drivers/net/bonding/bond_sysfs.c

   1
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  */
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/device.h>
  26 #include <linux/sysdev.h>
  27 #include <linux/fs.h>
  28 #include <linux/types.h>
  29 #include <linux/string.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/inetdevice.h>
  32 #include <linux/in.h>
  33 #include <linux/sysfs.h>
  34 #include <linux/ctype.h>
  35 #include <linux/inet.h>
  36 #include <linux/rtnetlink.h>
  37 #include <net/net_namespace.h>
  38
  39 /* #define BONDING_DEBUG 1 */
  40 #include "bonding.h"
  41 #define to_dev(obj)     container_of(obj,struct device,kobj)
  42 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  43
  44 /*---------------------------- Declarations -------------------------------*/
  45
  46
  47 extern struct list_head bond_dev_list;
  48 extern struct bond_params bonding_defaults;
  49 extern struct bond_parm_tbl bond_mode_tbl[];
  50 extern struct bond_parm_tbl bond_lacp_tbl[];
  51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  52 extern struct bond_parm_tbl arp_validate_tbl[];
  53
  54 static int expected_refcount = -1;
  55 static struct class *netdev_class;
  56 /*--------------------------- Data Structures -----------------------------*/
  57
  58 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
  59  * Because kobject_register tries to acquire the subsystem lock.  If
  60  * we already hold the lock (which we would if the user was creating
  61  * a new bond through the sysfs interface), we deadlock.
  62  * This lock is only needed when deleting a bond - we need to make sure
  63  * that we don't collide with an ongoing ioctl.
  64  */
  65
  66 struct rw_semaphore bonding_rwsem;
  67
  68
  69
  70
  71 /*------------------------------ Functions --------------------------------*/
  72
  73 /*
  74  * "show" function for the bond_masters attribute.
  75  * The class parameter is ignored.
  76  */
  77 static ssize_t bonding_show_bonds(struct class *cls, char *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         if (res) buffer[res-1] = '\n'; /* eat the leftover space */
  96         up_read(&(bonding_rwsem));
  97         return res;
  98 }
  99
 100 /*
 101  * "store" function for the bond_masters attribute.  This is what
 102  * creates and deletes entire bonds.
 103  *
 104  * The class parameter is ignored.
 105  *
 106  */
 107
 108 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 109 {
 110         char command[IFNAMSIZ + 1] = {0, };
 111         char *ifname;
 112         int res = count;
 113         struct bonding *bond;
 114         struct bonding *nxt;
 115
 116         down_write(&(bonding_rwsem));
 117         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 118         ifname = command + 1;
 119         if ((strlen(command) <= 1) ||
 120             !dev_valid_name(ifname))
 121                 goto err_no_cmd;
 122
 123         if (command[0] == '+') {
 124
 125                 /* Check to see if the bond already exists. */
 126                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 127                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 128                                 printk(KERN_ERR DRV_NAME
 129                                         ": cannot add bond %s; it already exists\n",
 130                                         ifname);
 131                                 res = -EPERM;
 132                                 goto out;
 133                         }
 134
 135                 printk(KERN_INFO DRV_NAME
 136                         ": %s is being created...\n", ifname);
 137                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 138                         printk(KERN_INFO DRV_NAME
 139                         ": %s interface already exists. Bond creation failed.\n",
 140                         ifname);
 141                         res = -EPERM;
 142                 }
 143                 goto out;
 144         }
 145
 146         if (command[0] == '-') {
 147                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 148                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 149                                 rtnl_lock();
 150                                 /* check the ref count on the bond's kobject.
 151                                  * If it's > expected, then there's a file open,
 152                                  * and we have to fail.
 153                                  */
 154                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 155                                                         > expected_refcount){
 156                                         rtnl_unlock();
 157                                         printk(KERN_INFO DRV_NAME
 158                                                 ": Unable remove bond %s due to open references.\n",
 159                                                 ifname);
 160                                         res = -EPERM;
 161                                         goto out;
 162                                 }
 163                                 printk(KERN_INFO DRV_NAME
 164                                         ": %s is being deleted...\n",
 165                                         bond->dev->name);
 166                                 bond_destroy(bond);
 167                                 rtnl_unlock();
 168                                 goto out;
 169                         }
 170
 171                 printk(KERN_ERR DRV_NAME
 172                         ": unable to delete non-existent bond %s\n", ifname);
 173                 res = -ENODEV;
 174                 goto out;
 175         }
 176
 177 err_no_cmd:
 178         printk(KERN_ERR DRV_NAME
 179                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 180         res = -EPERM;
 181
 182         /* Always return either count or an error.  If you return 0, you'll
 183          * get called forever, which is bad.
 184          */
 185 out:
 186         up_write(&(bonding_rwsem));
 187         return res;
 188 }
 189 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 190 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 191                   bonding_show_bonds, bonding_store_bonds);
 192
 193 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 194 {
 195         char linkname[IFNAMSIZ+7];
 196         int ret = 0;
 197
 198         /* first, create a link from the slave back to the master */
 199         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 200                                 "master");
 201         if (ret)
 202                 return ret;
 203         /* next, create a link from the master to the slave */
 204         sprintf(linkname,"slave_%s",slave->name);
 205         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 206                                 linkname);
 207         return ret;
 208
 209 }
 210
 211 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 212 {
 213         char linkname[IFNAMSIZ+7];
 214
 215         sysfs_remove_link(&(slave->dev.kobj), "master");
 216         sprintf(linkname,"slave_%s",slave->name);
 217         sysfs_remove_link(&(master->dev.kobj), linkname);
 218 }
 219
 220
 221 /*
 222  * Show the slaves in the current bond.
