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                         if (rv == -EEXIST)
 122                                 pr_info("%s already exists.\n", ifname);
 123                         else
 124                                 pr_info("%s creation failed.\n", ifname);
 125                         res = rv;
 126                 }
 127         } else if (command[0] == '-') {
 128                 struct net_device *bond_dev;
 129
 130                 rtnl_lock();
 131                 bond_dev = bond_get_by_name(net, ifname);
 132                 if (bond_dev) {
 133                         pr_info("%s is being deleted...\n", ifname);
 134                         unregister_netdevice(bond_dev);
 135                 } else {
 136                         pr_err("unable to delete non-existent %s\n", ifname);
 137                         res = -ENODEV;
 138                 }
 139                 rtnl_unlock();
 140         } else
 141                 goto err_no_cmd;
 142
 143         /* Always return either count or an error.  If you return 0, you'll
 144          * get called forever, which is bad.
 145          */
 146         return res;
 147
 148 err_no_cmd:
 149         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 150         return -EPERM;
 151 }
 152
 153 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 154 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 155                   bonding_show_bonds, bonding_store_bonds);
 156
 157 int bond_create_slave_symlinks(struct net_device *master,
 158                                struct net_device *slave)
 159 {
 160         char linkname[IFNAMSIZ+7];
 161         int ret = 0;
 162
 163         /* first, create a link from the slave back to the master */
 164         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 165                                 "master");
 166         if (ret)
 167                 return ret;
 168         /* next, create a link from the master to the slave */
 169         sprintf(linkname, "slave_%s", slave->name);
 170         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 171                                 linkname);
 172         return ret;
 173
 174 }
 175
 176 void bond_destroy_slave_symlinks(struct net_device *master,
 177                                  struct net_device *slave)
 178 {
 179         char linkname[IFNAMSIZ+7];
 180
 181         sysfs_remove_link(&(slave->dev.kobj), "master");
 182         sprintf(linkname, "slave_%s", slave->name);
 183         sysfs_remove_link(&(master->dev.kobj), linkname);
 184 }
 185
 186
 187 /*
 188  * Show the slaves in the current bond.
 189  */
 190 static ssize_t bonding_show_slaves(struct device *d,
 191                                    struct device_attribute *attr, char *buf)
 192 {
 193         struct slave *slave;
 194         int i, res = 0;
 195         struct bonding *bond = to_bond(d);
 196
 197         read_lock(&bond->lock);
 198         bond_for_each_slave(bond, slave, i) {
 199                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 200                         /* not enough space for another interface name */
 201                         if ((PAGE_SIZE - res) > 10)
 202                                 res = PAGE_SIZE - 10;
 203                         res += sprintf(buf + res, "++more++ ");
 204                         break;
 205                 }
 206                 res += sprintf(buf + res, "%s ", slave->dev->name);
 207         }
 208         read_unlock(&bond->lock);
 209         if (res)
 210                 buf[res-1] = '\n'; /* eat the leftover space */
 211         return res;
 212 }
 213
 214 /*
 215  * Set the slaves in the current bond.  The bond interface must be
 216  * up for this to succeed.
 217  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 218  * All hard work should be done there.
 219  */
 220 static ssize_t bonding_store_slaves(struct device *d,
 221                                     struct device_attribute *attr,
 222                                     const char *buffer, size_t count)
 223 {
 224         char command[IFNAMSIZ + 1] = { 0, };
 225         char *ifname;
 226         int res, ret = count;
 227         struct net_device *dev;
 228         struct bonding *bond = to_bond(d);
 229
 230         /* Quick sanity check -- is the bond interface up? */
 231         if (!(bond->dev->flags & IFF_UP)) {
 232                 pr_warning("%s: doing slave updates when interface is down.\n",
 233                            bond->dev->name);
 234         }
 235
 236         if (!rtnl_trylock())
 237                 return restart_syscall();
 238
 239         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 240         ifname = command + 1;
 241         if ((strlen(command) <= 1) ||
 242             !dev_valid_name(ifname))
 243                 goto err_no_cmd;
 244
 245         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 246         if (!dev) {
 247                 pr_info("%s: Interface %s does not exist!\n",
 248                         bond->dev->name, ifname);
 249                 ret = -ENODEV;
 250                 goto out;
 251         }
 252
 253         switch (command[0]) {
 254         case '+':
 255                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 256                 res = bond_enslave(bond->dev, dev);
 257                 break;
 258
 259         case '-':
 260                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 261                 res = bond_release(bond->dev, dev);
 262                 break;
 263
 264         default:
 265                 goto err_no_cmd;
 266         }
 267
 268         if (res)
 269                 ret = res;
 270         goto out;
 271
 272 err_no_cmd:
 273         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 274                bond->dev->name);
 275         ret = -EPERM;
 276
 277 out:
 278         rtnl_unlock();
 279         return ret;
 280 }
 281
 282 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 283                    bonding_store_slaves);
 284
 285 /*
 286  * Show and set the bonding mode.  The bond interface must be down to
 287  * change the mode.
