drivers/net/bonding/bond_sysfs.c

   1 /*
   2  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <linux/sched.h>
  29 #include <linux/sysdev.h>
  30 #include <linux/fs.h>
  31 #include <linux/types.h>
  32 #include <linux/string.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/inetdevice.h>
  35 #include <linux/in.h>
  36 #include <linux/sysfs.h>
  37 #include <linux/ctype.h>
  38 #include <linux/inet.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/etherdevice.h>
  41 #include <net/net_namespace.h>
  42 #include <net/netns/generic.h>
  43 #include <linux/nsproxy.h>
  44
  45 #include "bonding.h"
  46
  47 #define to_dev(obj)     container_of(obj, struct device, kobj)
  48 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  49
  50 /*
  51  * "show" function for the bond_masters attribute.
  52  * The class parameter is ignored.
  53  */
  54 static ssize_t bonding_show_bonds(struct class *cls,
  55                                   struct class_attribute *attr,
  56                                   char *buf)
  57 {
  58         struct net *net = current->nsproxy->net_ns;
  59         struct bond_net *bn = net_generic(net, bond_net_id);
  60         int res = 0;
  61         struct bonding *bond;
  62
  63         rtnl_lock();
  64
  65         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  66                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  67                         /* not enough space for another interface name */
  68                         if ((PAGE_SIZE - res) > 10)
  69                                 res = PAGE_SIZE - 10;
  70                         res += sprintf(buf + res, "++more++ ");
  71                         break;
  72                 }
  73                 res += sprintf(buf + res, "%s ", bond->dev->name);
  74         }
  75         if (res)
  76                 buf[res-1] = '\n'; /* eat the leftover space */
  77
  78         rtnl_unlock();
  79         return res;
  80 }
  81
  82 static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
  83 {
  84         struct bond_net *bn = net_generic(net, bond_net_id);
  85         struct bonding *bond;
  86
  87         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  88                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  89                         return bond->dev;
  90         }
  91         return NULL;
  92 }
  93
  94 /*
  95  * "store" function for the bond_masters attribute.  This is what
  96  * creates and deletes entire bonds.
  97  *
  98  * The class parameter is ignored.
  99  *
 100  */
 101
 102 static ssize_t bonding_store_bonds(struct class *cls,
 103                                    struct class_attribute *attr,
 104                                    const char *buffer, size_t count)
 105 {
 106         struct net *net = current->nsproxy->net_ns;
 107         char command[IFNAMSIZ + 1] = {0, };
 108         char *ifname;
 109         int rv, res = count;
 110
 111         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 112         ifname = command + 1;
 113         if ((strlen(command) <= 1) ||
 114             !dev_valid_name(ifname))
 115                 goto err_no_cmd;
 116
 117         if (command[0] == '+') {
 118                 pr_info("%s is being created...\n", ifname);
 119                 rv = bond_create(net, ifname);
 120                 if (rv) {
 121                         pr_info("Bond creation failed.\n");
 122                         res = rv;
 123                 }
 124         } else if (command[0] == '-') {
 125                 struct net_device *bond_dev;
 126
 127                 rtnl_lock();
 128                 bond_dev = bond_get_by_name(net, ifname);
 129                 if (bond_dev) {
 130                         pr_info("%s is being deleted...\n", ifname);
 131                         unregister_netdevice(bond_dev);
 132                 } else {
 133                         pr_err("unable to delete non-existent %s\n", ifname);
 134                         res = -ENODEV;
 135                 }
 136                 rtnl_unlock();
 137         } else
 138                 goto err_no_cmd;
 139
 140         /* Always return either count or an error.  If you return 0, you'll
 141          * get called forever, which is bad.
 142          */
 143         return res;
 144
 145 err_no_cmd:
 146         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 147         return -EPERM;
 148 }
 149
 150 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 151 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 152                   bonding_show_bonds, bonding_store_bonds);
 153
 154 int bond_create_slave_symlinks(struct net_device *master,
 155                                struct net_device *slave)
 156 {
 157         char linkname[IFNAMSIZ+7];
 158         int ret = 0;
 159
 160         /* first, create a link from the slave back to the master */
 161         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 162                                 "master");
 163         if (ret)
 164                 return ret;
 165         /* next, create a link from the master to the slave */
 166         sprintf(linkname, "slave_%s", slave->name);
 167         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 168                                 linkname);
 169         return ret;
 170
 171 }
 172
 173 void bond_destroy_slave_symlinks(struct net_device *master,
 174                                  struct net_device *slave)
 175 {
 176         char linkname[IFNAMSIZ+7];
 177
 178         sysfs_remove_link(&(slave->dev.kobj), "master");
 179         sprintf(linkname, "slave_%s", slave->name);
 180         sysfs_remove_link(&(master->dev.kobj), linkname);
 181 }
 182
 183
 184 /*
 185  * Show the slaves in the current bond.
 186  */
 187 static ssize_t bonding_show_slaves(struct device *d,
 188                                    struct device_attribute *attr, char *buf)
 189 {
 190         struct slave *slave;
 191         int i, res = 0;
 192         struct bonding *bond = to_bond(d);
 193
 194         read_lock(&bond->lock);
 195         bond_for_each_slave(bond, slave, i) {
 196                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 197                         /* not enough space for another interface name */
 198                         if ((PAGE_SIZE - res) > 10)
 199                                 res = PAGE_SIZE - 10;
 200                         res += sprintf(buf + res, "++more++ ");
 201                         break;
 202                 }
 203                 res += sprintf(buf + res, "%s ", slave->dev->name);
 204         }
 205         read_unlock(&bond->lock);
 206         if (res)
 207                 buf[res-1] = '\n'; /* eat the leftover space */
 208         return res;
 209 }
 210
 211 /*
 212  * Set the slaves in the current bond.  The bond interface must be
 213  * up for this to succeed.
 214  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 215  * All hard work should be done there.