 223  */
 224 static ssize_t bonding_show_slaves(struct device *d,
 225                                    struct device_attribute *attr, char *buf)
 226 {
 227         struct slave *slave;
 228         int i, res = 0;
 229         struct bonding *bond = to_bond(d);
 230
 231         read_lock(&bond->lock);
 232         bond_for_each_slave(bond, slave, i) {
 233                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 234                         /* not enough space for another interface name */
 235                         if ((PAGE_SIZE - res) > 10)
 236                                 res = PAGE_SIZE - 10;
 237                         res += sprintf(buf + res, "++more++ ");
 238                         break;
 239                 }
 240                 res += sprintf(buf + res, "%s ", slave->dev->name);
 241         }
 242         read_unlock(&bond->lock);
 243         if (res) buf[res-1] = '\n'; /* eat the leftover space */
 244         return res;
 245 }
 246
 247 /*
 248  * Set the slaves in the current bond.  The bond interface must be
 249  * up for this to succeed.
 250  * This function is largely the same flow as bonding_update_bonds().
 251  */
 252 static ssize_t bonding_store_slaves(struct device *d,
 253                                     struct device_attribute *attr,
 254                                     const char *buffer, size_t count)
 255 {
 256         char command[IFNAMSIZ + 1] = { 0, };
 257         char *ifname;
 258         int i, res, found, ret = count;
 259         u32 original_mtu;
 260         struct slave *slave;
 261         struct net_device *dev = NULL;
 262         struct bonding *bond = to_bond(d);
 263
 264         /* Quick sanity check -- is the bond interface up? */
 265         if (!(bond->dev->flags & IFF_UP)) {
 266                 printk(KERN_WARNING DRV_NAME
 267                        ": %s: doing slave updates when interface is down.\n",
 268                        bond->dev->name);
 269         }
 270
 271         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 272
 273         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 274         ifname = command + 1;
 275         if ((strlen(command) <= 1) ||
 276             !dev_valid_name(ifname))
 277                 goto err_no_cmd;
 278
 279         if (command[0] == '+') {
 280
 281                 /* Got a slave name in ifname.  Is it already in the list? */
 282                 found = 0;
 283                 read_lock(&bond->lock);
 284                 bond_for_each_slave(bond, slave, i)
 285                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 286                                 printk(KERN_ERR DRV_NAME
 287                                        ": %s: Interface %s is already enslaved!\n",
 288                                        bond->dev->name, ifname);
 289                                 ret = -EPERM;
 290                                 read_unlock(&bond->lock);
 291                                 goto out;
 292                         }
 293
 294                 read_unlock(&bond->lock);
 295                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 296                        bond->dev->name, ifname);
 297                 dev = dev_get_by_name(&init_net, ifname);
 298                 if (!dev) {
 299                         printk(KERN_INFO DRV_NAME
 300                                ": %s: Interface %s does not exist!\n",
 301                                bond->dev->name, ifname);
 302                         ret = -EPERM;
 303                         goto out;
 304                 }
 305                 else
 306                         dev_put(dev);
 307
 308                 if (dev->flags & IFF_UP) {
 309                         printk(KERN_ERR DRV_NAME
 310                                ": %s: Error: Unable to enslave %s "
 311                                "because it is already up.\n",
 312                                bond->dev->name, dev->name);
 313                         ret = -EPERM;
 314                         goto out;
 315                 }
 316                 /* If this is the first slave, then we need to set
 317                    the master's hardware address to be the same as the
 318                    slave's. */
 319                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 320                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 321                                dev->addr_len);
 322                 }
 323
 324                 /* Set the slave's MTU to match the bond */
 325                 original_mtu = dev->mtu;
 326                 if (dev->mtu != bond->dev->mtu) {
 327                         if (dev->change_mtu) {
 328                                 res = dev->change_mtu(dev,
 329                                                       bond->dev->mtu);
 330                                 if (res) {
 331                                         ret = res;
 332                                         goto out;
 333                                 }
 334                         } else {
 335                                 dev->mtu = bond->dev->mtu;
 336                         }
 337                 }
 338                 rtnl_lock();
 339                 res = bond_enslave(bond->dev, dev);
 340                 bond_for_each_slave(bond, slave, i)
 341                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 342                                 slave->original_mtu = original_mtu;
 343                 rtnl_unlock();
 344                 if (res) {
 345                         ret = res;
 346                 }
 347                 goto out;
 348         }
 349
 350         if (command[0] == '-') {
 351                 dev = NULL;
 352                 bond_for_each_slave(bond, slave, i)
 353                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 354                                 dev = slave->dev;
 355                                 original_mtu = slave->original_mtu;
 356                                 break;
 357                         }
 358                 if (dev) {
 359                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 360                                 bond->dev->name, dev->name);
 361                         rtnl_lock();
 362                         if (bond->setup_by_slave)
 363                                 res = bond_release_and_destroy(bond->dev, dev);
 364                         else
 365                                 res = bond_release(bond->dev, dev);
 366                         rtnl_unlock();
 367                         if (res) {
 368                                 ret = res;
 369                                 goto out;
 370                         }
 371                         /* set the slave MTU to the default */
 372                         if (dev->change_mtu) {
 373                                 dev->change_mtu(dev, original_mtu);
 374                         } else {
 375                                 dev->mtu = original_mtu;
 376                         }
 377                 }
 378                 else {
 379                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 380                                 ifname, bond->dev->name);
 381                         ret = -ENODEV;
 382                 }
 383                 goto out;
 384         }
 385
 386 err_no_cmd:
 387         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 388         ret = -EPERM;
 389
 390 out:
 391         return ret;
 392 }
 393
 394 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 395
 396 /*
 397  * Show and set the bonding mode.  The bond interface must be down to
 398  * change the mode.