 288  */
 289 static ssize_t bonding_show_mode(struct device *d,
 290                                  struct device_attribute *attr, char *buf)
 291 {
 292         struct bonding *bond = to_bond(d);
 293
 294         return sprintf(buf, "%s %d\n",
 295                         bond_mode_tbl[bond->params.mode].modename,
 296                         bond->params.mode);
 297 }
 298
 299 static ssize_t bonding_store_mode(struct device *d,
 300                                   struct device_attribute *attr,
 301                                   const char *buf, size_t count)
 302 {
 303         int new_value, ret = count;
 304         struct bonding *bond = to_bond(d);
 305
 306         if (bond->dev->flags & IFF_UP) {
 307                 pr_err("unable to update mode of %s because interface is up.\n",
 308                        bond->dev->name);
 309                 ret = -EPERM;
 310                 goto out;
 311         }
 312
 313         new_value = bond_parse_parm(buf, bond_mode_tbl);
 314         if (new_value < 0)  {
 315                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 316                        bond->dev->name, (int)strlen(buf) - 1, buf);
 317                 ret = -EINVAL;
 318                 goto out;
 319         }
 320         if ((new_value == BOND_MODE_ALB ||
 321              new_value == BOND_MODE_TLB) &&
 322             bond->params.arp_interval) {
 323                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 324                        bond->dev->name, bond_mode_tbl[new_value].modename);
 325                 ret = -EINVAL;
 326                 goto out;
 327         }
 328
 329         bond->params.mode = new_value;
 330         bond_set_mode_ops(bond, bond->params.mode);
 331         pr_info("%s: setting mode to %s (%d).\n",
 332                 bond->dev->name, bond_mode_tbl[new_value].modename,
 333                 new_value);
 334 out:
 335         return ret;
 336 }
 337 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 338                    bonding_show_mode, bonding_store_mode);
 339
 340 /*
 341  * Show and set the bonding transmit hash method.
 342  * The bond interface must be down to change the xmit hash policy.
 343  */
 344 static ssize_t bonding_show_xmit_hash(struct device *d,
 345                                       struct device_attribute *attr,
 346                                       char *buf)
 347 {
 348         struct bonding *bond = to_bond(d);
 349
 350         return sprintf(buf, "%s %d\n",
 351                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 352                        bond->params.xmit_policy);
 353 }
 354
 355 static ssize_t bonding_store_xmit_hash(struct device *d,
 356                                        struct device_attribute *attr,
 357                                        const char *buf, size_t count)
 358 {
 359         int new_value, ret = count;
 360         struct bonding *bond = to_bond(d);
 361
 362         if (bond->dev->flags & IFF_UP) {
 363                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 364                        bond->dev->name);
 365                 ret = -EPERM;
 366                 goto out;
 367         }
 368
 369         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 370         if (new_value < 0)  {
 371                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 372                        bond->dev->name,
 373                        (int)strlen(buf) - 1, buf);
 374                 ret = -EINVAL;
 375                 goto out;
 376         } else {
 377                 bond->params.xmit_policy = new_value;
 378                 bond_set_mode_ops(bond, bond->params.mode);
 379                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 380                         bond->dev->name,
 381                         xmit_hashtype_tbl[new_value].modename, new_value);
 382         }
 383 out:
 384         return ret;
 385 }
 386 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 387                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 388
 389 /*
 390  * Show and set arp_validate.
 391  */
 392 static ssize_t bonding_show_arp_validate(struct device *d,
 393                                          struct device_attribute *attr,
 394                                          char *buf)
 395 {
 396         struct bonding *bond = to_bond(d);
 397
 398         return sprintf(buf, "%s %d\n",
 399                        arp_validate_tbl[bond->params.arp_validate].modename,
 400                        bond->params.arp_validate);
 401 }
 402
 403 static ssize_t bonding_store_arp_validate(struct device *d,
 404                                           struct device_attribute *attr,
 405                                           const char *buf, size_t count)
 406 {
 407         int new_value;
 408         struct bonding *bond = to_bond(d);
 409
 410         new_value = bond_parse_parm(buf, arp_validate_tbl);
 411         if (new_value < 0) {
 412                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 413                        bond->dev->name, buf);
 414                 return -EINVAL;
 415         }
 416         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 417                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 418                        bond->dev->name);
 419                 return -EINVAL;
 420         }
 421         pr_info("%s: setting arp_validate to %s (%d).\n",
 422                 bond->dev->name, arp_validate_tbl[new_value].modename,
 423                 new_value);
 424
 425         if (!bond->params.arp_validate && new_value)
 426                 bond_register_arp(bond);
 427         else if (bond->params.arp_validate && !new_value)
 428                 bond_unregister_arp(bond);
 429
 430         bond->params.arp_validate = new_value;
 431
 432         return count;
 433 }
 434
 435 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 436                    bonding_store_arp_validate);
 437
 438 /*
 439  * Show and store fail_over_mac.  User only allowed to change the
 440  * value when there are no slaves.
 441  */
 442 static ssize_t bonding_show_fail_over_mac(struct device *d,
 443                                           struct device_attribute *attr,
 444                                           char *buf)
 445 {
 446         struct bonding *bond = to_bond(d);
 447
 448         return sprintf(buf, "%s %d\n",
 449                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 450                        bond->params.fail_over_mac);
 451 }
 452
 453 static ssize_t bonding_store_fail_over_mac(struct device *d,
 454                                            struct device_attribute *attr,
 455                                            const char *buf, size_t count)
 456 {
 457         int new_value;
 458         struct bonding *bond = to_bond(d);
 459
 460         if (bond->slave_cnt != 0) {
 461                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 462                        bond->dev->name);
 463                 return -EPERM;
 464         }
 465
 466         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 467         if (new_value < 0) {
 468                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 469                        bond->dev->name, buf);
 470                 return -EINVAL;
 471         }
 472
 473         bond->params.fail_over_mac = new_value;
 474         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 475                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 476                 new_value);
 477
 478         return count;
 479 }
 480
 481 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 482                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 483
 484 /*
 485  * Show and set the arp timer interval.  There are two tricky bits
 486  * here.  First, if ARP monitoring is activated, then we must disable
 487  * MII monitoring.  Second, if the ARP timer isn't running, we must
 488  * start it.