 216  */
 217 static ssize_t bonding_store_slaves(struct device *d,
 218                                     struct device_attribute *attr,
 219                                     const char *buffer, size_t count)
 220 {
 221         char command[IFNAMSIZ + 1] = { 0, };
 222         char *ifname;
 223         int res, ret = count;
 224         struct net_device *dev;
 225         struct bonding *bond = to_bond(d);
 226
 227         /* Quick sanity check -- is the bond interface up? */
 228         if (!(bond->dev->flags & IFF_UP)) {
 229                 pr_warning("%s: doing slave updates when interface is down.\n",
 230                            bond->dev->name);
 231         }
 232
 233         if (!rtnl_trylock())
 234                 return restart_syscall();
 235
 236         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 237         ifname = command + 1;
 238         if ((strlen(command) <= 1) ||
 239             !dev_valid_name(ifname))
 240                 goto err_no_cmd;
 241
 242         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 243         if (!dev) {
 244                 pr_info("%s: Interface %s does not exist!\n",
 245                         bond->dev->name, ifname);
 246                 ret = -ENODEV;
 247                 goto out;
 248         }
 249
 250         switch (command[0]) {
 251         case '+':
 252                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 253                 res = bond_enslave(bond->dev, dev);
 254                 break;
 255
 256         case '-':
 257                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 258                 res = bond_release(bond->dev, dev);
 259                 break;
 260
 261         default:
 262                 goto err_no_cmd;
 263         }
 264
 265         if (res)
 266                 ret = res;
 267         goto out;
 268
 269 err_no_cmd:
 270         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 271                bond->dev->name);
 272         ret = -EPERM;
 273
 274 out:
 275         rtnl_unlock();
 276         return ret;
 277 }
 278
 279 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 280                    bonding_store_slaves);
 281
 282 /*
 283  * Show and set the bonding mode.  The bond interface must be down to
 284  * change the mode.
 285  */
 286 static ssize_t bonding_show_mode(struct device *d,
 287                                  struct device_attribute *attr, char *buf)
 288 {
 289         struct bonding *bond = to_bond(d);
 290
 291         return sprintf(buf, "%s %d\n",
 292                         bond_mode_tbl[bond->params.mode].modename,
 293                         bond->params.mode);
 294 }
 295
 296 static ssize_t bonding_store_mode(struct device *d,
 297                                   struct device_attribute *attr,
 298                                   const char *buf, size_t count)
 299 {
 300         int new_value, ret = count;
 301         struct bonding *bond = to_bond(d);
 302
 303         if (bond->dev->flags & IFF_UP) {
 304                 pr_err("unable to update mode of %s because interface is up.\n",
 305                        bond->dev->name);
 306                 ret = -EPERM;
 307                 goto out;
 308         }
 309
 310         new_value = bond_parse_parm(buf, bond_mode_tbl);
 311         if (new_value < 0)  {
 312                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 313                        bond->dev->name, (int)strlen(buf) - 1, buf);
 314                 ret = -EINVAL;
 315                 goto out;
 316         }
 317         if ((new_value == BOND_MODE_ALB ||
 318              new_value == BOND_MODE_TLB) &&
 319             bond->params.arp_interval) {
 320                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 321                        bond->dev->name, bond_mode_tbl[new_value].modename);
 322                 ret = -EINVAL;
 323                 goto out;
 324         }
 325         if (bond->params.mode == BOND_MODE_8023AD)
 326                 bond_unset_master_3ad_flags(bond);
 327
 328         if (bond->params.mode == BOND_MODE_ALB)
 329                 bond_unset_master_alb_flags(bond);
 330
 331         bond->params.mode = new_value;
 332         bond_set_mode_ops(bond, bond->params.mode);
 333         pr_info("%s: setting mode to %s (%d).\n",
 334                 bond->dev->name, bond_mode_tbl[new_value].modename,
 335                 new_value);
 336 out:
 337         return ret;
 338 }
 339 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 340                    bonding_show_mode, bonding_store_mode);
 341
 342 /*
 343  * Show and set the bonding transmit hash method.
 344  * The bond interface must be down to change the xmit hash policy.
 345  */
 346 static ssize_t bonding_show_xmit_hash(struct device *d,
 347                                       struct device_attribute *attr,
 348                                       char *buf)
 349 {
 350         struct bonding *bond = to_bond(d);
 351
 352         return sprintf(buf, "%s %d\n",
 353                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 354                        bond->params.xmit_policy);
 355 }
 356
 357 static ssize_t bonding_store_xmit_hash(struct device *d,
 358                                        struct device_attribute *attr,
 359                                        const char *buf, size_t count)
 360 {
 361         int new_value, ret = count;
 362         struct bonding *bond = to_bond(d);
 363
 364         if (bond->dev->flags & IFF_UP) {
 365                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 366                        bond->dev->name);
 367                 ret = -EPERM;
 368                 goto out;
 369         }
 370
 371         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 372         if (new_value < 0)  {
 373                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 374                        bond->dev->name,
 375                        (int)strlen(buf) - 1, buf);
 376                 ret = -EINVAL;
 377                 goto out;
 378         } else {
 379                 bond->params.xmit_policy = new_value;
 380                 bond_set_mode_ops(bond, bond->params.mode);
 381                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 382                         bond->dev->name,
 383                         xmit_hashtype_tbl[new_value].modename, new_value);
 384         }
 385 out:
 386         return ret;
 387 }
 388 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 389                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 390
 391 /*
 392  * Show and set arp_validate.
 393  */
 394 static ssize_t bonding_show_arp_validate(struct device *d,
 395                                          struct device_attribute *attr,
 396                                          char *buf)
 397 {
 398         struct bonding *bond = to_bond(d);
 399
 400         return sprintf(buf, "%s %d\n",
 401                        arp_validate_tbl[bond->params.arp_validate].modename,
 402                        bond->params.arp_validate);
 403 }
 404
 405 static ssize_t bonding_store_arp_validate(struct device *d,
 406                                           struct device_attribute *attr,
 407                                           const char *buf, size_t count)
 408 {
 409         int new_value;
 410         struct bonding *bond = to_bond(d);
 411
 412         new_value = bond_parse_parm(buf, arp_validate_tbl);
 413         if (new_value < 0) {
 414                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 415                        bond->dev->name, buf);
 416                 return -EINVAL;
 417         }
 418         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 419                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 420                        bond->dev->name);
 421                 return -EINVAL;
 422         }
 423         pr_info("%s: setting arp_validate to %s (%d).\n",
 424                 bond->dev->name, arp_validate_tbl[new_value].modename,
 425                 new_value);
 426
 427         if (!bond->params.arp_validate && new_value)
 428                 bond_register_arp(bond);
 429         else if (bond->params.arp_validate && !new_value)
 430                 bond_unregister_arp(bond);
 431
 432         bond->params.arp_validate = new_value;
 433
 434         return count;
 435 }
 436
 437 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 438                    bonding_store_arp_validate);
 439
 440 /*
 441  * Show and store fail_over_mac.  User only allowed to change the
 442  * value when there are no slaves.