 399  */
 400 static ssize_t bonding_show_mode(struct device *d,
 401                                  struct device_attribute *attr, char *buf)
 402 {
 403         struct bonding *bond = to_bond(d);
 404
 405         return sprintf(buf, "%s %d\n",
 406                         bond_mode_tbl[bond->params.mode].modename,
 407                         bond->params.mode);
 408 }
 409
 410 static ssize_t bonding_store_mode(struct device *d,
 411                                   struct device_attribute *attr,
 412                                   const char *buf, size_t count)
 413 {
 414         int new_value, ret = count;
 415         struct bonding *bond = to_bond(d);
 416
 417         if (bond->dev->flags & IFF_UP) {
 418                 printk(KERN_ERR DRV_NAME
 419                        ": unable to update mode of %s because interface is up.\n",
 420                        bond->dev->name);
 421                 ret = -EPERM;
 422                 goto out;
 423         }
 424
 425         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 426         if (new_value < 0)  {
 427                 printk(KERN_ERR DRV_NAME
 428                        ": %s: Ignoring invalid mode value %.*s.\n",
 429                        bond->dev->name,
 430                        (int)strlen(buf) - 1, buf);
 431                 ret = -EINVAL;
 432                 goto out;
 433         } else {
 434                 if (bond->params.mode == BOND_MODE_8023AD)
 435                         bond_unset_master_3ad_flags(bond);
 436
 437                 if (bond->params.mode == BOND_MODE_ALB)
 438                         bond_unset_master_alb_flags(bond);
 439
 440                 bond->params.mode = new_value;
 441                 bond_set_mode_ops(bond, bond->params.mode);
 442                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 443                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 444         }
 445 out:
 446         return ret;
 447 }
 448 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 449
 450 /*
 451  * Show and set the bonding transmit hash method.  The bond interface must be down to
 452  * change the xmit hash policy.
 453  */
 454 static ssize_t bonding_show_xmit_hash(struct device *d,
 455                                       struct device_attribute *attr,
 456                                       char *buf)
 457 {
 458         int count = 0;
 459         struct bonding *bond = to_bond(d);
 460
 461         if ((bond->params.mode == BOND_MODE_XOR) ||
 462             (bond->params.mode == BOND_MODE_8023AD)) {
 463                 count = sprintf(buf, "%s %d\n",
 464                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 465                         bond->params.xmit_policy);
 466         }
 467
 468         return count;
 469 }
 470
 471 static ssize_t bonding_store_xmit_hash(struct device *d,
 472                                        struct device_attribute *attr,
 473                                        const char *buf, size_t count)
 474 {
 475         int new_value, ret = count;
 476         struct bonding *bond = to_bond(d);
 477
 478         if (bond->dev->flags & IFF_UP) {
 479                 printk(KERN_ERR DRV_NAME
 480                        "%s: Interface is up. Unable to update xmit policy.\n",
 481                        bond->dev->name);
 482                 ret = -EPERM;
 483                 goto out;
 484         }
 485
 486         if ((bond->params.mode != BOND_MODE_XOR) &&
 487             (bond->params.mode != BOND_MODE_8023AD)) {
 488                 printk(KERN_ERR DRV_NAME
 489                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 490                        bond->dev->name);
 491                 ret = -EPERM;
 492                 goto out;
 493         }
 494
 495         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 496         if (new_value < 0)  {
 497                 printk(KERN_ERR DRV_NAME
 498                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 499                        bond->dev->name,
 500                        (int)strlen(buf) - 1, buf);
 501                 ret = -EINVAL;
 502                 goto out;
 503         } else {
 504                 bond->params.xmit_policy = new_value;
 505                 bond_set_mode_ops(bond, bond->params.mode);
 506                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 507                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 508         }
 509 out:
 510         return ret;
 511 }
 512 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 513
 514 /*
 515  * Show and set arp_validate.
 516  */
 517 static ssize_t bonding_show_arp_validate(struct device *d,
 518                                          struct device_attribute *attr,
 519                                          char *buf)
 520 {
 521         struct bonding *bond = to_bond(d);
 522
 523         return sprintf(buf, "%s %d\n",
 524                        arp_validate_tbl[bond->params.arp_validate].modename,
 525                        bond->params.arp_validate);
 526 }
 527
 528 static ssize_t bonding_store_arp_validate(struct device *d,
 529                                           struct device_attribute *attr,
 530                                           const char *buf, size_t count)
 531 {
 532         int new_value;
 533         struct bonding *bond = to_bond(d);
 534
 535         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
 536         if (new_value < 0) {
 537                 printk(KERN_ERR DRV_NAME
 538                        ": %s: Ignoring invalid arp_validate value %s\n",
 539                        bond->dev->name, buf);
 540                 return -EINVAL;
 541         }
 542         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 543                 printk(KERN_ERR DRV_NAME
 544                        ": %s: arp_validate only supported in active-backup mode.\n",
 545                        bond->dev->name);
 546                 return -EINVAL;
 547         }
 548         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 549                bond->dev->name, arp_validate_tbl[new_value].modename,
 550                new_value);
 551
 552         if (!bond->params.arp_validate && new_value) {
 553                 bond_register_arp(bond);
 554         } else if (bond->params.arp_validate && !new_value) {
 555                 bond_unregister_arp(bond);
 556         }
 557
 558         bond->params.arp_validate = new_value;
 559
 560         return count;
 561 }
 562
 563 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 564
 565 /*
 566  * Show and store fail_over_mac.  User only allowed to change the
 567  * value when there are no slaves.
 568  */
 569 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 570 {
 571         struct bonding *bond = to_bond(d);
 572
 573         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
 574 }
 575
 576 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 577 {
 578         int new_value;
 579         int ret = count;
 580         struct bonding *bond = to_bond(d);
 581
 582         if (bond->slave_cnt != 0) {
 583                 printk(KERN_ERR DRV_NAME
 584                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 585                        bond->dev->name);
 586                 ret = -EPERM;
 587                 goto out;
 588         }
 589
 590         if (sscanf(buf, "%d", &new_value) != 1) {
 591                 printk(KERN_ERR DRV_NAME
 592                        ": %s: no fail_over_mac value specified.\n",
 593                        bond->dev->name);
 594                 ret = -EINVAL;
 595                 goto out;
 596         }
 597
 598         if ((new_value == 0) || (new_value == 1)) {
 599                 bond->params.fail_over_mac = new_value;
 600                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
 601                        bond->dev->name, new_value);
 602         } else {
 603                 printk(KERN_INFO DRV_NAME
 604                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
 605                        bond->dev->name, new_value);
 606         }
 607 out:
 608         return ret;
 609 }
 610
 611 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 612
 613 /*
 614  * Show and set the arp timer interval.  There are two tricky bits
 615  * here.  First, if ARP monitoring is activated, then we must disable
 616  * MII monitoring.  Second, if the ARP timer isn't running, we must
 617  * start it.