 489  */
 490 static ssize_t bonding_show_arp_interval(struct device *d,
 491                                          struct device_attribute *attr,
 492                                          char *buf)
 493 {
 494         struct bonding *bond = to_bond(d);
 495
 496         return sprintf(buf, "%d\n", bond->params.arp_interval);
 497 }
 498
 499 static ssize_t bonding_store_arp_interval(struct device *d,
 500                                           struct device_attribute *attr,
 501                                           const char *buf, size_t count)
 502 {
 503         int new_value, ret = count;
 504         struct bonding *bond = to_bond(d);
 505
 506         if (sscanf(buf, "%d", &new_value) != 1) {
 507                 pr_err("%s: no arp_interval value specified.\n",
 508                        bond->dev->name);
 509                 ret = -EINVAL;
 510                 goto out;
 511         }
 512         if (new_value < 0) {
 513                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 514                        bond->dev->name, new_value, INT_MAX);
 515                 ret = -EINVAL;
 516                 goto out;
 517         }
 518         if (bond->params.mode == BOND_MODE_ALB ||
 519             bond->params.mode == BOND_MODE_TLB) {
 520                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 521                         bond->dev->name, bond->dev->name);
 522                 ret = -EINVAL;
 523                 goto out;
 524         }
 525         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 526                 bond->dev->name, new_value);
 527         bond->params.arp_interval = new_value;
 528         if (bond->params.miimon) {
 529                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 530                         bond->dev->name, bond->dev->name);
 531                 bond->params.miimon = 0;
 532                 if (delayed_work_pending(&bond->mii_work)) {
 533                         cancel_delayed_work(&bond->mii_work);
 534                         flush_workqueue(bond->wq);
 535                 }
 536         }
 537         if (!bond->params.arp_targets[0]) {
 538                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 539                         bond->dev->name);
 540         }
 541         if (bond->dev->flags & IFF_UP) {
 542                 /* If the interface is up, we may need to fire off
 543                  * the ARP timer.  If the interface is down, the
 544                  * timer will get fired off when the open function
 545                  * is called.
 546                  */
 547                 if (!delayed_work_pending(&bond->arp_work)) {
 548                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 549                                 INIT_DELAYED_WORK(&bond->arp_work,
 550                                                   bond_activebackup_arp_mon);
 551                         else
 552                                 INIT_DELAYED_WORK(&bond->arp_work,
 553                                                   bond_loadbalance_arp_mon);
 554
 555                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 556                 }
 557         }
 558
 559 out:
 560         return ret;
 561 }
 562 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 563                    bonding_show_arp_interval, bonding_store_arp_interval);
 564
 565 /*
 566  * Show and set the arp targets.
 567  */
 568 static ssize_t bonding_show_arp_targets(struct device *d,
 569                                         struct device_attribute *attr,
 570                                         char *buf)
 571 {
 572         int i, res = 0;
 573         struct bonding *bond = to_bond(d);
 574
 575         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 576                 if (bond->params.arp_targets[i])
 577                         res += sprintf(buf + res, "%pI4 ",
 578                                        &bond->params.arp_targets[i]);
 579         }
 580         if (res)
 581                 buf[res-1] = '\n'; /* eat the leftover space */
 582         return res;
 583 }
 584
 585 static ssize_t bonding_store_arp_targets(struct device *d,
 586                                          struct device_attribute *attr,
 587                                          const char *buf, size_t count)
 588 {
 589         __be32 newtarget;
 590         int i = 0, done = 0, ret = count;
 591         struct bonding *bond = to_bond(d);
 592         __be32 *targets;
 593
 594         targets = bond->params.arp_targets;
 595         newtarget = in_aton(buf + 1);
 596         /* look for adds */
 597         if (buf[0] == '+') {
 598                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 599                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 600                                bond->dev->name, &newtarget);
 601                         ret = -EINVAL;
 602                         goto out;
 603                 }
 604                 /* look for an empty slot to put the target in, and check for dupes */
 605                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 606                         if (targets[i] == newtarget) { /* duplicate */
 607                                 pr_err("%s: ARP target %pI4 is already present\n",
 608                                        bond->dev->name, &newtarget);
 609                                 ret = -EINVAL;
 610                                 goto out;
 611                         }
 612                         if (targets[i] == 0) {
 613                                 pr_info("%s: adding ARP target %pI4.\n",
 614                                         bond->dev->name, &newtarget);
 615                                 done = 1;
 616                                 targets[i] = newtarget;
 617                         }
 618                 }
 619                 if (!done) {
 620                         pr_err("%s: ARP target table is full!\n",
 621                                bond->dev->name);
 622                         ret = -EINVAL;
 623                         goto out;
 624                 }
 625
 626         } else if (buf[0] == '-')       {
 627                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 628                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 629                                bond->dev->name, &newtarget);
 630                         ret = -EINVAL;
 631                         goto out;
 632                 }
 633
 634                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 635                         if (targets[i] == newtarget) {
 636                                 int j;
 637                                 pr_info("%s: removing ARP target %pI4.\n",
 638                                         bond->dev->name, &newtarget);
 639                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 640                                         targets[j] = targets[j+1];
 641
 642                                 targets[j] = 0;
 643                                 done = 1;
 644                         }
 645                 }
 646                 if (!done) {
 647                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 648                                 bond->dev->name, &newtarget);
 649                         ret = -EINVAL;
 650                         goto out;
 651                 }
 652         } else {
 653                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 654                        bond->dev->name);
 655                 ret = -EPERM;
 656                 goto out;
 657         }
 658
 659 out:
 660         return ret;
 661 }
 662 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 663
 664 /*
 665  * Show and set the up and down delays.  These must be multiples of the
 666  * MII monitoring value, and are stored internally as the multiplier.
 667  * Thus, we must translate to MS for the real world.