 443  */
 444 static ssize_t bonding_show_fail_over_mac(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                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 452                        bond->params.fail_over_mac);
 453 }
 454
 455 static ssize_t bonding_store_fail_over_mac(struct device *d,
 456                                            struct device_attribute *attr,
 457                                            const char *buf, size_t count)
 458 {
 459         int new_value;
 460         struct bonding *bond = to_bond(d);
 461
 462         if (bond->slave_cnt != 0) {
 463                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 464                        bond->dev->name);
 465                 return -EPERM;
 466         }
 467
 468         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 469         if (new_value < 0) {
 470                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 471                        bond->dev->name, buf);
 472                 return -EINVAL;
 473         }
 474
 475         bond->params.fail_over_mac = new_value;
 476         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 477                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 478                 new_value);
 479
 480         return count;
 481 }
 482
 483 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 484                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 485
 486 /*
 487  * Show and set the arp timer interval.  There are two tricky bits
 488  * here.  First, if ARP monitoring is activated, then we must disable
 489  * MII monitoring.  Second, if the ARP timer isn't running, we must
 490  * start it.
 491  */
 492 static ssize_t bonding_show_arp_interval(struct device *d,
 493                                          struct device_attribute *attr,
 494                                          char *buf)
 495 {
 496         struct bonding *bond = to_bond(d);
 497
 498         return sprintf(buf, "%d\n", bond->params.arp_interval);
 499 }
 500
 501 static ssize_t bonding_store_arp_interval(struct device *d,
 502                                           struct device_attribute *attr,
 503                                           const char *buf, size_t count)
 504 {
 505         int new_value, ret = count;
 506         struct bonding *bond = to_bond(d);
 507
 508         if (sscanf(buf, "%d", &new_value) != 1) {
 509                 pr_err("%s: no arp_interval value specified.\n",
 510                        bond->dev->name);
 511                 ret = -EINVAL;
 512                 goto out;
 513         }
 514         if (new_value < 0) {
 515                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 516                        bond->dev->name, new_value, INT_MAX);
 517                 ret = -EINVAL;
 518                 goto out;
 519         }
 520         if (bond->params.mode == BOND_MODE_ALB ||
 521             bond->params.mode == BOND_MODE_TLB) {
 522                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 523                         bond->dev->name, bond->dev->name);
 524                 ret = -EINVAL;
 525                 goto out;
 526         }
 527         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 528                 bond->dev->name, new_value);
 529         bond->params.arp_interval = new_value;
 530         if (bond->params.arp_interval)
 531                 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
 532         if (bond->params.miimon) {
 533                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 534                         bond->dev->name, bond->dev->name);
 535                 bond->params.miimon = 0;
 536                 if (delayed_work_pending(&bond->mii_work)) {
 537                         cancel_delayed_work(&bond->mii_work);
 538                         flush_workqueue(bond->wq);
 539                 }
 540         }
 541         if (!bond->params.arp_targets[0]) {
 542                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 543                         bond->dev->name);
 544         }
 545         if (bond->dev->flags & IFF_UP) {
 546                 /* If the interface is up, we may need to fire off
 547                  * the ARP timer.  If the interface is down, the
 548                  * timer will get fired off when the open function
 549                  * is called.
 550                  */
 551                 if (!delayed_work_pending(&bond->arp_work)) {
 552                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 553                                 INIT_DELAYED_WORK(&bond->arp_work,
 554                                                   bond_activebackup_arp_mon);
 555                         else
 556                                 INIT_DELAYED_WORK(&bond->arp_work,
 557                                                   bond_loadbalance_arp_mon);
 558
 559                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 560                 }
 561         }
 562
 563 out:
 564         return ret;
 565 }
 566 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 567                    bonding_show_arp_interval, bonding_store_arp_interval);
 568
 569 /*
 570  * Show and set the arp targets.
 571  */
 572 static ssize_t bonding_show_arp_targets(struct device *d,
 573                                         struct device_attribute *attr,
 574                                         char *buf)
 575 {
 576         int i, res = 0;
 577         struct bonding *bond = to_bond(d);
 578
 579         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 580                 if (bond->params.arp_targets[i])
 581                         res += sprintf(buf + res, "%pI4 ",
 582                                        &bond->params.arp_targets[i]);
 583         }
 584         if (res)
 585                 buf[res-1] = '\n'; /* eat the leftover space */
 586         return res;
 587 }
 588
 589 static ssize_t bonding_store_arp_targets(struct device *d,
 590                                          struct device_attribute *attr,
 591                                          const char *buf, size_t count)
 592 {
 593         __be32 newtarget;
 594         int i = 0, done = 0, ret = count;
 595         struct bonding *bond = to_bond(d);
 596         __be32 *targets;
 597
 598         targets = bond->params.arp_targets;
 599         newtarget = in_aton(buf + 1);
 600         /* look for adds */
 601         if (buf[0] == '+') {
 602                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 603                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 604                                bond->dev->name, &newtarget);
 605                         ret = -EINVAL;
 606                         goto out;
 607                 }
 608                 /* look for an empty slot to put the target in, and check for dupes */
 609                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 610                         if (targets[i] == newtarget) { /* duplicate */
 611                                 pr_err("%s: ARP target %pI4 is already present\n",
 612                                        bond->dev->name, &newtarget);
 613                                 ret = -EINVAL;
 614                                 goto out;
 615                         }
 616                         if (targets[i] == 0) {
 617                                 pr_info("%s: adding ARP target %pI4.\n",
 618                                         bond->dev->name, &newtarget);
 619                                 done = 1;
 620                                 targets[i] = newtarget;
 621                         }
 622                 }
 623                 if (!done) {
 624                         pr_err("%s: ARP target table is full!\n",
 625                                bond->dev->name);
 626                         ret = -EINVAL;
 627                         goto out;
 628                 }
 629
 630         } else if (buf[0] == '-')       {
 631                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 632                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 633                                bond->dev->name, &newtarget);
 634                         ret = -EINVAL;
 635                         goto out;
 636                 }
 637
 638                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 639                         if (targets[i] == newtarget) {
 640                                 int j;
 641                                 pr_info("%s: removing ARP target %pI4.\n",
 642                                         bond->dev->name, &newtarget);
 643                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 644                                         targets[j] = targets[j+1];
 645
 646                                 targets[j] = 0;
 647                                 done = 1;
 648                         }
 649                 }
 650                 if (!done) {
 651                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 652                                 bond->dev->name, &newtarget);
 653                         ret = -EINVAL;
 654                         goto out;
 655                 }
 656         } else {
 657                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 658                        bond->dev->name);
 659                 ret = -EPERM;
 660                 goto out;
 661         }
 662
 663 out:
 664         return ret;
 665 }
 666 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 667
 668 /*
 669  * Show and set the up and down delays.  These must be multiples of the
 670  * MII monitoring value, and are stored internally as the multiplier.