 618  */
 619 static ssize_t bonding_show_arp_interval(struct device *d,
 620                                          struct device_attribute *attr,
 621                                          char *buf)
 622 {
 623         struct bonding *bond = to_bond(d);
 624
 625         return sprintf(buf, "%d\n", bond->params.arp_interval);
 626 }
 627
 628 static ssize_t bonding_store_arp_interval(struct device *d,
 629                                           struct device_attribute *attr,
 630                                           const char *buf, size_t count)
 631 {
 632         int new_value, ret = count;
 633         struct bonding *bond = to_bond(d);
 634
 635         if (sscanf(buf, "%d", &new_value) != 1) {
 636                 printk(KERN_ERR DRV_NAME
 637                        ": %s: no arp_interval value specified.\n",
 638                        bond->dev->name);
 639                 ret = -EINVAL;
 640                 goto out;
 641         }
 642         if (new_value < 0) {
 643                 printk(KERN_ERR DRV_NAME
 644                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 645                        bond->dev->name, new_value, INT_MAX);
 646                 ret = -EINVAL;
 647                 goto out;
 648         }
 649
 650         printk(KERN_INFO DRV_NAME
 651                ": %s: Setting ARP monitoring interval to %d.\n",
 652                bond->dev->name, new_value);
 653         bond->params.arp_interval = new_value;
 654         if (bond->params.miimon) {
 655                 printk(KERN_INFO DRV_NAME
 656                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 657                        "%s Disabling MII monitoring.\n",
 658                        bond->dev->name, bond->dev->name);
 659                 bond->params.miimon = 0;
 660                 if (delayed_work_pending(&bond->mii_work)) {
 661                         cancel_delayed_work(&bond->mii_work);
 662                         flush_workqueue(bond->wq);
 663                 }
 664         }
 665         if (!bond->params.arp_targets[0]) {
 666                 printk(KERN_INFO DRV_NAME
 667                        ": %s: ARP monitoring has been set up, "
 668                        "but no ARP targets have been specified.\n",
 669                        bond->dev->name);
 670         }
 671         if (bond->dev->flags & IFF_UP) {
 672                 /* If the interface is up, we may need to fire off
 673                  * the ARP timer.  If the interface is down, the
 674                  * timer will get fired off when the open function
 675                  * is called.
 676                  */
 677                 if (!delayed_work_pending(&bond->arp_work)) {
 678                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 679                                 INIT_DELAYED_WORK(&bond->arp_work,
 680                                                   bond_activebackup_arp_mon);
 681                         else
 682                                 INIT_DELAYED_WORK(&bond->arp_work,
 683                                                   bond_loadbalance_arp_mon);
 684
 685                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 686                 }
 687         }
 688
 689 out:
 690         return ret;
 691 }
 692 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 693
 694 /*
 695  * Show and set the arp targets.
 696  */
 697 static ssize_t bonding_show_arp_targets(struct device *d,
 698                                         struct device_attribute *attr,
 699                                         char *buf)
 700 {
 701         int i, res = 0;
 702         struct bonding *bond = to_bond(d);
 703
 704         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 705                 if (bond->params.arp_targets[i])
 706                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 707                                NIPQUAD(bond->params.arp_targets[i]));
 708         }
 709         if (res) buf[res-1] = '\n'; /* eat the leftover space */
 710         return res;
 711 }
 712
 713 static ssize_t bonding_store_arp_targets(struct device *d,
 714                                          struct device_attribute *attr,
 715                                          const char *buf, size_t count)
 716 {
 717         __be32 newtarget;
 718         int i = 0, done = 0, ret = count;
 719         struct bonding *bond = to_bond(d);
 720         __be32 *targets;
 721
 722         targets = bond->params.arp_targets;
 723         newtarget = in_aton(buf + 1);
 724         /* look for adds */
 725         if (buf[0] == '+') {
 726                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 727                         printk(KERN_ERR DRV_NAME
 728                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 729                                bond->dev->name, NIPQUAD(newtarget));
 730                         ret = -EINVAL;
 731                         goto out;
 732                 }
 733                 /* look for an empty slot to put the target in, and check for dupes */
 734                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 735                         if (targets[i] == newtarget) { /* duplicate */
 736                                 printk(KERN_ERR DRV_NAME
 737                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 738                                        bond->dev->name, NIPQUAD(newtarget));
 739                                 if (done)
 740                                         targets[i] = 0;
 741                                 ret = -EINVAL;
 742                                 goto out;
 743                         }
 744                         if (targets[i] == 0 && !done) {
 745                                 printk(KERN_INFO DRV_NAME
 746                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 747                                        bond->dev->name, NIPQUAD(newtarget));
 748                                 done = 1;
 749                                 targets[i] = newtarget;
 750                         }
 751                 }
 752                 if (!done) {
 753                         printk(KERN_ERR DRV_NAME
 754                                ": %s: ARP target table is full!\n",
 755                                bond->dev->name);
 756                         ret = -EINVAL;
 757                         goto out;
 758                 }
 759
 760         }
 761         else if (buf[0] == '-') {
 762                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 763                         printk(KERN_ERR DRV_NAME
 764                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 765                                bond->dev->name, NIPQUAD(newtarget));
 766                         ret = -EINVAL;
 767                         goto out;
 768                 }
 769
 770                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 771                         if (targets[i] == newtarget) {
 772                                 printk(KERN_INFO DRV_NAME
 773                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 774                                        bond->dev->name, NIPQUAD(newtarget));
 775                                 targets[i] = 0;
 776                                 done = 1;
 777                         }
 778                 }
 779                 if (!done) {
 780                         printk(KERN_INFO DRV_NAME
 781                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 782                                bond->dev->name, NIPQUAD(newtarget));
 783                         ret = -EINVAL;
 784                         goto out;
 785                 }
 786         }
 787         else {
 788                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 789                         bond->dev->name);
 790                 ret = -EPERM;
 791                 goto out;
 792         }
 793
 794 out:
 795         return ret;
 796 }
 797 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 798
 799 /*
 800  * Show and set the up and down delays.  These must be multiples of the
 801  * MII monitoring value, and are stored internally as the multiplier.