 668  */
 669 static ssize_t bonding_show_downdelay(struct device *d,
 670                                       struct device_attribute *attr,
 671                                       char *buf)
 672 {
 673         struct bonding *bond = to_bond(d);
 674
 675         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 676 }
 677
 678 static ssize_t bonding_store_downdelay(struct device *d,
 679                                        struct device_attribute *attr,
 680                                        const char *buf, size_t count)
 681 {
 682         int new_value, ret = count;
 683         struct bonding *bond = to_bond(d);
 684
 685         if (!(bond->params.miimon)) {
 686                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 687                        bond->dev->name);
 688                 ret = -EPERM;
 689                 goto out;
 690         }
 691
 692         if (sscanf(buf, "%d", &new_value) != 1) {
 693                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 694                 ret = -EINVAL;
 695                 goto out;
 696         }
 697         if (new_value < 0) {
 698                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 699                        bond->dev->name, new_value, 1, INT_MAX);
 700                 ret = -EINVAL;
 701                 goto out;
 702         } else {
 703                 if ((new_value % bond->params.miimon) != 0) {
 704                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 705                                    bond->dev->name, new_value,
 706                                    bond->params.miimon,
 707                                    (new_value / bond->params.miimon) *
 708                                    bond->params.miimon);
 709                 }
 710                 bond->params.downdelay = new_value / bond->params.miimon;
 711                 pr_info("%s: Setting down delay to %d.\n",
 712                         bond->dev->name,
 713                         bond->params.downdelay * bond->params.miimon);
 714
 715         }
 716
 717 out:
 718         return ret;
 719 }
 720 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 721                    bonding_show_downdelay, bonding_store_downdelay);
 722
 723 static ssize_t bonding_show_updelay(struct device *d,
 724                                     struct device_attribute *attr,
 725                                     char *buf)
 726 {
 727         struct bonding *bond = to_bond(d);
 728
 729         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 730
 731 }
 732
 733 static ssize_t bonding_store_updelay(struct device *d,
 734                                      struct device_attribute *attr,
 735                                      const char *buf, size_t count)
 736 {
 737         int new_value, ret = count;
 738         struct bonding *bond = to_bond(d);
 739
 740         if (!(bond->params.miimon)) {
 741                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 742                        bond->dev->name);
 743                 ret = -EPERM;
 744                 goto out;
 745         }
 746
 747         if (sscanf(buf, "%d", &new_value) != 1) {
 748                 pr_err("%s: no up delay value specified.\n",
 749                        bond->dev->name);
 750                 ret = -EINVAL;
 751                 goto out;
 752         }
 753         if (new_value < 0) {
 754                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 755                        bond->dev->name, new_value, 1, INT_MAX);
 756                 ret = -EINVAL;
 757                 goto out;
 758         } else {
 759                 if ((new_value % bond->params.miimon) != 0) {
 760                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 761                                    bond->dev->name, new_value,
 762                                    bond->params.miimon,
 763                                    (new_value / bond->params.miimon) *
 764                                    bond->params.miimon);
 765                 }
 766                 bond->params.updelay = new_value / bond->params.miimon;
 767                 pr_info("%s: Setting up delay to %d.\n",
 768                         bond->dev->name,
 769                         bond->params.updelay * bond->params.miimon);
 770         }
 771
 772 out:
 773         return ret;
 774 }
 775 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 776                    bonding_show_updelay, bonding_store_updelay);
 777
 778 /*
 779  * Show and set the LACP interval.  Interface must be down, and the mode
 780  * must be set to 802.3ad mode.
 781  */
 782 static ssize_t bonding_show_lacp(struct device *d,
 783                                  struct device_attribute *attr,
 784                                  char *buf)
 785 {
 786         struct bonding *bond = to_bond(d);
 787
 788         return sprintf(buf, "%s %d\n",
 789                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 790                 bond->params.lacp_fast);
 791 }
 792
 793 static ssize_t bonding_store_lacp(struct device *d,
 794                                   struct device_attribute *attr,
 795                                   const char *buf, size_t count)
 796 {
 797         int new_value, ret = count;
 798         struct bonding *bond = to_bond(d);
 799
 800         if (bond->dev->flags & IFF_UP) {
 801                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 802                        bond->dev->name);
 803                 ret = -EPERM;
 804                 goto out;
 805         }
 806
 807         if (bond->params.mode != BOND_MODE_8023AD) {
 808                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 809                        bond->dev->name);
 810                 ret = -EPERM;
 811                 goto out;
 812         }
 813
 814         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 815
 816         if ((new_value == 1) || (new_value == 0)) {
 817                 bond->params.lacp_fast = new_value;
 818                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 819                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 820                         new_value);
 821         } else {
 822                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 823                        bond->dev->name, (int)strlen(buf) - 1, buf);
 824                 ret = -EINVAL;
 825         }
 826 out:
 827         return ret;
 828 }
 829 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 830                    bonding_show_lacp, bonding_store_lacp);
 831
 832 static ssize_t bonding_show_ad_select(struct device *d,
 833                                       struct device_attribute *attr,
 834                                       char *buf)
 835 {
 836         struct bonding *bond = to_bond(d);
 837
 838         return sprintf(buf, "%s %d\n",
 839                 ad_select_tbl[bond->params.ad_select].modename,
 840                 bond->params.ad_select);
 841 }
 842
 843
 844 static ssize_t bonding_store_ad_select(struct device *d,
 845                                        struct device_attribute *attr,
 846                                        const char *buf, size_t count)
 847 {
 848         int new_value, ret = count;
 849         struct bonding *bond = to_bond(d);
 850
 851         if (bond->dev->flags & IFF_UP) {
 852                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 853                        bond->dev->name);
 854                 ret = -EPERM;
 855                 goto out;
 856         }
 857
 858         new_value = bond_parse_parm(buf, ad_select_tbl);
 859
 860         if (new_value != -1) {
 861                 bond->params.ad_select = new_value;
 862                 pr_info("%s: Setting ad_select to %s (%d).\n",
 863                         bond->dev->name, ad_select_tbl[new_value].modename,
 864                         new_value);
 865         } else {
 866                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 867                        bond->dev->name, (int)strlen(buf) - 1, buf);
 868                 ret = -EINVAL;
 869         }
 870 out:
 871         return ret;
 872 }
 873 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 874                    bonding_show_ad_select, bonding_store_ad_select);
 875
 876 /*
 877  * Show and set the MII monitor interval.  There are two tricky bits
 878  * here.  First, if MII monitoring is activated, then we must disable
 879  * ARP monitoring.  Second, if the timer isn't running, we must
 880  * start it.