 671  * Thus, we must translate to MS for the real world.
 672  */
 673 static ssize_t bonding_show_downdelay(struct device *d,
 674                                       struct device_attribute *attr,
 675                                       char *buf)
 676 {
 677         struct bonding *bond = to_bond(d);
 678
 679         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 680 }
 681
 682 static ssize_t bonding_store_downdelay(struct device *d,
 683                                        struct device_attribute *attr,
 684                                        const char *buf, size_t count)
 685 {
 686         int new_value, ret = count;
 687         struct bonding *bond = to_bond(d);
 688
 689         if (!(bond->params.miimon)) {
 690                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 691                        bond->dev->name);
 692                 ret = -EPERM;
 693                 goto out;
 694         }
 695
 696         if (sscanf(buf, "%d", &new_value) != 1) {
 697                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 698                 ret = -EINVAL;
 699                 goto out;
 700         }
 701         if (new_value < 0) {
 702                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 703                        bond->dev->name, new_value, 1, INT_MAX);
 704                 ret = -EINVAL;
 705                 goto out;
 706         } else {
 707                 if ((new_value % bond->params.miimon) != 0) {
 708                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 709                                    bond->dev->name, new_value,
 710                                    bond->params.miimon,
 711                                    (new_value / bond->params.miimon) *
 712                                    bond->params.miimon);
 713                 }
 714                 bond->params.downdelay = new_value / bond->params.miimon;
 715                 pr_info("%s: Setting down delay to %d.\n",
 716                         bond->dev->name,
 717                         bond->params.downdelay * bond->params.miimon);
 718
 719         }
 720
 721 out:
 722         return ret;
 723 }
 724 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 725                    bonding_show_downdelay, bonding_store_downdelay);
 726
 727 static ssize_t bonding_show_updelay(struct device *d,
 728                                     struct device_attribute *attr,
 729                                     char *buf)
 730 {
 731         struct bonding *bond = to_bond(d);
 732
 733         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 734
 735 }
 736
 737 static ssize_t bonding_store_updelay(struct device *d,
 738                                      struct device_attribute *attr,
 739                                      const char *buf, size_t count)
 740 {
 741         int new_value, ret = count;
 742         struct bonding *bond = to_bond(d);
 743
 744         if (!(bond->params.miimon)) {
 745                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 746                        bond->dev->name);
 747                 ret = -EPERM;
 748                 goto out;
 749         }
 750
 751         if (sscanf(buf, "%d", &new_value) != 1) {
 752                 pr_err("%s: no up delay value specified.\n",
 753                        bond->dev->name);
 754                 ret = -EINVAL;
 755                 goto out;
 756         }
 757         if (new_value < 0) {
 758                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 759                        bond->dev->name, new_value, 1, INT_MAX);
 760                 ret = -EINVAL;
 761                 goto out;
 762         } else {
 763                 if ((new_value % bond->params.miimon) != 0) {
 764                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 765                                    bond->dev->name, new_value,
 766                                    bond->params.miimon,
 767                                    (new_value / bond->params.miimon) *
 768                                    bond->params.miimon);
 769                 }
 770                 bond->params.updelay = new_value / bond->params.miimon;
 771                 pr_info("%s: Setting up delay to %d.\n",
 772                         bond->dev->name,
 773                         bond->params.updelay * bond->params.miimon);
 774         }
 775
 776 out:
 777         return ret;
 778 }
 779 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 780                    bonding_show_updelay, bonding_store_updelay);
 781
 782 /*
 783  * Show and set the LACP interval.  Interface must be down, and the mode
 784  * must be set to 802.3ad mode.
 785  */
 786 static ssize_t bonding_show_lacp(struct device *d,
 787                                  struct device_attribute *attr,
 788                                  char *buf)
 789 {
 790         struct bonding *bond = to_bond(d);
 791
 792         return sprintf(buf, "%s %d\n",
 793                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 794                 bond->params.lacp_fast);
 795 }
 796
 797 static ssize_t bonding_store_lacp(struct device *d,
 798                                   struct device_attribute *attr,
 799                                   const char *buf, size_t count)
 800 {
 801         int new_value, ret = count;
 802         struct bonding *bond = to_bond(d);
 803
 804         if (bond->dev->flags & IFF_UP) {
 805                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 806                        bond->dev->name);
 807                 ret = -EPERM;
 808                 goto out;
 809         }
 810
 811         if (bond->params.mode != BOND_MODE_8023AD) {
 812                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 813                        bond->dev->name);
 814                 ret = -EPERM;
 815                 goto out;
 816         }
 817
 818         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 819
 820         if ((new_value == 1) || (new_value == 0)) {
 821                 bond->params.lacp_fast = new_value;
 822                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 823                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 824                         new_value);
 825         } else {
 826                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 827                        bond->dev->name, (int)strlen(buf) - 1, buf);
 828                 ret = -EINVAL;
 829         }
 830 out:
 831         return ret;
 832 }
 833 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 834                    bonding_show_lacp, bonding_store_lacp);
 835
 836 static ssize_t bonding_show_ad_select(struct device *d,
 837                                       struct device_attribute *attr,
 838                                       char *buf)
 839 {
 840         struct bonding *bond = to_bond(d);
 841
 842         return sprintf(buf, "%s %d\n",
 843                 ad_select_tbl[bond->params.ad_select].modename,
 844                 bond->params.ad_select);
 845 }
 846
 847
 848 static ssize_t bonding_store_ad_select(struct device *d,
 849                                        struct device_attribute *attr,
 850                                        const char *buf, size_t count)
 851 {
 852         int new_value, ret = count;
 853         struct bonding *bond = to_bond(d);
 854
 855         if (bond->dev->flags & IFF_UP) {
 856                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 857                        bond->dev->name);
 858                 ret = -EPERM;
 859                 goto out;
 860         }
 861
 862         new_value = bond_parse_parm(buf, ad_select_tbl);
 863
 864         if (new_value != -1) {
 865                 bond->params.ad_select = new_value;
 866                 pr_info("%s: Setting ad_select to %s (%d).\n",
 867                         bond->dev->name, ad_select_tbl[new_value].modename,
 868                         new_value);
 869         } else {
 870                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 871                        bond->dev->name, (int)strlen(buf) - 1, buf);
 872                 ret = -EINVAL;
 873         }
 874 out:
 875         return ret;
 876 }
 877 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 878                    bonding_show_ad_select, bonding_store_ad_select);
 879
 880 /*
 881  * Show and set the number of grat ARP to send after a failover event.