 802  * Thus, we must translate to MS for the real world.
 803  */
 804 static ssize_t bonding_show_downdelay(struct device *d,
 805                                       struct device_attribute *attr,
 806                                       char *buf)
 807 {
 808         struct bonding *bond = to_bond(d);
 809
 810         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 811 }
 812
 813 static ssize_t bonding_store_downdelay(struct device *d,
 814                                        struct device_attribute *attr,
 815                                        const char *buf, size_t count)
 816 {
 817         int new_value, ret = count;
 818         struct bonding *bond = to_bond(d);
 819
 820         if (!(bond->params.miimon)) {
 821                 printk(KERN_ERR DRV_NAME
 822                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 823                        bond->dev->name);
 824                 ret = -EPERM;
 825                 goto out;
 826         }
 827
 828         if (sscanf(buf, "%d", &new_value) != 1) {
 829                 printk(KERN_ERR DRV_NAME
 830                        ": %s: no down delay value specified.\n",
 831                        bond->dev->name);
 832                 ret = -EINVAL;
 833                 goto out;
 834         }
 835         if (new_value < 0) {
 836                 printk(KERN_ERR DRV_NAME
 837                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 838                        bond->dev->name, new_value, 1, INT_MAX);
 839                 ret = -EINVAL;
 840                 goto out;
 841         } else {
 842                 if ((new_value % bond->params.miimon) != 0) {
 843                         printk(KERN_WARNING DRV_NAME
 844                                ": %s: Warning: down delay (%d) is not a multiple "
 845                                "of miimon (%d), delay rounded to %d ms\n",
 846                                bond->dev->name, new_value, bond->params.miimon,
 847                                (new_value / bond->params.miimon) *
 848                                bond->params.miimon);
 849                 }
 850                 bond->params.downdelay = new_value / bond->params.miimon;
 851                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 852                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 853
 854         }
 855
 856 out:
 857         return ret;
 858 }
 859 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 860
 861 static ssize_t bonding_show_updelay(struct device *d,
 862                                     struct device_attribute *attr,
 863                                     char *buf)
 864 {
 865         struct bonding *bond = to_bond(d);
 866
 867         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 868
 869 }
 870
 871 static ssize_t bonding_store_updelay(struct device *d,
 872                                      struct device_attribute *attr,
 873                                      const char *buf, size_t count)
 874 {
 875         int new_value, ret = count;
 876         struct bonding *bond = to_bond(d);
 877
 878         if (!(bond->params.miimon)) {
 879                 printk(KERN_ERR DRV_NAME
 880                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 881                        bond->dev->name);
 882                 ret = -EPERM;
 883                 goto out;
 884         }
 885
 886         if (sscanf(buf, "%d", &new_value) != 1) {
 887                 printk(KERN_ERR DRV_NAME
 888                        ": %s: no up delay value specified.\n",
 889                        bond->dev->name);
 890                 ret = -EINVAL;
 891                 goto out;
 892         }
 893         if (new_value < 0) {
 894                 printk(KERN_ERR DRV_NAME
 895                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 896                        bond->dev->name, new_value, 1, INT_MAX);
 897                 ret = -EINVAL;
 898                 goto out;
 899         } else {
 900                 if ((new_value % bond->params.miimon) != 0) {
 901                         printk(KERN_WARNING DRV_NAME
 902                                ": %s: Warning: up delay (%d) is not a multiple "
 903                                "of miimon (%d), updelay rounded to %d ms\n",
 904                                bond->dev->name, new_value, bond->params.miimon,
 905                                (new_value / bond->params.miimon) *
 906                                bond->params.miimon);
 907                 }
 908                 bond->params.updelay = new_value / bond->params.miimon;
 909                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 910                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 911
 912         }
 913
 914 out:
 915         return ret;
 916 }
 917 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 918
 919 /*
 920  * Show and set the LACP interval.  Interface must be down, and the mode
 921  * must be set to 802.3ad mode.
 922  */
 923 static ssize_t bonding_show_lacp(struct device *d,
 924                                  struct device_attribute *attr,
 925                                  char *buf)
 926 {
 927         struct bonding *bond = to_bond(d);
 928
 929         return sprintf(buf, "%s %d\n",
 930                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 931                 bond->params.lacp_fast);
 932 }
 933
 934 static ssize_t bonding_store_lacp(struct device *d,
 935                                   struct device_attribute *attr,
 936                                   const char *buf, size_t count)
 937 {
 938         int new_value, ret = count;
 939         struct bonding *bond = to_bond(d);
 940
 941         if (bond->dev->flags & IFF_UP) {
 942                 printk(KERN_ERR DRV_NAME
 943                        ": %s: Unable to update LACP rate because interface is up.\n",
 944                        bond->dev->name);
 945                 ret = -EPERM;
 946                 goto out;
 947         }
 948
 949         if (bond->params.mode != BOND_MODE_8023AD) {
 950                 printk(KERN_ERR DRV_NAME
 951                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 952                        bond->dev->name);
 953                 ret = -EPERM;
 954                 goto out;
 955         }
 956
 957         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 958
 959         if ((new_value == 1) || (new_value == 0)) {
 960                 bond->params.lacp_fast = new_value;
 961                 printk(KERN_INFO DRV_NAME
 962                        ": %s: Setting LACP rate to %s (%d).\n",
 963                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 964         } else {
 965                 printk(KERN_ERR DRV_NAME
 966                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 967                         bond->dev->name, (int)strlen(buf) - 1, buf);
 968                 ret = -EINVAL;
 969         }
 970 out:
 971         return ret;
 972 }
 973 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 974
 975 /*
 976  * Show and set the MII monitor interval.  There are two tricky bits
 977  * here.  First, if MII monitoring is activated, then we must disable
 978  * ARP monitoring.  Second, if the timer isn't running, we must
 979  * start it.