 881  */
 882 static ssize_t bonding_show_miimon(struct device *d,
 883                                    struct device_attribute *attr,
 884                                    char *buf)
 885 {
 886         struct bonding *bond = to_bond(d);
 887
 888         return sprintf(buf, "%d\n", bond->params.miimon);
 889 }
 890
 891 static ssize_t bonding_store_miimon(struct device *d,
 892                                     struct device_attribute *attr,
 893                                     const char *buf, size_t count)
 894 {
 895         int new_value, ret = count;
 896         struct bonding *bond = to_bond(d);
 897
 898         if (sscanf(buf, "%d", &new_value) != 1) {
 899                 pr_err("%s: no miimon value specified.\n",
 900                        bond->dev->name);
 901                 ret = -EINVAL;
 902                 goto out;
 903         }
 904         if (new_value < 0) {
 905                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 906                        bond->dev->name, new_value, 1, INT_MAX);
 907                 ret = -EINVAL;
 908                 goto out;
 909         } else {
 910                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 911                         bond->dev->name, new_value);
 912                 bond->params.miimon = new_value;
 913                 if (bond->params.updelay)
 914                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 915                                 bond->dev->name,
 916                                 bond->params.updelay * bond->params.miimon);
 917                 if (bond->params.downdelay)
 918                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 919                                 bond->dev->name,
 920                                 bond->params.downdelay * bond->params.miimon);
 921                 if (bond->params.arp_interval) {
 922                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 923                                 bond->dev->name);
 924                         bond->params.arp_interval = 0;
 925                         if (bond->params.arp_validate) {
 926                                 bond_unregister_arp(bond);
 927                                 bond->params.arp_validate =
 928                                         BOND_ARP_VALIDATE_NONE;
 929                         }
 930                         if (delayed_work_pending(&bond->arp_work)) {
 931                                 cancel_delayed_work(&bond->arp_work);
 932                                 flush_workqueue(bond->wq);
 933                         }
 934                 }
 935
 936                 if (bond->dev->flags & IFF_UP) {
 937                         /* If the interface is up, we may need to fire off
 938                          * the MII timer. If the interface is down, the
 939                          * timer will get fired off when the open function
 940                          * is called.
 941                          */
 942                         if (!delayed_work_pending(&bond->mii_work)) {
 943                                 INIT_DELAYED_WORK(&bond->mii_work,
 944                                                   bond_mii_monitor);
 945                                 queue_delayed_work(bond->wq,
 946                                                    &bond->mii_work, 0);
 947                         }
 948                 }
 949         }
 950 out:
 951         return ret;
 952 }
 953 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 954                    bonding_show_miimon, bonding_store_miimon);
 955
 956 /*
 957  * Show and set the primary slave.  The store function is much
 958  * simpler than bonding_store_slaves function because it only needs to
 959  * handle one interface name.
 960  * The bond must be a mode that supports a primary for this be
 961  * set.
 962  */
 963 static ssize_t bonding_show_primary(struct device *d,
 964                                     struct device_attribute *attr,
 965                                     char *buf)
 966 {
 967         int count = 0;
 968         struct bonding *bond = to_bond(d);
 969
 970         if (bond->primary_slave)
 971                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
 972
 973         return count;
 974 }
 975
 976 static ssize_t bonding_store_primary(struct device *d,
 977                                      struct device_attribute *attr,
 978                                      const char *buf, size_t count)
 979 {
 980         int i;
 981         struct slave *slave;
 982         struct bonding *bond = to_bond(d);
 983
 984         if (!rtnl_trylock())
 985                 return restart_syscall();
 986         block_netpoll_tx();
 987         read_lock(&bond->lock);
 988         write_lock_bh(&bond->curr_slave_lock);
 989
 990         if (!USES_PRIMARY(bond->params.mode)) {
 991                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
 992                         bond->dev->name, bond->dev->name, bond->params.mode);
 993         } else {
 994                 bond_for_each_slave(bond, slave, i) {
 995                         if (strnicmp
 996                             (slave->dev->name, buf,
 997                              strlen(slave->dev->name)) == 0) {
 998                                 pr_info("%s: Setting %s as primary slave.\n",
 999                                         bond->dev->name, slave->dev->name);
1000                                 bond->primary_slave = slave;
1001                                 strcpy(bond->params.primary, slave->dev->name);
1002                                 bond_select_active_slave(bond);
1003                                 goto out;
1004                         }
1005                 }
1006
1007                 /* if we got here, then we didn't match the name of any slave */
1008
1009                 if (strlen(buf) == 0 || buf[0] == '\n') {
1010                         pr_info("%s: Setting primary slave to None.\n",
1011                                 bond->dev->name);
1012                         bond->primary_slave = NULL;
1013                                 bond_select_active_slave(bond);
1014                 } else {
1015                         pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1016                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1017                 }
1018         }
1019 out:
1020         write_unlock_bh(&bond->curr_slave_lock);
1021         read_unlock(&bond->lock);
1022         unblock_netpoll_tx();
1023         rtnl_unlock();
1024
1025         return count;
1026 }
1027 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1028                    bonding_show_primary, bonding_store_primary);
1029
1030 /*
1031  * Show and set the primary_reselect flag.