 882  */
 883 static ssize_t bonding_show_n_grat_arp(struct device *d,
 884                                    struct device_attribute *attr,
 885                                    char *buf)
 886 {
 887         struct bonding *bond = to_bond(d);
 888
 889         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
 890 }
 891
 892 static ssize_t bonding_store_n_grat_arp(struct device *d,
 893                                     struct device_attribute *attr,
 894                                     const char *buf, size_t count)
 895 {
 896         int new_value, ret = count;
 897         struct bonding *bond = to_bond(d);
 898
 899         if (sscanf(buf, "%d", &new_value) != 1) {
 900                 pr_err("%s: no num_grat_arp value specified.\n",
 901                        bond->dev->name);
 902                 ret = -EINVAL;
 903                 goto out;
 904         }
 905         if (new_value < 0 || new_value > 255) {
 906                 pr_err("%s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
 907                        bond->dev->name, new_value);
 908                 ret = -EINVAL;
 909                 goto out;
 910         } else {
 911                 bond->params.num_grat_arp = new_value;
 912         }
 913 out:
 914         return ret;
 915 }
 916 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 917                    bonding_show_n_grat_arp, bonding_store_n_grat_arp);
 918
 919 /*
 920  * Show and set the number of unsolicited NA's to send after a failover event.
 921  */
 922 static ssize_t bonding_show_n_unsol_na(struct device *d,
 923                                        struct device_attribute *attr,
 924                                        char *buf)
 925 {
 926         struct bonding *bond = to_bond(d);
 927
 928         return sprintf(buf, "%d\n", bond->params.num_unsol_na);
 929 }
 930
 931 static ssize_t bonding_store_n_unsol_na(struct device *d,
 932                                         struct device_attribute *attr,
 933                                         const char *buf, size_t count)
 934 {
 935         int new_value, ret = count;
 936         struct bonding *bond = to_bond(d);
 937
 938         if (sscanf(buf, "%d", &new_value) != 1) {
 939                 pr_err("%s: no num_unsol_na value specified.\n",
 940                        bond->dev->name);
 941                 ret = -EINVAL;
 942                 goto out;
 943         }
 944
 945         if (new_value < 0 || new_value > 255) {
 946                 pr_err("%s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
 947                        bond->dev->name, new_value);
 948                 ret = -EINVAL;
 949                 goto out;
 950         } else
 951                 bond->params.num_unsol_na = new_value;
 952 out:
 953         return ret;
 954 }
 955 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 956                    bonding_show_n_unsol_na, bonding_store_n_unsol_na);
 957
 958 /*
 959  * Show and set the MII monitor interval.  There are two tricky bits
 960  * here.  First, if MII monitoring is activated, then we must disable
 961  * ARP monitoring.  Second, if the timer isn't running, we must
 962  * start it.
 963  */
 964 static ssize_t bonding_show_miimon(struct device *d,
 965                                    struct device_attribute *attr,
 966                                    char *buf)
 967 {
 968         struct bonding *bond = to_bond(d);
 969
 970         return sprintf(buf, "%d\n", bond->params.miimon);
 971 }
 972
 973 static ssize_t bonding_store_miimon(struct device *d,
 974                                     struct device_attribute *attr,
 975                                     const char *buf, size_t count)
 976 {
 977         int new_value, ret = count;
 978         struct bonding *bond = to_bond(d);
 979
 980         if (sscanf(buf, "%d", &new_value) != 1) {
 981                 pr_err("%s: no miimon value specified.\n",
 982                        bond->dev->name);
 983                 ret = -EINVAL;
 984                 goto out;
 985         }
 986         if (new_value < 0) {
 987                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 988                        bond->dev->name, new_value, 1, INT_MAX);
 989                 ret = -EINVAL;
 990                 goto out;
 991         } else {
 992                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 993                         bond->dev->name, new_value);
 994                 bond->params.miimon = new_value;
 995                 if (bond->params.updelay)
 996                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 997                                 bond->dev->name,
 998                                 bond->params.updelay * bond->params.miimon);
 999                 if (bond->params.downdelay)
1000                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1001                                 bond->dev->name,
1002                                 bond->params.downdelay * bond->params.miimon);
1003                 if (bond->params.arp_interval) {
1004                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1005                                 bond->dev->name);
1006                         bond->params.arp_interval = 0;
1007                         bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1008                         if (bond->params.arp_validate) {
1009                                 bond_unregister_arp(bond);
1010                                 bond->params.arp_validate =
1011                                         BOND_ARP_VALIDATE_NONE;
1012                         }
1013                         if (delayed_work_pending(&bond->arp_work)) {
1014                                 cancel_delayed_work(&bond->arp_work);
1015                                 flush_workqueue(bond->wq);
1016                         }
1017                 }
1018
1019                 if (bond->dev->flags & IFF_UP) {
1020                         /* If the interface is up, we may need to fire off
1021                          * the MII timer. If the interface is down, the
1022                          * timer will get fired off when the open function
1023                          * is called.
1024                          */
1025                         if (!delayed_work_pending(&bond->mii_work)) {
1026                                 INIT_DELAYED_WORK(&bond->mii_work,
1027                                                   bond_mii_monitor);
1028                                 queue_delayed_work(bond->wq,
1029                                                    &bond->mii_work, 0);
1030                         }
1031                 }
1032         }
1033 out:
1034         return ret;
1035 }
1036 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1037                    bonding_show_miimon, bonding_store_miimon);
1038
1039 /*
1040  * Show and set the primary slave.  The store function is much
1041  * simpler than bonding_store_slaves function because it only needs to
1042  * handle one interface name.
1043  * The bond must be a mode that supports a primary for this be
1044  * set.