 980  */
 981 static ssize_t bonding_show_miimon(struct device *d,
 982                                    struct device_attribute *attr,
 983                                    char *buf)
 984 {
 985         struct bonding *bond = to_bond(d);
 986
 987         return sprintf(buf, "%d\n", bond->params.miimon);
 988 }
 989
 990 static ssize_t bonding_store_miimon(struct device *d,
 991                                     struct device_attribute *attr,
 992                                     const char *buf, size_t count)
 993 {
 994         int new_value, ret = count;
 995         struct bonding *bond = to_bond(d);
 996
 997         if (sscanf(buf, "%d", &new_value) != 1) {
 998                 printk(KERN_ERR DRV_NAME
 999                        ": %s: no miimon value specified.\n",
1000                        bond->dev->name);
1001                 ret = -EINVAL;
1002                 goto out;
1003         }
1004         if (new_value < 0) {
1005                 printk(KERN_ERR DRV_NAME
1006                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1007                        bond->dev->name, new_value, 1, INT_MAX);
1008                 ret = -EINVAL;
1009                 goto out;
1010         } else {
1011                 printk(KERN_INFO DRV_NAME
1012                        ": %s: Setting MII monitoring interval to %d.\n",
1013                        bond->dev->name, new_value);
1014                 bond->params.miimon = new_value;
1015                 if(bond->params.updelay)
1016                         printk(KERN_INFO DRV_NAME
1017                               ": %s: Note: Updating updelay (to %d) "
1018                               "since it is a multiple of the miimon value.\n",
1019                               bond->dev->name,
1020                               bond->params.updelay * bond->params.miimon);
1021                 if(bond->params.downdelay)
1022                         printk(KERN_INFO DRV_NAME
1023                               ": %s: Note: Updating downdelay (to %d) "
1024                               "since it is a multiple of the miimon value.\n",
1025                               bond->dev->name,
1026                               bond->params.downdelay * bond->params.miimon);
1027                 if (bond->params.arp_interval) {
1028                         printk(KERN_INFO DRV_NAME
1029                                ": %s: MII monitoring cannot be used with "
1030                                "ARP monitoring. Disabling ARP monitoring...\n",
1031                                bond->dev->name);
1032                         bond->params.arp_interval = 0;
1033                         if (bond->params.arp_validate) {
1034                                 bond_unregister_arp(bond);
1035                                 bond->params.arp_validate =
1036                                         BOND_ARP_VALIDATE_NONE;
1037                         }
1038                         if (delayed_work_pending(&bond->arp_work)) {
1039                                 cancel_delayed_work(&bond->arp_work);
1040                                 flush_workqueue(bond->wq);
1041                         }
1042                 }
1043
1044                 if (bond->dev->flags & IFF_UP) {
1045                         /* If the interface is up, we may need to fire off
1046                          * the MII timer. If the interface is down, the
1047                          * timer will get fired off when the open function
1048                          * is called.
1049                          */
1050                         if (!delayed_work_pending(&bond->mii_work)) {
1051                                 INIT_DELAYED_WORK(&bond->mii_work,
1052                                                   bond_mii_monitor);
1053                                 queue_delayed_work(bond->wq,
1054                                                    &bond->mii_work, 0);
1055                         }
1056                 }
1057         }
1058 out:
1059         return ret;
1060 }
1061 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1062
1063 /*
1064  * Show and set the primary slave.  The store function is much
1065  * simpler than bonding_store_slaves function because it only needs to
1066  * handle one interface name.
1067  * The bond must be a mode that supports a primary for this be
1068  * set.
1069  */
1070 static ssize_t bonding_show_primary(struct device *d,
1071                                     struct device_attribute *attr,
1072                                     char *buf)
1073 {
1074         int count = 0;
1075         struct bonding *bond = to_bond(d);
1076
1077         if (bond->primary_slave)
1078                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1079
1080         return count;
1081 }
1082
1083 static ssize_t bonding_store_primary(struct device *d,
1084                                      struct device_attribute *attr,
1085                                      const char *buf, size_t count)
1086 {
1087         int i;
1088         struct slave *slave;
1089         struct bonding *bond = to_bond(d);
1090
1091         write_lock_bh(&bond->lock);
1092         if (!USES_PRIMARY(bond->params.mode)) {
1093                 printk(KERN_INFO DRV_NAME
1094                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1095                        bond->dev->name, bond->dev->name, bond->params.mode);
1096         } else {
1097                 bond_for_each_slave(bond, slave, i) {
1098                         if (strnicmp
1099                             (slave->dev->name, buf,
1100                              strlen(slave->dev->name)) == 0) {
1101                                 printk(KERN_INFO DRV_NAME
1102                                        ": %s: Setting %s as primary slave.\n",
1103                                        bond->dev->name, slave->dev->name);
1104                                 bond->primary_slave = slave;
1105                                 bond_select_active_slave(bond);
1106                                 goto out;
1107                         }
1108                 }
1109
1110                 /* if we got here, then we didn't match the name of any slave */
1111
1112                 if (strlen(buf) == 0 || buf[0] == '\n') {
1113                         printk(KERN_INFO DRV_NAME
1114                                ": %s: Setting primary slave to None.\n",
1115                                bond->dev->name);
1116                         bond->primary_slave = NULL;
1117                                 bond_select_active_slave(bond);
1118                 } else {
1119                         printk(KERN_INFO DRV_NAME
1120                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1121                                bond->dev->name, (int)strlen(buf) - 1, buf);
1122                 }
1123         }
1124 out:
1125         write_unlock_bh(&bond->lock);
1126
1127         rtnl_unlock();
1128
1129         return count;
1130 }
1131 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1132
1133 /*
1134  * Show and set the use_carrier flag.
