register_arp(bond);
 529         } else if (bond->params.arp_validate && !new_value) {
 530                 bond_unregister_arp(bond);
 531         }
 532
 533         bond->params.arp_validate = new_value;
 534
 535         return count;
 536 }
 537
 538 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 539
 540 /*
 541  * Show and store fail_over_mac.  User only allowed to change the
 542  * value when there are no slaves.
 543  */
 544 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 545 {
 546         struct bonding *bond = to_bond(d);
 547
 548         return sprintf(buf, "%s %d\n",
 549                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 550                        bond->params.fail_over_mac);
 551 }
 552
 553 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 554 {
 555         int new_value;
 556         struct bonding *bond = to_bond(d);
 557
 558         if (bond->slave_cnt != 0) {
 559                 printk(KERN_ERR DRV_NAME
 560                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 561                        bond->dev->name);
 562                 return -EPERM;
 563         }
 564
 565         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 566         if (new_value < 0) {
 567                 printk(KERN_ERR DRV_NAME
 568                        ": %s: Ignoring invalid fail_over_mac value %s.\n",
 569                        bond->dev->name, buf);
 570                 return -EINVAL;
 571         }
 572
 573         bond->params.fail_over_mac = new_value;
 574         printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
 575                bond->dev->name, fail_over_mac_tbl[new_value].modename,
 576                new_value);
 577
 578         return count;
 579 }
 580
 581 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 582
 583 /*
 584  * Show and set the arp timer interval.  There are two tricky bits
 585  * here.  First, if ARP monitoring is activated, then we must disable
 586  * MII monitoring.  Second, if the ARP timer isn't running, we must
 587  * start it.
 588  */
 589 static ssize_t bonding_show_arp_interval(struct device *d,
 590                                          struct device_attribute *attr,
 591                                          char *buf)
 592 {
 593         struct bonding *bond = to_bond(d);
 594
 595         return sprintf(buf, "%d\n", bond->params.arp_interval);
 596 }
 597
 598 static ssize_t bonding_store_arp_interval(struct device *d,
 599                                           struct device_attribute *attr,
 600                                           const char *buf, size_t count)
 601 {
 602         int new_value, ret = count;
 603         struct bonding *bond = to_bond(d);
 604
 605         if (sscanf(buf, "%d", &new_value) != 1) {
 606                 printk(KERN_ERR DRV_NAME
 607                        ": %s: no arp_interval value specified.\n",
 608                        bond->dev->name);
 609                 ret = -EINVAL;
 610                 goto out;
 611         }
 612         if (new_value < 0) {
 613                 printk(KERN_ERR DRV_NAME
 614                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 615                        bond->dev->name, new_value, INT_MAX);
 616                 ret = -EINVAL;
 617                 goto out;
 618         }
 619
 620         printk(KERN_INFO DRV_NAME
 621                ": %s: Setting ARP monitoring interval to %d.\n",
 622                bond->dev->name, new_value);
 623         bond->params.arp_interval = new_value;
 624         if (bond->params.arp_interval)
 625                 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
 626         if (bond->params.miimon) {
 627                 printk(KERN_INFO DRV_NAME
 628                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 629                        "%s Disabling MII monitoring.\n",
 630                        bond->dev->name, bond->dev->name);
 631                 bond->params.miimon = 0;
 632                 if (delayed_work_pending(&bond->mii_work)) {
 633                         cancel_delayed_work(&bond->mii_work);
 634                         flush_workqueue(bond->wq);
 635                 }
 636         }
 637         if (!bond->params.arp_targets[0]) {
 638                 printk(KERN_INFO DRV_NAME
 639                        ": %s: ARP monitoring has been set up, "
 640                        "but no ARP targets have been specified.\n",
 641                        bond->dev->name);
 642         }
 643         if (bond->dev->flags & IFF_UP) {
 644                 /* If the interface is up, we may need to fire off
 645                  * the ARP timer.  If the interface is down, the
 646                  * timer will get fired off when the open function
 647                  * is called.