1045  */
1046 static ssize_t bonding_show_primary(struct device *d,
1047                                     struct device_attribute *attr,
1048                                     char *buf)
1049 {
1050         int count = 0;
1051         struct bonding *bond = to_bond(d);
1052
1053         if (bond->primary_slave)
1054                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1055
1056         return count;
1057 }
1058
1059 static ssize_t bonding_store_primary(struct device *d,
1060                                      struct device_attribute *attr,
1061                                      const char *buf, size_t count)
1062 {
1063         int i;
1064         struct slave *slave;
1065         struct bonding *bond = to_bond(d);
1066
1067         if (!rtnl_trylock())
1068                 return restart_syscall();
1069         read_lock(&bond->lock);
1070         write_lock_bh(&bond->curr_slave_lock);
1071
1072         if (!USES_PRIMARY(bond->params.mode)) {
1073                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1074                         bond->dev->name, bond->dev->name, bond->params.mode);
1075         } else {
1076                 bond_for_each_slave(bond, slave, i) {
1077                         if (strnicmp
1078                             (slave->dev->name, buf,
1079                              strlen(slave->dev->name)) == 0) {
1080                                 pr_info("%s: Setting %s as primary slave.\n",
1081                                         bond->dev->name, slave->dev->name);
1082                                 bond->primary_slave = slave;
1083                                 strcpy(bond->params.primary, slave->dev->name);
1084                                 bond_select_active_slave(bond);
1085                                 goto out;
1086                         }
1087                 }
1088
1089                 /* if we got here, then we didn't match the name of any slave */
1090
1091                 if (strlen(buf) == 0 || buf[0] == '\n') {
1092                         pr_info("%s: Setting primary slave to None.\n",
1093                                 bond->dev->name);
1094                         bond->primary_slave = NULL;
1095                                 bond_select_active_slave(bond);
1096                 } else {
1097                         pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1098                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1099                 }
1100         }
1101 out:
1102         write_unlock_bh(&bond->curr_slave_lock);
1103         read_unlock(&bond->lock);
1104         rtnl_unlock();
1105
1106         return count;
1107 }
1108 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1109                    bonding_show_primary, bonding_store_primary);
1110
1111 /*
1112  * Show and set the primary_reselect flag.
1113  */
1114 static ssize_t bonding_show_primary_reselect(struct device *d,
1115                                              struct device_attribute *attr,
1116                                              char *buf)
1117 {
1118         struct bonding *bond = to_bond(d);
1119
1120         return sprintf(buf, "%s %d\n",
1121                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1122                        bond->params.primary_reselect);
1123 }
1124
1125 static ssize_t bonding_store_primary_reselect(struct device *d,
1126                                               struct device_attribute *attr,
1127                                               const char *buf, size_t count)
1128 {
1129         int new_value, ret = count;
1130         struct bonding *bond = to_bond(d);
1131
1132         if (!rtnl_trylock())
1133                 return restart_syscall();
1134
1135         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1136         if (new_value < 0)  {
1137                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1138                        bond->dev->name,
1139                        (int) strlen(buf) - 1, buf);
1140                 ret = -EINVAL;
1141                 goto out;
1142         }
1143
1144         bond->params.primary_reselect = new_value;
1145         pr_info("%s: setting primary_reselect to %s (%d).\n",
1146                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1147                 new_value);
1148
1149         read_lock(&bond->lock);
1150         write_lock_bh(&bond->curr_slave_lock);
1151         bond_select_active_slave(bond);
1152         write_unlock_bh(&bond->curr_slave_lock);
1153         read_unlock(&bond->lock);
1154 out:
1155         rtnl_unlock();
1156         return ret;
1157 }
1158 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1159                    bonding_show_primary_reselect,
1160                    bonding_store_primary_reselect);
1161
1162 /*
1163  * Show and set the use_carrier flag.
1164  */
1165 static ssize_t bonding_show_carrier(struct device *d,
1166                                     struct device_attribute *attr,
1167                                     char *buf)
1168 {
1169         struct bonding *bond = to_bond(d);
1170
1171         return sprintf(buf, "%d\n", bond->params.use_carrier);
1172 }
1173
1174 static ssize_t bonding_store_carrier(struct device *d,
1175                                      struct device_attribute *attr,
1176                                      const char *buf, size_t count)
1177 {
1178         int new_value, ret = count;
1179         struct bonding *bond = to_bond(d);
1180
1181
1182         if (sscanf(buf, "%d", &new_value) != 1) {
1183                 pr_err("%s: no use_carrier value specified.\n",
1184                        bond->dev->name);
1185                 ret = -EINVAL;
1186                 goto out;
1187         }
1188         if ((new_value == 0) || (new_value == 1)) {
1189                 bond->params.use_carrier = new_value;
1190                 pr_info("%s: Setting use_carrier to %d.\n",
1191                         bond->dev->name, new_value);
1192         } else {
1193                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1194                         bond->dev->name, new_value);
1195         }
1196 out:
1197         return count;
1198 }
1199 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1200                    bonding_show_carrier, bonding_store_carrier);
1201
1202
1203 /*
1204  * Show and set currently active_slave.
1205  */
1206 static ssize_t bonding_show_active_slave(struct device *d,
1207                                          struct device_attribute *attr,
1208                                          char *buf)
1209 {
1210         struct slave *curr;
1211         struct bonding *bond = to_bond(d);
1212         int count = 0;
1213
1214         read_lock(&bond->curr_slave_lock);
1215         curr = bond->curr_active_slave;
1216         read_unlock(&bond->curr_slave_lock);
1217
1218         if (USES_PRIMARY(bond->params.mode) && curr)
1219                 count = sprintf(buf, "%s\n", curr->dev->name);
1220         return count;
1221 }
1222
1223 static ssize_t bonding_store_active_slave(struct device *d,
1224                                           struct device_attribute *attr,
1225                                           const char *buf, size_t count)
1226 {
1227         int i;
1228         struct slave *slave;
1229         struct slave *old_active = NULL;
1230         struct slave *new_active = NULL;
1231         struct bonding *bond = to_bond(d);
1232
1233         if (!rtnl_trylock())
1234                 return restart_syscall();
1235         read_lock(&bond->lock);
1236         write_lock_bh(&bond->curr_slave_lock);
1237
1238         if (!USES_PRIMARY(bond->params.mode))
1239                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1240                         bond->dev->name, bond->dev->name, bond->params.mode);
1241         else {
1242                 bond_for_each_slave(bond, slave, i) {
1243                         if (strnicmp
1244                             (slave->dev->name, buf,
1245                              strlen(slave->dev->name)) == 0) {
1246                                 old_active = bond->curr_active_slave;
1247                                 new_active = slave;
1248                                 if (new_active == old_active) {
1249                                         /* do nothing */
1250                                         pr_info("%s: %s is already the current active slave.\n",
1251                                                 bond->dev->name,
1252                                                 slave->dev->name);
1253                                         goto out;
1254                                 }
1255                                 else {
1256                                         if ((new_active) &&
1257                                             (old_active) &&
1258                                             (new_active->link == BOND_LINK_UP) &&
1259                                             IS_UP(new_active->dev)) {
1260                                                 pr_info("%s: Setting %s as active slave.\n",
1261                                                         bond->dev->name,
1262                                                         slave->dev->name);
1263                                                         bond_change_active_slave(bond, new_active);
1264                                         }
1265                                         else {
1266                                                 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1267                                                         bond->dev->name,
1268                                                         slave->dev->name,
1269                                                         slave->dev->name);
1270                                         }
1271                                         goto out;
1272                                 }
1273                         }
1274                 }
1275
1276                 /* if we got here, then we didn't match the name of any slave */
1277
1278                 if (strlen(buf) == 0 || buf[0] == '\n') {
1279                         pr_info("%s: Setting active slave to None.\n",
1280                                 bond->dev->name);
1281                         bond->primary_slave = NULL;
1282                         bond_select_active_slave(bond);
1283                 } else {
1284                         pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1285                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1286                 }
1287         }
1288  out:
1289         write_unlock_bh(&bond->curr_slave_lock);
1290         read_unlock(&bond->lock);
1291         rtnl_unlock();
1292
1293         return count;
1294
1295 }
1296 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1297                    bonding_show_active_slave, bonding_store_active_slave);
1298
1299
1300 /*
1301  * Show link status of the bond interface.