1032  */
1033 static ssize_t bonding_show_primary_reselect(struct device *d,
1034                                              struct device_attribute *attr,
1035                                              char *buf)
1036 {
1037         struct bonding *bond = to_bond(d);
1038
1039         return sprintf(buf, "%s %d\n",
1040                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1041                        bond->params.primary_reselect);
1042 }
1043
1044 static ssize_t bonding_store_primary_reselect(struct device *d,
1045                                               struct device_attribute *attr,
1046                                               const char *buf, size_t count)
1047 {
1048         int new_value, ret = count;
1049         struct bonding *bond = to_bond(d);
1050
1051         if (!rtnl_trylock())
1052                 return restart_syscall();
1053
1054         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1055         if (new_value < 0)  {
1056                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1057                        bond->dev->name,
1058                        (int) strlen(buf) - 1, buf);
1059                 ret = -EINVAL;
1060                 goto out;
1061         }
1062
1063         bond->params.primary_reselect = new_value;
1064         pr_info("%s: setting primary_reselect to %s (%d).\n",
1065                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1066                 new_value);
1067
1068         block_netpoll_tx();
1069         read_lock(&bond->lock);
1070         write_lock_bh(&bond->curr_slave_lock);
1071         bond_select_active_slave(bond);
1072         write_unlock_bh(&bond->curr_slave_lock);
1073         read_unlock(&bond->lock);
1074         unblock_netpoll_tx();
1075 out:
1076         rtnl_unlock();
1077         return ret;
1078 }
1079 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1080                    bonding_show_primary_reselect,
1081                    bonding_store_primary_reselect);
1082
1083 /*
1084  * Show and set the use_carrier flag.
1085  */
1086 static ssize_t bonding_show_carrier(struct device *d,
1087                                     struct device_attribute *attr,
1088                                     char *buf)
1089 {
1090         struct bonding *bond = to_bond(d);
1091
1092         return sprintf(buf, "%d\n", bond->params.use_carrier);
1093 }
1094
1095 static ssize_t bonding_store_carrier(struct device *d,
1096                                      struct device_attribute *attr,
1097                                      const char *buf, size_t count)
1098 {
1099         int new_value, ret = count;
1100         struct bonding *bond = to_bond(d);
1101
1102
1103         if (sscanf(buf, "%d", &new_value) != 1) {
1104                 pr_err("%s: no use_carrier value specified.\n",
1105                        bond->dev->name);
1106                 ret = -EINVAL;
1107                 goto out;
1108         }
1109         if ((new_value == 0) || (new_value == 1)) {
1110                 bond->params.use_carrier = new_value;
1111                 pr_info("%s: Setting use_carrier to %d.\n",
1112                         bond->dev->name, new_value);
1113         } else {
1114                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1115                         bond->dev->name, new_value);
1116         }
1117 out:
1118         return ret;
1119 }
1120 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1121                    bonding_show_carrier, bonding_store_carrier);
1122
1123
1124 /*
1125  * Show and set currently active_slave.
1126  */
1127 static ssize_t bonding_show_active_slave(struct device *d,
1128                                          struct device_attribute *attr,
1129                                          char *buf)
1130 {
1131         struct slave *curr;
1132         struct bonding *bond = to_bond(d);
1133         int count = 0;
1134
1135         read_lock(&bond->curr_slave_lock);
1136         curr = bond->curr_active_slave;
1137         read_unlock(&bond->curr_slave_lock);
1138
1139         if (USES_PRIMARY(bond->params.mode) && curr)
1140                 count = sprintf(buf, "%s\n", curr->dev->name);
1141         return count;
1142 }
1143
1144 static ssize_t bonding_store_active_slave(struct device *d,
1145                                           struct device_attribute *attr,
1146                                           const char *buf, size_t count)
1147 {
1148         int i;
1149         struct slave *slave;
1150         struct slave *old_active = NULL;
1151         struct slave *new_active = NULL;
1152         struct bonding *bond = to_bond(d);
1153
1154         if (!rtnl_trylock())
1155                 return restart_syscall();
1156
1157         block_netpoll_tx();
1158         read_lock(&bond->lock);
1159         write_lock_bh(&bond->curr_slave_lock);
1160
1161         if (!USES_PRIMARY(bond->params.mode))
1162                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1163                         bond->dev->name, bond->dev->name, bond->params.mode);
1164         else {
1165                 bond_for_each_slave(bond, slave, i) {
1166                         if (strnicmp
1167                             (slave->dev->name, buf,
1168                              strlen(slave->dev->name)) == 0) {
1169                                 old_active = bond->curr_active_slave;
1170                                 new_active = slave;
1171                                 if (new_active == old_active) {
1172                                         /* do nothing */
1173                                         pr_info("%s: %s is already the current active slave.\n",
1174                                                 bond->dev->name,
1175                                                 slave->dev->name);
1176                                         goto out;
1177                                 }
1178                                 else {
1179                                         if ((new_active) &&
1180                                             (old_active) &&
1181                                             (new_active->link == BOND_LINK_UP) &&
1182                                             IS_UP(new_active->dev)) {
1183                                                 pr_info("%s: Setting %s as active slave.\n",
1184                                                         bond->dev->name,
1185                                                         slave->dev->name);
1186                                                         bond_change_active_slave(bond, new_active);
1187                                         }
1188                                         else {
1189                                                 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1190                                                         bond->dev->name,
1191                                                         slave->dev->name,
1192                                                         slave->dev->name);
1193                                         }
1194                                         goto out;
1195                                 }
1196                         }
1197                 }
1198
1199                 /* if we got here, then we didn't match the name of any slave */
1200
1201                 if (strlen(buf) == 0 || buf[0] == '\n') {
1202                         pr_info("%s: Setting active slave to None.\n",
1203                                 bond->dev->name);
1204                         bond->primary_slave = NULL;
1205                         bond_select_active_slave(bond);
1206                 } else {
1207                         pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1208                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1209                 }
1210         }
1211  out:
1212         write_unlock_bh(&bond->curr_slave_lock);
1213         read_unlock(&bond->lock);
1214         unblock_netpoll_tx();
1215
1216         rtnl_unlock();
1217
1218         return count;
1219
1220 }
1221 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1222                    bonding_show_active_slave, bonding_store_active_slave);
1223
1224
1225 /*
1226  * Show link status of the bond interface.