 648                  */
 649                 if (!delayed_work_pending(&bond->arp_work)) {
 650                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 651                                 INIT_DELAYED_WORK(&bond->arp_work,
 652                                                   bond_activebackup_arp_mon);
 653                         else
 654                                 INIT_DELAYED_WORK(&bond->arp_work,
 655                                                   bond_loadbalance_arp_mon);
 656
 657                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 658                 }
 659         }
 660
 661 out:
 662         return ret;
 663 }
 664 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 665
 666 /*
 667  * Show and set the arp targets.
 668  */
 669 static ssize_t bonding_show_arp_targets(struct device *d,
 670                                         struct device_attribute *attr,
 671                                         char *buf)
 672 {
 673         int i, res = 0;
 674         struct bonding *bond = to_bond(d);
 675
 676         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 677                 if (bond->params.arp_targets[i])
 678                         res += sprintf(buf + res, "%pI4 ",
 679                                        &bond->params.arp_targets[i]);
 680         }
 681         if (res)
 682                 buf[res-1] = '\n'; /* eat the leftover space */
 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 %pI4 specified for addition\n",
 702                                bond->dev->name, &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 %pI4 is already present\n",
 711                                        bond->dev->name, &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 %pI4.\n",
 720                                        bond->dev->name, &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 %pI4 specified for removal\n",
 738                                bond->dev->name, &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 %pI4.\n",
 747                                        bond->dev->name, &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 %pI4.\n",
 755                                bond->dev->name, &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);
 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);
 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);
 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(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 static ssize_t bonding_show_ad_select(struct device *d,
 949                                       struct device_attribute *attr,
 950                                       char *buf)
 951 {
 952         struct bonding *bond = to_bond(d);
 953
 954         return sprintf(buf, "%s %d\n",
 955                 ad_select_tbl[bond->params.ad_select].modename,
 956                 bond->params.ad_select);
 957 }
 958
 959
 960 static ssize_t bonding_store_ad_select(struct device *d,
 961                                        struct device_attribute *attr,
 962                                        const char *buf, size_t count)
 963 {
 964         int new_value, ret = count;
 965         struct bonding *bond = to_bond(d);
 966
 967         if (bond->dev->flags & IFF_UP) {
 968                 printk(KERN_ERR DRV_NAME
 969                        ": %s: Unable to update ad_select because interface "
 970                        "is up.\n", bond->dev->name);
 971                 ret = -EPERM;
 972                 goto out;
 973         }
 974
 975         new_value = bond_parse_parm(buf, ad_select_tbl);
 976
 977         if (new_value != -1) {
 978                 bond->params.ad_select = new_value;
 979                 printk(KERN_INFO DRV_NAME
 980                        ": %s: Setting ad_select to %s (%d).\n",
 981                        bond->dev->name, ad_select_tbl[new_value].modename,
 982                        new_value);
 983         } else {
 984                 printk(KERN_ERR DRV_NAME
 985                        ": %s: Ignoring invalid ad_select value %.*s.\n",
 986                        bond->dev->name, (int)strlen(buf) - 1, buf);
 987                 ret = -EINVAL;
 988         }
 989 out:
 990         return ret;
 991 }
 992
 993 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR, bonding_show_ad_select, bonding_store_ad_select);
 994
 995 /*
 996  * Show and set the number of grat ARP to send after a failover event.