1302  */
1303 static ssize_t bonding_show_mii_status(struct device *d,
1304                                        struct device_attribute *attr,
1305                                        char *buf)
1306 {
1307         struct slave *curr;
1308         struct bonding *bond = to_bond(d);
1309
1310         read_lock(&bond->curr_slave_lock);
1311         curr = bond->curr_active_slave;
1312         read_unlock(&bond->curr_slave_lock);
1313
1314         return sprintf(buf, "%s\n", curr ? "up" : "down");
1315 }
1316 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1317
1318
1319 /*
1320  * Show current 802.3ad aggregator ID.
1321  */
1322 static ssize_t bonding_show_ad_aggregator(struct device *d,
1323                                           struct device_attribute *attr,
1324                                           char *buf)
1325 {
1326         int count = 0;
1327         struct bonding *bond = to_bond(d);
1328
1329         if (bond->params.mode == BOND_MODE_8023AD) {
1330                 struct ad_info ad_info;
1331                 count = sprintf(buf, "%d\n",
1332                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1333                                 ?  0 : ad_info.aggregator_id);
1334         }
1335
1336         return count;
1337 }
1338 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1339
1340
1341 /*
1342  * Show number of active 802.3ad ports.
1343  */
1344 static ssize_t bonding_show_ad_num_ports(struct device *d,
1345                                          struct device_attribute *attr,
1346                                          char *buf)
1347 {
1348         int count = 0;
1349         struct bonding *bond = to_bond(d);
1350
1351         if (bond->params.mode == BOND_MODE_8023AD) {
1352                 struct ad_info ad_info;
1353                 count = sprintf(buf, "%d\n",
1354                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1355                                 ?  0 : ad_info.ports);
1356         }
1357
1358         return count;
1359 }
1360 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1361
1362
1363 /*
1364  * Show current 802.3ad actor key.
1365  */
1366 static ssize_t bonding_show_ad_actor_key(struct device *d,
1367                                          struct device_attribute *attr,
1368                                          char *buf)
1369 {
1370         int count = 0;
1371         struct bonding *bond = to_bond(d);
1372
1373         if (bond->params.mode == BOND_MODE_8023AD) {
1374                 struct ad_info ad_info;
1375                 count = sprintf(buf, "%d\n",
1376                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1377                                 ?  0 : ad_info.actor_key);
1378         }
1379
1380         return count;
1381 }
1382 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1383
1384
1385 /*
1386  * Show current 802.3ad partner key.
1387  */
1388 static ssize_t bonding_show_ad_partner_key(struct device *d,
1389                                            struct device_attribute *attr,
1390                                            char *buf)
1391 {
1392         int count = 0;
1393         struct bonding *bond = to_bond(d);
1394
1395         if (bond->params.mode == BOND_MODE_8023AD) {
1396                 struct ad_info ad_info;
1397                 count = sprintf(buf, "%d\n",
1398                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1399                                 ?  0 : ad_info.partner_key);
1400         }
1401
1402         return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1405
1406
1407 /*
1408  * Show current 802.3ad partner mac.
1409  */
1410 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1411                                            struct device_attribute *attr,
1412                                            char *buf)
1413 {
1414         int count = 0;
1415         struct bonding *bond = to_bond(d);
1416
1417         if (bond->params.mode == BOND_MODE_8023AD) {
1418                 struct ad_info ad_info;
1419                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1420                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1421         }
1422
1423         return count;
1424 }
1425 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1426
1427 /*
1428  * Show the queue_ids of the slaves in the current bond.
1429  */
1430 static ssize_t bonding_show_queue_id(struct device *d,
1431                                      struct device_attribute *attr,
1432                                      char *buf)
1433 {
1434         struct slave *slave;
1435         int i, res = 0;
1436         struct bonding *bond = to_bond(d);
1437
1438         if (!rtnl_trylock())
1439                 return restart_syscall();
1440
1441         read_lock(&bond->lock);
1442         bond_for_each_slave(bond, slave, i) {
1443                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1444                         /* not enough space for another interface_name:queue_id pair */
1445                         if ((PAGE_SIZE - res) > 10)
1446                                 res = PAGE_SIZE - 10;
1447                         res += sprintf(buf + res, "++more++ ");
1448                         break;
1449                 }
1450                 res += sprintf(buf + res, "%s:%d ",
1451                                slave->dev->name, slave->queue_id);
1452         }
1453         read_unlock(&bond->lock);
1454         if (res)
1455                 buf[res-1] = '\n'; /* eat the leftover space */
1456         rtnl_unlock();
1457         return res;
1458 }
1459
1460 /*
1461  * Set the queue_ids of the  slaves in the current bond.  The bond
1462  * interface must be enslaved for this to work.
1463  */
1464 static ssize_t bonding_store_queue_id(struct device *d,
1465                                       struct device_attribute *attr,
1466                                       const char *buffer, size_t count)
1467 {
1468         struct slave *slave, *update_slave;
1469         struct bonding *bond = to_bond(d);
1470         u16 qid;
1471         int i, ret = count;
1472         char *delim;
1473         struct net_device *sdev = NULL;
1474
1475         if (!rtnl_trylock())
1476                 return restart_syscall();
1477
1478         /* delim will point to queue id if successful */
1479         delim = strchr(buffer, ':');
1480         if (!delim)
1481                 goto err_no_cmd;
1482
1483         /*
1484          * Terminate string that points to device name and bump it
1485          * up one, so we can read the queue id there.