1227  */
1228 static ssize_t bonding_show_mii_status(struct device *d,
1229                                        struct device_attribute *attr,
1230                                        char *buf)
1231 {
1232         struct slave *curr;
1233         struct bonding *bond = to_bond(d);
1234
1235         read_lock(&bond->curr_slave_lock);
1236         curr = bond->curr_active_slave;
1237         read_unlock(&bond->curr_slave_lock);
1238
1239         return sprintf(buf, "%s\n", curr ? "up" : "down");
1240 }
1241 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1242
1243
1244 /*
1245  * Show current 802.3ad aggregator ID.
1246  */
1247 static ssize_t bonding_show_ad_aggregator(struct device *d,
1248                                           struct device_attribute *attr,
1249                                           char *buf)
1250 {
1251         int count = 0;
1252         struct bonding *bond = to_bond(d);
1253
1254         if (bond->params.mode == BOND_MODE_8023AD) {
1255                 struct ad_info ad_info;
1256                 count = sprintf(buf, "%d\n",
1257                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1258                                 ?  0 : ad_info.aggregator_id);
1259         }
1260
1261         return count;
1262 }
1263 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1264
1265
1266 /*
1267  * Show number of active 802.3ad ports.
1268  */
1269 static ssize_t bonding_show_ad_num_ports(struct device *d,
1270                                          struct device_attribute *attr,
1271                                          char *buf)
1272 {
1273         int count = 0;
1274         struct bonding *bond = to_bond(d);
1275
1276         if (bond->params.mode == BOND_MODE_8023AD) {
1277                 struct ad_info ad_info;
1278                 count = sprintf(buf, "%d\n",
1279                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1280                                 ?  0 : ad_info.ports);
1281         }
1282
1283         return count;
1284 }
1285 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1286
1287
1288 /*
1289  * Show current 802.3ad actor key.
1290  */
1291 static ssize_t bonding_show_ad_actor_key(struct device *d,
1292                                          struct device_attribute *attr,
1293                                          char *buf)
1294 {
1295         int count = 0;
1296         struct bonding *bond = to_bond(d);
1297
1298         if (bond->params.mode == BOND_MODE_8023AD) {
1299                 struct ad_info ad_info;
1300                 count = sprintf(buf, "%d\n",
1301                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1302                                 ?  0 : ad_info.actor_key);
1303         }
1304
1305         return count;
1306 }
1307 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1308
1309
1310 /*
1311  * Show current 802.3ad partner key.
1312  */
1313 static ssize_t bonding_show_ad_partner_key(struct device *d,
1314                                            struct device_attribute *attr,
1315                                            char *buf)
1316 {
1317         int count = 0;
1318         struct bonding *bond = to_bond(d);
1319
1320         if (bond->params.mode == BOND_MODE_8023AD) {
1321                 struct ad_info ad_info;
1322                 count = sprintf(buf, "%d\n",
1323                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1324                                 ?  0 : ad_info.partner_key);
1325         }
1326
1327         return count;
1328 }
1329 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1330
1331
1332 /*
1333  * Show current 802.3ad partner mac.
1334  */
1335 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1336                                            struct device_attribute *attr,
1337                                            char *buf)
1338 {
1339         int count = 0;
1340         struct bonding *bond = to_bond(d);
1341
1342         if (bond->params.mode == BOND_MODE_8023AD) {
1343                 struct ad_info ad_info;
1344                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1345                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1346         }
1347
1348         return count;
1349 }
1350 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1351
1352 /*
1353  * Show the queue_ids of the slaves in the current bond.
1354  */
1355 static ssize_t bonding_show_queue_id(struct device *d,
1356                                      struct device_attribute *attr,
1357                                      char *buf)
1358 {
1359         struct slave *slave;
1360         int i, res = 0;
1361         struct bonding *bond = to_bond(d);
1362
1363         if (!rtnl_trylock())
1364                 return restart_syscall();
1365
1366         read_lock(&bond->lock);
1367         bond_for_each_slave(bond, slave, i) {
1368                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1369                         /* not enough space for another interface_name:queue_id pair */
1370                         if ((PAGE_SIZE - res) > 10)
1371                                 res = PAGE_SIZE - 10;
1372                         res += sprintf(buf + res, "++more++ ");
1373                         break;
1374                 }
1375                 res += sprintf(buf + res, "%s:%d ",
1376                                slave->dev->name, slave->queue_id);
1377         }
1378         read_unlock(&bond->lock);
1379         if (res)
1380                 buf[res-1] = '\n'; /* eat the leftover space */
1381         rtnl_unlock();
1382         return res;
1383 }
1384
1385 /*
1386  * Set the queue_ids of the  slaves in the current bond.  The bond
1387  * interface must be enslaved for this to work.
1388  */
1389 static ssize_t bonding_store_queue_id(struct device *d,
1390                                       struct device_attribute *attr,
1391                                       const char *buffer, size_t count)
1392 {
1393         struct slave *slave, *update_slave;
1394         struct bonding *bond = to_bond(d);
1395         u16 qid;
1396         int i, ret = count;
1397         char *delim;
1398         struct net_device *sdev = NULL;
1399
1400         if (!rtnl_trylock())
1401                 return restart_syscall();
1402
1403         /* delim will point to queue id if successful */
1404         delim = strchr(buffer, ':');
1405         if (!delim)
1406                 goto err_no_cmd;
1407
1408         /*
1409          * Terminate string that points to device name and bump it
1410          * up one, so we can read the queue id there.