 997  */
 998 static ssize_t bonding_show_n_grat_arp(struct device *d,
 999                                    struct device_attribute *attr,
1000                                    char *buf)
1001 {
1002         struct bonding *bond = to_bond(d);
1003
1004         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
1005 }
1006
1007 static ssize_t bonding_store_n_grat_arp(struct device *d,
1008                                     struct device_attribute *attr,
1009                                     const char *buf, size_t count)
1010 {
1011         int new_value, ret = count;
1012         struct bonding *bond = to_bond(d);
1013
1014         if (sscanf(buf, "%d", &new_value) != 1) {
1015                 printk(KERN_ERR DRV_NAME
1016                        ": %s: no num_grat_arp value specified.\n",
1017                        bond->dev->name);
1018                 ret = -EINVAL;
1019                 goto out;
1020         }
1021         if (new_value < 0 || new_value > 255) {
1022                 printk(KERN_ERR DRV_NAME
1023                        ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
1024                        bond->dev->name, new_value);
1025                 ret = -EINVAL;
1026                 goto out;
1027         } else {
1028                 bond->params.num_grat_arp = new_value;
1029         }
1030 out:
1031         return ret;
1032 }
1033 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
1034
1035 /*
1036  * Show and set the number of unsolicted NA's to send after a failover event.
1037  */
1038 static ssize_t bonding_show_n_unsol_na(struct device *d,
1039                                        struct device_attribute *attr,
1040                                        char *buf)
1041 {
1042         struct bonding *bond = to_bond(d);
1043
1044         return sprintf(buf, "%d\n", bond->params.num_unsol_na);
1045 }
1046
1047 static ssize_t bonding_store_n_unsol_na(struct device *d,
1048                                         struct device_attribute *attr,
1049                                         const char *buf, size_t count)
1050 {
1051         int new_value, ret = count;
1052         struct bonding *bond = to_bond(d);
1053
1054         if (sscanf(buf, "%d", &new_value) != 1) {
1055                 printk(KERN_ERR DRV_NAME
1056                        ": %s: no num_unsol_na value specified.\n",
1057                        bond->dev->name);
1058                 ret = -EINVAL;
1059                 goto out;
1060         }
1061         if (new_value < 0 || new_value > 255) {
1062                 printk(KERN_ERR DRV_NAME
1063                        ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
1064                        bond->dev->name, new_value);
1065                 ret = -EINVAL;
1066                 goto out;
1067         } else {
1068                 bond->params.num_unsol_na = new_value;
1069         }
1070 out:
1071         return ret;
1072 }
1073 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, bonding_show_n_unsol_na, bonding_store_n_unsol_na);
1074
1075 /*
1076  * Show and set the MII monitor interval.  There are two tricky bits
1077  * here.  First, if MII monitoring is activated, then we must disable
1078  * ARP monitoring.  Second, if the timer isn't running, we must
1079  * start it.
1080  */
1081 static ssize_t bonding_show_miimon(struct device *d,
1082                                    struct device_attribute *attr,
1083                                    char *buf)
1084 {
1085         struct bonding *bond = to_bond(d);
1086
1087         return sprintf(buf, "%d\n", bond->params.miimon);
1088 }
1089
1090 static ssize_t bonding_store_miimon(struct device *d,
1091                                     struct device_attribute *attr,
1092                                     const char *buf, size_t count)
1093 {
1094         int new_value, ret = count;
1095         struct bonding *bond = to_bond(d);
1096
1097         if (sscanf(buf, "%d", &new_value) != 1) {
1098                 printk(KERN_ERR DRV_NAME
1099                        ": %s: no miimon value specified.\n",
1100                        bond->dev->name);
1101                 ret = -EINVAL;
1102                 goto out;
1103         }
1104         if (new_value < 0) {
1105                 printk(KERN_ERR DRV_NAME
1106                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1107                        bond->dev->name, new_value, 1, INT_MAX);
1108                 ret = -EINVAL;
1109                 goto out;
1110         } else {
1111                 printk(KERN_INFO DRV_NAME
1112                        ": %s: Setting MII monitoring interval to %d.\n",
1113                        bond->dev->name, new_value);
1114                 bond->params.miimon = new_value;
1115                 if(bond->params.updelay)
1116                         printk(KERN_INFO DRV_NAME
1117                               ": %s: Note: Updating updelay (to %d) "
1118                               "since it is a multiple of the miimon value.\n",
1119                               bond->dev->name,
1120                               bond->params.updelay * bond->params.miimon);
1121                 if(bond->params.downdelay)
1122                         printk(KERN_INFO DRV_NAME
1123                               ": %s: Note: Updating downdelay (to %d) "