1486          */
1487         *delim = '\0';
1488         if (sscanf(++delim, "%hd\n", &qid) != 1)
1489                 goto err_no_cmd;
1490
1491         /* Check buffer length, valid ifname and queue id */
1492         if (strlen(buffer) > IFNAMSIZ ||
1493             !dev_valid_name(buffer) ||
1494             qid > bond->params.tx_queues)
1495                 goto err_no_cmd;
1496
1497         /* Get the pointer to that interface if it exists */
1498         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1499         if (!sdev)
1500                 goto err_no_cmd;
1501
1502         read_lock(&bond->lock);
1503
1504         /* Search for thes slave and check for duplicate qids */
1505         update_slave = NULL;
1506         bond_for_each_slave(bond, slave, i) {
1507                 if (sdev == slave->dev)
1508                         /*
1509                          * We don't need to check the matching
1510                          * slave for dups, since we're overwriting it
1511                          */
1512                         update_slave = slave;
1513                 else if (qid && qid == slave->queue_id) {
1514                         goto err_no_cmd_unlock;
1515                 }
1516         }
1517
1518         if (!update_slave)
1519                 goto err_no_cmd_unlock;
1520
1521         /* Actually set the qids for the slave */
1522         update_slave->queue_id = qid;
1523
1524         read_unlock(&bond->lock);
1525 out:
1526         rtnl_unlock();
1527         return ret;
1528
1529 err_no_cmd_unlock:
1530         read_unlock(&bond->lock);
1531 err_no_cmd:
1532         pr_info("invalid input for queue_id set for %s.\n",
1533                 bond->dev->name);
1534         ret = -EPERM;
1535         goto out;
1536 }
1537
1538 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1539                    bonding_store_queue_id);
1540
1541
1542 /*
1543  * Show and set the all_slaves_active flag.
1544  */
1545 static ssize_t bonding_show_slaves_active(struct device *d,
1546                                           struct device_attribute *attr,
1547                                           char *buf)
1548 {
1549         struct bonding *bond = to_bond(d);
1550
1551         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1552 }
1553
1554 static ssize_t bonding_store_slaves_active(struct device *d,
1555                                            struct device_attribute *attr,
1556                                            const char *buf, size_t count)
1557 {
1558         int i, new_value, ret = count;
1559         struct bonding *bond = to_bond(d);
1560         struct slave *slave;
1561
1562         if (sscanf(buf, "%d", &new_value) != 1) {
1563                 pr_err("%s: no all_slaves_active value specified.\n",
1564                        bond->dev->name);
1565                 ret = -EINVAL;
1566                 goto out;
1567         }
1568
1569         if (new_value == bond->params.all_slaves_active)
1570                 goto out;
1571
1572         if ((new_value == 0) || (new_value == 1)) {
1573                 bond->params.all_slaves_active = new_value;
1574         } else {
1575                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1576                         bond->dev->name, new_value);
1577                 ret = -EINVAL;
1578                 goto out;
1579         }
1580
1581         bond_for_each_slave(bond, slave, i) {
1582                 if (slave->state == BOND_STATE_BACKUP) {
1583                         if (new_value)
1584                                 slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
1585                         else
1586                                 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
1587                 }
1588         }
1589 out:
1590         return count;
1591 }
1592 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1593                    bonding_show_slaves_active, bonding_store_slaves_active);
1594
1595 static struct attribute *per_bond_attrs[] = {
1596         &dev_attr_slaves.attr,
1597         &dev_attr_mode.attr,
1598         &dev_attr_fail_over_mac.attr,
1599         &dev_attr_arp_validate.attr,
1600         &dev_attr_arp_interval.attr,
1601         &dev_attr_arp_ip_target.attr,
1602         &dev_attr_downdelay.attr,
1603         &dev_attr_updelay.attr,
1604         &dev_attr_lacp_rate.attr,
1605         &dev_attr_ad_select.attr,
1606         &dev_attr_xmit_hash_policy.attr,
1607         &dev_attr_num_grat_arp.attr,
1608         &dev_attr_num_unsol_na.attr,
1609         &dev_attr_miimon.attr,
1610         &dev_attr_primary.attr,
1611         &dev_attr_primary_reselect.attr,
1612         &dev_attr_use_carrier.attr,
1613         &dev_attr_active_slave.attr,
1614         &dev_attr_mii_status.attr,
1615         &dev_attr_ad_aggregator.attr,
1616         &dev_attr_ad_num_ports.attr,
1617         &dev_attr_ad_actor_key.attr,
1618         &dev_attr_ad_partner_key.attr,
1619         &dev_attr_ad_partner_mac.attr,
1620         &dev_attr_queue_id.attr,
1621         &dev_attr_all_slaves_active.attr,
1622         NULL,
1623 };
1624
1625 static struct attribute_group bonding_group = {
1626         .name = "bonding",
1627         .attrs = per_bond_attrs,
1628 };
1629
1630 /*
1631  * Initialize sysfs.  This sets up the bonding_masters file in
1632  * /sys/class/net.
1633  */
1634 int bond_create_sysfs(void)
1635 {
1636         int ret;
1637
1638         ret = netdev_class_create_file(&class_attr_bonding_masters);
1639         /*
1640          * Permit multiple loads of the module by ignoring failures to
1641          * create the bonding_masters sysfs file.  Bonding devices
1642          * created by second or subsequent loads of the module will
1643          * not be listed in, or controllable by, bonding_masters, but
1644          * will have the usual "bonding" sysfs directory.
1645          *
1646          * This is done to preserve backwards compatibility for
1647          * initscripts/sysconfig, which load bonding multiple times to
1648          * configure multiple bonding devices.
1649          */
1650         if (ret == -EEXIST) {
1651                 /* Is someone being kinky and naming a device bonding_master? */
1652                 if (__dev_get_by_name(&init_net,
1653                                       class_attr_bonding_masters.attr.name))
1654                         pr_err("network device named %s already exists in sysfs",
1655                                class_attr_bonding_masters.attr.name);
1656                 ret = 0;
1657         }
1658
1659         return ret;
1660
1661 }
1662
1663 /*
1664  * Remove /sys/class/net/bonding_masters.
1665  */
1666 void bond_destroy_sysfs(void)
1667 {
1668         netdev_class_remove_file(&class_attr_bonding_masters);
1669 }
1670
1671 /*
1672  * Initialize sysfs for each bond.  This sets up and registers
1673  * the 'bondctl' directory for each individual bond under /sys/class/net.
1674  */
1675 void bond_prepare_sysfs_group(struct bonding *bond)
1676 {
1677         bond->dev->sysfs_groups[0] = &bonding_group;
1678 }
1679