1135  */
1136 static ssize_t bonding_show_carrier(struct device *d,
1137                                     struct device_attribute *attr,
1138                                     char *buf)
1139 {
1140         struct bonding *bond = to_bond(d);
1141
1142         return sprintf(buf, "%d\n", bond->params.use_carrier);
1143 }
1144
1145 static ssize_t bonding_store_carrier(struct device *d,
1146                                      struct device_attribute *attr,
1147                                      const char *buf, size_t count)
1148 {
1149         int new_value, ret = count;
1150         struct bonding *bond = to_bond(d);
1151
1152
1153         if (sscanf(buf, "%d", &new_value) != 1) {
1154                 printk(KERN_ERR DRV_NAME
1155                        ": %s: no use_carrier value specified.\n",
1156                        bond->dev->name);
1157                 ret = -EINVAL;
1158                 goto out;
1159         }
1160         if ((new_value == 0) || (new_value == 1)) {
1161                 bond->params.use_carrier = new_value;
1162                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1163                        bond->dev->name, new_value);
1164         } else {
1165                 printk(KERN_INFO DRV_NAME
1166                        ": %s: Ignoring invalid use_carrier value %d.\n",
1167                        bond->dev->name, new_value);
1168         }
1169 out:
1170         return count;
1171 }
1172 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1173
1174
1175 /*
1176  * Show and set currently active_slave.
1177  */
1178 static ssize_t bonding_show_active_slave(struct device *d,
1179                                          struct device_attribute *attr,
1180                                          char *buf)
1181 {
1182         struct slave *curr;
1183         struct bonding *bond = to_bond(d);
1184         int count = 0;
1185
1186         read_lock(&bond->curr_slave_lock);
1187         curr = bond->curr_active_slave;
1188         read_unlock(&bond->curr_slave_lock);
1189
1190         if (USES_PRIMARY(bond->params.mode) && curr)
1191                 count = sprintf(buf, "%s\n", curr->dev->name);
1192         return count;
1193 }
1194
1195 static ssize_t bonding_store_active_slave(struct device *d,
1196                                           struct device_attribute *attr,
1197                                           const char *buf, size_t count)
1198 {
1199         int i;
1200         struct slave *slave;
1201         struct slave *old_active = NULL;
1202         struct slave *new_active = NULL;
1203         struct bonding *bond = to_bond(d);
1204
1205         rtnl_lock();
1206         write_lock_bh(&bond->lock);
1207
1208         if (!USES_PRIMARY(bond->params.mode)) {
1209                 printk(KERN_INFO DRV_NAME
1210                        ": %s: Unable to change active slave; %s is in mode %d\n",
1211                        bond->dev->name, bond->dev->name, bond->params.mode);
1212         } else {
1213                 bond_for_each_slave(bond, slave, i) {
1214                         if (strnicmp
1215                             (slave->dev->name, buf,
1216                              strlen(slave->dev->name)) == 0) {
1217                                 old_active = bond->curr_active_slave;
1218                                 new_active = slave;
1219                                 if (new_active == old_active) {
1220                                         /* do nothing */
1221                                         printk(KERN_INFO DRV_NAME
1222                                                ": %s: %s is already the current active slave.\n",
1223                                                bond->dev->name, slave->dev->name);
1224                                         goto out;
1225                                 }
1226                                 else {
1227                                         if ((new_active) &&
1228                                             (old_active) &&
1229                                             (new_active->link == BOND_LINK_UP) &&
1230                                             IS_UP(new_active->dev)) {
1231                                                 printk(KERN_INFO DRV_NAME
1232                                                       ": %s: Setting %s as active slave.\n",
1233                                                       bond->dev->name, slave->dev->name);
1234                                                 bond_change_active_slave(bond, new_active);
1235                                         }
1236                                         else {
1237                                                 printk(KERN_INFO DRV_NAME
1238                                                       ": %s: Could not set %s as active slave; "
1239                                                       "either %s is down or the link is down.\n",
1240                                                       bond->dev->name, slave->dev->name,
1241                                                       slave->dev->name);
1242                                         }
1243                                         goto out;
1244                                 }
1245                         }
1246                 }
1247
1248                 /* if we got here, then we didn't match the name of any slave */
1249
1250                 if (strlen(buf) == 0 || buf[0] == '\n') {
1251                         printk(KERN_INFO DRV_NAME
1252                                ": %s: Setting active slave to None.\n",
1253                                bond->dev->name);
1254                         bond->primary_slave = NULL;
1255                                 bond_select_active_slave(bond);
1256                 } else {
1257                         printk(KERN_INFO DRV_NAME
1258                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1259                                bond->dev->name, (int)strlen(buf) - 1, buf);
1260                 }
1261         }
1262 out:
1263         write_unlock_bh(&bond->lock);
1264         rtnl_unlock();
1265
1266         return count;
1267
1268 }
1269 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1270
1271
1272 /*
1273  * Show link status of the bond interface.
1274  */
1275 static ssize_t bonding_show_mii_status(struct device *d,
1276                                        struct device_attribute *attr,
1277                                        char *buf)
1278 {
1279         struct slave *curr;
1280         struct bonding *bond = to_bond(d);
1281
1282         read_lock(&bond->curr_slave_lock);
1283         curr = bond->curr_active_slave;
1284         read_unlock(&bond->curr_slave_lock);
1285
1286         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1287 }
1288 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1289
1290
1291 /*
1292  * Show current 802.3ad aggregator ID.