1124                               "since it is a multiple of the miimon value.\n",
1125                               bond->dev->name,
1126                               bond->params.downdelay * bond->params.miimon);
1127                 if (bond->params.arp_interval) {
1128                         printk(KERN_INFO DRV_NAME
1129                                ": %s: MII monitoring cannot be used with "
1130                                "ARP monitoring. Disabling ARP monitoring...\n",
1131                                bond->dev->name);
1132                         bond->params.arp_interval = 0;
1133                         bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1134                         if (bond->params.arp_validate) {
1135                                 bond_unregister_arp(bond);
1136                                 bond->params.arp_validate =
1137                                         BOND_ARP_VALIDATE_NONE;
1138                         }
1139                         if (delayed_work_pending(&bond->arp_work)) {
1140                                 cancel_delayed_work(&bond->arp_work);
1141                                 flush_workqueue(bond->wq);
1142                         }
1143                 }
1144
1145                 if (bond->dev->flags & IFF_UP) {
1146                         /* If the interface is up, we may need to fire off
1147                          * the MII timer. If the interface is down, the
1148                          * timer will get fired off when the open function
1149                          * is called.
1150                          */
1151                         if (!delayed_work_pending(&bond->mii_work)) {
1152                                 INIT_DELAYED_WORK(&bond->mii_work,
1153                                                   bond_mii_monitor);
1154                                 queue_delayed_work(bond->wq,
1155                                                    &bond->mii_work, 0);
1156                         }
1157                 }
1158         }
1159 out:
1160         return ret;
1161 }
1162 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1163
1164 /*
1165  * Show and set the primary slave.  The store function is much
1166  * simpler than bonding_store_slaves function because it only needs to
1167  * handle one interface name.
1168  * The bond must be a mode that supports a primary for this be
1169  * set.
1170  */
1171 static ssize_t bonding_show_primary(struct device *d,
1172                                     struct device_attribute *attr,
1173                                     char *buf)
1174 {
1175         int count = 0;
1176         struct bonding *bond = to_bond(d);
1177
1178         if (bond->primary_slave)
1179                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1180
1181         return count;
1182 }
1183
1184 static ssize_t bonding_store_primary(struct device *d,
1185                                      struct device_attribute *attr,
1186                                      const char *buf, size_t count)
1187 {
1188         int i;
1189         struct slave *slave;
1190         struct bonding *bond = to_bond(d);
1191
1192         rtnl_lock();
1193         read_lock(&bond->lock);
1194         write_lock_bh(&bond->curr_slave_lock);
1195
1196         if (!USES_PRIMARY(bond->params.mode)) {
1197                 printk(KERN_INFO DRV_NAME
1198                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1199                        bond->dev->name, bond->dev->name, bond->params.mode);
1200         } else {
1201                 bond_for_each_slave(bond, slave, i) {
1202                         if (strnicmp
1203                             (slave->dev->name, buf,
1204                              strlen(slave->dev->name)) == 0) {
1205                                 printk(KERN_INFO DRV_NAME
1206                                        ": %s: Setting %s as primary slave.\n",
1207                                        bond->dev->name, slave->dev->name);
1208                                 bond->primary_slave = slave;
1209                                 bond_select_active_slave(bond);
1210                                 goto out;
1211                         }
1212                 }
1213
1214                 /* if we got here, then we didn't match the name of any slave */
1215
1216                 if (strlen(buf) == 0 || buf[0] == '\n') {
1217                         printk(KERN_INFO DRV_NAME
1218                                ": %s: Setting primary slave to None.\n",
1219                                bond->dev->name);
1220                         bond->primary_slave = NULL;
1221                                 bond_select_active_slave(bond);
1222                 } else {
1223                         printk(KERN_INFO DRV_NAME
1224                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1225                                bond->dev->name, (int)strlen(buf) - 1, buf);
1226                 }
1227         }
1228 out:
1229         write_unlock_bh(&bond->curr_slave_lock);
1230         read_unlock(&bond->lock);
1231         rtnl_unlock();
1232
1233         return count;
1234 }
1235 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1236
1237 /*
1238  * Show and set the use_carrier flag.
1239  */
1240 static ssize_t bonding_show_carrier(struct device *d,
1241                                     struct device_attribute *attr,
1242                                     char *buf)
1243 {
1244         struct bonding *bond = to_bond(d);
1245
1246         return sprintf(buf, "%d\n", bond->params.use_carrier);
1247 }
1248
1249 static ssize_t bonding_store_carrier(struct device *d,
1250                                      struct device_attribute *attr,
1251                                      const char *buf, size_t count)
1252 {
1253         int new_value, ret = count;
1254         struct bonding *bond = to_bond(d);
1255
1256
1257         if (sscanf(buf, "%d", &new_value) != 1) {
1258                 printk(KERN_ERR DRV_NAME
1259                        ": %s: no use_carrier value specified.\n",
1260                        bond->dev->name);
1261                 ret = -EINVAL;
1262                 goto out;
1263         }
1264         if ((new_value == 0) || (new_value == 1)) {
1265                 bond->params.use_carrier = new_value;
1266                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1267                        bond->dev->name, new_value);
1268         } else {
1269                 printk(KERN_INFO DRV_NAME
1270                        ": %s: Ignoring invalid use_carrier value %d.\n",
1271                        bond->dev->name, new_value);
1272         }
1273 out:
1274         return count;
1275 }
1276 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1277
1278
1279 /*
1280  * Show and set currently active_slave.
1281  */
1282 static ssize_t bonding_show_active_slave(struct device *d,
1283                                          struct device_attribute *attr,
1284                                          char *buf)
1285 {
1286         struct slave *curr;
1287         struct bonding *bond = to_bond(d);
1288         int count = 0;
1289
1290         read_lock(&bond->curr_slave_lock);
1291         curr = bond->curr_active_slave;
1292         read_unlock(&bond->curr_slave_lock);
1293
1294         if (USES_PRIMARY(bond->params.mode) && curr)
1295                 count = sprintf(buf, "%s\n", curr->dev->name);
1296         return count;
1297 }
1298
1299 static ssize_t bonding_store_active_slave(struct device *d,
1300                                           struct device_attribute *attr,
1301                                           const char *buf, size_t count)
1302 {
1303         int i;
1304         struct slave *slave;
1305         struct slave *old_active = NULL;
1306         struct slave *new_active = NULL;
1307         struct bonding *bond = to_bond(d);
1308
1309         rtnl_lock();
1310         read_lock(&bond->lock);
1311         write_lock_bh(&bond->curr_slave_lock);
1312
1313         if (!USES_PRIMARY(bond->params.mode)) {
1314                 printk(KERN_INFO DRV_NAME
1315                        ": %s: Unable to change active slave; %s is in mode %d\n",
1316                        bond->dev->name, bond->dev->name, bond->params.mode);
1317         } else {
1318                 bond_for_each_slave(bond, slave, i) {
1319                         if (strnicmp
1320                             (slave->dev->name, buf,
1321                              strlen(slave->dev->name)) == 0) {
1322                                 old_active = bond->curr_active_slave;
1323                                 new_active = slave;
1324                                 if (new_active == old_active) {
1325                                         /* do nothing */
1326                                         printk(KERN_INFO DRV_NAME
1327                                                ": %s: %s is already the current active slave.\n",
1328                                                bond->dev->name, slave->dev->name);
1329                                         goto out;
1330                                 }
1331                                 else {
1332                                         if ((new_active) &&
1333                                             (old_active) &&
1334                                             (new_active->link == BOND_LINK_UP) &&
1335                                             IS_UP(new_active->dev)) {
1336                                                 printk(KERN_INFO DRV_NAME
1337                                                       ": %s: Setting %s as active slave.\n",
1338                                                       bond->dev->name, slave->dev->name);
1339                                                 bond_change_active_slave(bond, new_active);
1340                                         }
1341                                         else {
1342                                                 printk(KERN_INFO DRV_NAME