1293  */
1294 static ssize_t bonding_show_ad_aggregator(struct device *d,
1295                                           struct device_attribute *attr,
1296                                           char *buf)
1297 {
1298         int count = 0;
1299         struct bonding *bond = to_bond(d);
1300
1301         if (bond->params.mode == BOND_MODE_8023AD) {
1302                 struct ad_info ad_info;
1303                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1304         }
1305
1306         return count;
1307 }
1308 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1309
1310
1311 /*
1312  * Show number of active 802.3ad ports.
1313  */
1314 static ssize_t bonding_show_ad_num_ports(struct device *d,
1315                                          struct device_attribute *attr,
1316                                          char *buf)
1317 {
1318         int count = 0;
1319         struct bonding *bond = to_bond(d);
1320
1321         if (bond->params.mode == BOND_MODE_8023AD) {
1322                 struct ad_info ad_info;
1323                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1324         }
1325
1326         return count;
1327 }
1328 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1329
1330
1331 /*
1332  * Show current 802.3ad actor key.
1333  */
1334 static ssize_t bonding_show_ad_actor_key(struct device *d,
1335                                          struct device_attribute *attr,
1336                                          char *buf)
1337 {
1338         int count = 0;
1339         struct bonding *bond = to_bond(d);
1340
1341         if (bond->params.mode == BOND_MODE_8023AD) {
1342                 struct ad_info ad_info;
1343                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1344         }
1345
1346         return count;
1347 }
1348 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1349
1350
1351 /*
1352  * Show current 802.3ad partner key.
1353  */
1354 static ssize_t bonding_show_ad_partner_key(struct device *d,
1355                                            struct device_attribute *attr,
1356                                            char *buf)
1357 {
1358         int count = 0;
1359         struct bonding *bond = to_bond(d);
1360
1361         if (bond->params.mode == BOND_MODE_8023AD) {
1362                 struct ad_info ad_info;
1363                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1364         }
1365
1366         return count;
1367 }
1368 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1369
1370
1371 /*
1372  * Show current 802.3ad partner mac.
1373  */
1374 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1375                                            struct device_attribute *attr,
1376                                            char *buf)
1377 {
1378         int count = 0;
1379         struct bonding *bond = to_bond(d);
1380         DECLARE_MAC_BUF(mac);
1381
1382         if (bond->params.mode == BOND_MODE_8023AD) {
1383                 struct ad_info ad_info;
1384                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1385                         count = sprintf(buf,"%s\n",
1386                                         print_mac(mac, ad_info.partner_system));
1387                 }
1388         }
1389
1390         return count;
1391 }
1392 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1393
1394
1395
1396 static struct attribute *per_bond_attrs[] = {
1397         &dev_attr_slaves.attr,
1398         &dev_attr_mode.attr,
1399         &dev_attr_fail_over_mac.attr,
1400         &dev_attr_arp_validate.attr,
1401         &dev_attr_arp_interval.attr,
1402         &dev_attr_arp_ip_target.attr,
1403         &dev_attr_downdelay.attr,
1404         &dev_attr_updelay.attr,
1405         &dev_attr_lacp_rate.attr,
1406         &dev_attr_xmit_hash_policy.attr,
1407         &dev_attr_miimon.attr,
1408         &dev_attr_primary.attr,
1409         &dev_attr_use_carrier.attr,
1410         &dev_attr_active_slave.attr,
1411         &dev_attr_mii_status.attr,
1412         &dev_attr_ad_aggregator.attr,
1413         &dev_attr_ad_num_ports.attr,
1414         &dev_attr_ad_actor_key.attr,
1415         &dev_attr_ad_partner_key.attr,
1416         &dev_attr_ad_partner_mac.attr,
1417         NULL,
1418 };
1419
1420 static struct attribute_group bonding_group = {
1421         .name = "bonding",
1422         .attrs = per_bond_attrs,
1423 };
1424
1425 /*
1426  * Initialize sysfs.  This sets up the bonding_masters file in
1427  * /sys/class/net.
1428  */
1429 int bond_create_sysfs(void)
1430 {
1431         int ret = 0;
1432         struct bonding *firstbond;
1433
1434         init_rwsem(&bonding_rwsem);
1435
1436         /* get the netdev class pointer */
1437         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1438         if (!firstbond)
1439                 return -ENODEV;
1440
1441         netdev_class = firstbond->dev->dev.class;
1442         if (!netdev_class)
1443                 return -ENODEV;
1444
1445         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1446         /*
1447          * Permit multiple loads of the module by ignoring failures to
1448          * create the bonding_masters sysfs file.  Bonding devices
1449          * created by second or subsequent loads of the module will
1450          * not be listed in, or controllable by, bonding_masters, but
1451          * will have the usual "bonding" sysfs directory.
1452          *
1453          * This is done to preserve backwards compatibility for
1454          * initscripts/sysconfig, which load bonding multiple times to
1455          * configure multiple bonding devices.
1456          */
1457         if (ret == -EEXIST) {
1458                 netdev_class = NULL;
1459                 return 0;
1460         }
1461
1462         return ret;
1463
1464 }
1465
1466 /*
1467  * Remove /sys/class/net/bonding_masters.
1468  */
1469 void bond_destroy_sysfs(void)
1470 {
1471         if (netdev_class)
1472                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1473 }
1474
1475 /*
1476  * Initialize sysfs for each bond.  This sets up and registers
1477  * the 'bondctl' directory for each individual bond under /sys/class/net.
1478  */
1479 int bond_create_sysfs_entry(struct bonding *bond)
1480 {
1481         struct net_device *dev = bond->dev;
1482         int err;
1483
1484         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1485         if (err) {
1486                 printk(KERN_EMERG "eek! didn't create group!\n");
1487         }
1488
1489         if (expected_refcount < 1)
1490                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1491
1492         return err;
1493 }
1494 /*
1495  * Remove sysfs entries for each bond.
1496  */
1497 void bond_destroy_sysfs_entry(struct bonding *bond)
1498 {
1499         struct net_device *dev = bond->dev;
1500
1501         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1502 }
1503