1343                                                       ": %s: Could not set %s as active slave; "
1344                                                       "either %s is down or the link is down.\n",
1345                                                       bond->dev->name, slave->dev->name,
1346                                                       slave->dev->name);
1347                                         }
1348                                         goto out;
1349                                 }
1350                         }
1351                 }
1352
1353                 /* if we got here, then we didn't match the name of any slave */
1354
1355                 if (strlen(buf) == 0 || buf[0] == '\n') {
1356                         printk(KERN_INFO DRV_NAME
1357                                ": %s: Setting active slave to None.\n",
1358                                bond->dev->name);
1359                         bond->primary_slave = NULL;
1360                                 bond_select_active_slave(bond);
1361                 } else {
1362                         printk(KERN_INFO DRV_NAME
1363                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1364                                bond->dev->name, (int)strlen(buf) - 1, buf);
1365                 }
1366         }
1367 out:
1368         write_unlock_bh(&bond->curr_slave_lock);
1369         read_unlock(&bond->lock);
1370         rtnl_unlock();
1371
1372         return count;
1373
1374 }
1375 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1376
1377
1378 /*
1379  * Show link status of the bond interface.
1380  */
1381 static ssize_t bonding_show_mii_status(struct device *d,
1382                                        struct device_attribute *attr,
1383                                        char *buf)
1384 {
1385         struct slave *curr;
1386         struct bonding *bond = to_bond(d);
1387
1388         read_lock(&bond->curr_slave_lock);
1389         curr = bond->curr_active_slave;
1390         read_unlock(&bond->curr_slave_lock);
1391
1392         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1393 }
1394 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1395
1396
1397 /*
1398  * Show current 802.3ad aggregator ID.
1399  */
1400 static ssize_t bonding_show_ad_aggregator(struct device *d,
1401                                           struct device_attribute *attr,
1402                                           char *buf)
1403 {
1404         int count = 0;
1405         struct bonding *bond = to_bond(d);
1406
1407         if (bond->params.mode == BOND_MODE_8023AD) {
1408                 struct ad_info ad_info;
1409                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1410         }
1411
1412         return count;
1413 }
1414 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1415
1416
1417 /*
1418  * Show number of active 802.3ad ports.
1419  */
1420 static ssize_t bonding_show_ad_num_ports(struct device *d,
1421                                          struct device_attribute *attr,
1422                                          char *buf)
1423 {
1424         int count = 0;
1425         struct bonding *bond = to_bond(d);
1426
1427         if (bond->params.mode == BOND_MODE_8023AD) {
1428                 struct ad_info ad_info;
1429                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1430         }
1431
1432         return count;
1433 }
1434 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1435
1436
1437 /*
1438  * Show current 802.3ad actor key.
1439  */
1440 static ssize_t bonding_show_ad_actor_key(struct device *d,
1441                                          struct device_attribute *attr,
1442                                          char *buf)
1443 {
1444         int count = 0;
1445         struct bonding *bond = to_bond(d);
1446
1447         if (bond->params.mode == BOND_MODE_8023AD) {
1448                 struct ad_info ad_info;
1449                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1450         }
1451
1452         return count;
1453 }
1454 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1455
1456
1457 /*
1458  * Show current 802.3ad partner key.
1459  */
1460 static ssize_t bonding_show_ad_partner_key(struct device *d,
1461                                            struct device_attribute *attr,
1462                                            char *buf)
1463 {
1464         int count = 0;
1465         struct bonding *bond = to_bond(d);
1466
1467         if (bond->params.mode == BOND_MODE_8023AD) {
1468                 struct ad_info ad_info;
1469                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1470         }
1471
1472         return count;
1473 }
1474 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1475
1476
1477 /*
1478  * Show current 802.3ad partner mac.
1479  */
1480 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1481                                            struct device_attribute *attr,
1482                                            char *buf)
1483 {
1484         int count = 0;
1485         struct bonding *bond = to_bond(d);
1486
1487         if (bond->params.mode == BOND_MODE_8023AD) {
1488                 struct ad_info ad_info;
1489                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1490                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1491                 }
1492         }
1493
1494         return count;
1495 }
1496 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1497
1498
1499
1500 static struct attribute *per_bond_attrs[] = {
1501         &dev_attr_slaves.attr,
1502         &dev_attr_mode.attr,
1503         &dev_attr_fail_over_mac.attr,
1504         &dev_attr_arp_validate.attr,
1505         &dev_attr_arp_interval.attr,
1506         &dev_attr_arp_ip_target.attr,
1507         &dev_attr_downdelay.attr,
1508         &dev_attr_updelay.attr,
1509         &dev_attr_lacp_rate.attr,
1510         &dev_attr_ad_select.attr,
1511         &dev_attr_xmit_hash_policy.attr,
1512         &dev_attr_num_grat_arp.attr,
1513         &dev_attr_num_unsol_na.attr,
1514         &dev_attr_miimon.attr,
1515         &dev_attr_primary.attr,
1516         &dev_attr_use_carrier.attr,
1517         &dev_attr_active_slave.attr,
1518         &dev_attr_mii_status.attr,
1519         &dev_attr_ad_aggregator.attr,
1520         &dev_attr_ad_num_ports.attr,
1521         &dev_attr_ad_actor_key.attr,
1522         &dev_attr_ad_partner_key.attr,
1523         &dev_attr_ad_partner_mac.attr,
1524         NULL,
1525 };
1526
1527 static struct attribute_group bonding_group = {
1528         .name = "bonding",
1529         .attrs = per_bond_attrs,
1530 };
1531
1532 /*
1533  * Initialize sysfs.  This sets up the bonding_masters file in
1534  * /sys/class/net.
1535  */
1536 int bond_create_sysfs(void)
1537 {
1538         int ret;
1539
1540         ret = netdev_class_create_file(&class_attr_bonding_masters);
1541         /*
1542          * Permit multiple loads of the module by ignoring failures to
1543          * create the bonding_masters sysfs file.  Bonding devices
1544          * created by second or subsequent loads of the module will
1545          * not be listed in, or controllable by, bonding_masters, but
1546          * will have the usual "bonding" sysfs directory.
1547          *
1548          * This is done to preserve backwards compatibility for
1549          * initscripts/sysconfig, which load bonding multiple times to
1550          * configure multiple bonding devices.
1551          */
1552         if (ret == -EEXIST) {
1553                 /* Is someone being kinky and naming a device bonding_master? */
1554                 if (__dev_get_by_name(&init_net,
1555                                       class_attr_bonding_masters.attr.name))
1556                         printk(KERN_ERR
1557                                "network device named %s already exists in sysfs",
1558                                class_attr_bonding_masters.attr.name);
1559         }
1560
1561         return ret;
1562
1563 }
1564
1565 /*
1566  * Remove /sys/class/net/bonding_masters.
1567  */
1568 void bond_destroy_sysfs(void)
1569 {
1570         netdev_class_remove_file(&class_attr_bonding_masters);
1571 }
1572
1573 /*
1574  * Initialize sysfs for each bond.  This sets up and registers
1575  * the 'bondctl' directory for each individual bond under /sys/class/net.
1576  */
1577 int bond_create_sysfs_entry(struct bonding *bond)
1578 {
1579         struct net_device *dev = bond->dev;
1580         int err;
1581
1582         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1583         if (err) {
1584                 printk(KERN_EMERG "eek! didn't create group!\n");
1585         }
1586
1587         if (expected_refcount < 1)
1588                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1589
1590         return err;
1591 }
1592 /*
1593  * Remove sysfs entries for each bond.
1594  */
1595 void bond_destroy_sysfs_entry(struct bonding *bond)
1596 {
1597         struct net_device *dev = bond->dev;
1598
1599         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1600 }
1601