1411          */
1412         *delim = '\0';
1413         if (sscanf(++delim, "%hd\n", &qid) != 1)
1414                 goto err_no_cmd;
1415
1416         /* Check buffer length, valid ifname and queue id */
1417         if (strlen(buffer) > IFNAMSIZ ||
1418             !dev_valid_name(buffer) ||
1419             qid > bond->params.tx_queues)
1420                 goto err_no_cmd;
1421
1422         /* Get the pointer to that interface if it exists */
1423         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1424         if (!sdev)
1425                 goto err_no_cmd;
1426
1427         read_lock(&bond->lock);
1428
1429         /* Search for thes slave and check for duplicate qids */
1430         update_slave = NULL;
1431         bond_for_each_slave(bond, slave, i) {
1432                 if (sdev == slave->dev)
1433                         /*
1434                          * We don't need to check the matching
1435                          * slave for dups, since we're overwriting it
1436                          */
1437                         update_slave = slave;
1438                 else if (qid && qid == slave->queue_id) {
1439                         goto err_no_cmd_unlock;
1440                 }
1441         }
1442
1443         if (!update_slave)
1444                 goto err_no_cmd_unlock;
1445
1446         /* Actually set the qids for the slave */
1447         update_slave->queue_id = qid;
1448
1449         read_unlock(&bond->lock);
1450 out:
1451         rtnl_unlock();
1452         return ret;
1453
1454 err_no_cmd_unlock:
1455         read_unlock(&bond->lock);
1456 err_no_cmd:
1457         pr_info("invalid input for queue_id set for %s.\n",
1458                 bond->dev->name);
1459         ret = -EPERM;
1460         goto out;
1461 }
1462
1463 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1464                    bonding_store_queue_id);
1465
1466
1467 /*
1468  * Show and set the all_slaves_active flag.
1469  */
1470 static ssize_t bonding_show_slaves_active(struct device *d,
1471                                           struct device_attribute *attr,
1472                                           char *buf)
1473 {
1474         struct bonding *bond = to_bond(d);
1475
1476         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1477 }
1478
1479 static ssize_t bonding_store_slaves_active(struct device *d,
1480                                            struct device_attribute *attr,
1481                                            const char *buf, size_t count)
1482 {
1483         int i, new_value, ret = count;
1484         struct bonding *bond = to_bond(d);
1485         struct slave *slave;
1486
1487         if (sscanf(buf, "%d", &new_value) != 1) {
1488                 pr_err("%s: no all_slaves_active value specified.\n",
1489                        bond->dev->name);
1490                 ret = -EINVAL;
1491                 goto out;
1492         }
1493
1494         if (new_value == bond->params.all_slaves_active)
1495                 goto out;
1496
1497         if ((new_value == 0) || (new_value == 1)) {
1498                 bond->params.all_slaves_active = new_value;
1499         } else {
1500                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1501                         bond->dev->name, new_value);
1502                 ret = -EINVAL;
1503                 goto out;
1504         }
1505
1506         bond_for_each_slave(bond, slave, i) {
1507                 if (!bond_is_active_slave(slave)) {
1508                         if (new_value)
1509                                 slave->inactive = 0;
1510                         else
1511                                 slave->inactive = 1;
1512                 }
1513         }
1514 out:
1515         return ret;
1516 }
1517 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1518                    bonding_show_slaves_active, bonding_store_slaves_active);
1519
1520 /*
1521  * Show and set the number of IGMP membership reports to send on link failure
1522  */
1523 static ssize_t bonding_show_resend_igmp(struct device *d,
1524                                          struct device_attribute *attr,
1525                                          char *buf)
1526 {
1527         struct bonding *bond = to_bond(d);
1528
1529         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1530 }
1531
1532 static ssize_t bonding_store_resend_igmp(struct device *d,
1533                                           struct device_attribute *attr,
1534                                           const char *buf, size_t count)
1535 {
1536         int new_value, ret = count;
1537         struct bonding *bond = to_bond(d);
1538
1539         if (sscanf(buf, "%d", &new_value) != 1) {
1540                 pr_err("%s: no resend_igmp value specified.\n",
1541                        bond->dev->name);
1542                 ret = -EINVAL;
1543                 goto out;
1544         }
1545
1546         if (new_value < 0) {
1547                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1548                        bond->dev->name, new_value);
1549                 ret = -EINVAL;
1550                 goto out;
1551         }
1552
1553         pr_info("%s: Setting resend_igmp to %d.\n",
1554                 bond->dev->name, new_value);
1555         bond->params.resend_igmp = new_value;
1556 out:
1557         return ret;
1558 }
1559
1560 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1561                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1562
1563 static struct attribute *per_bond_attrs[] = {
1564         &dev_attr_slaves.attr,
1565         &dev_attr_mode.attr,
1566         &dev_attr_fail_over_mac.attr,
1567         &dev_attr_arp_validate.attr,
1568         &dev_attr_arp_interval.attr,
1569         &dev_attr_arp_ip_target.attr,
1570         &dev_attr_downdelay.attr,
1571         &dev_attr_updelay.attr,
1572         &dev_attr_lacp_rate.attr,
1573         &dev_attr_ad_select.attr,
1574         &dev_attr_xmit_hash_policy.attr,
1575         &dev_attr_miimon.attr,
1576         &dev_attr_primary.attr,
1577         &dev_attr_primary_reselect.attr,
1578         &dev_attr_use_carrier.attr,
1579         &dev_attr_active_slave.attr,
1580         &dev_attr_mii_status.attr,
1581         &dev_attr_ad_aggregator.attr,
1582         &dev_attr_ad_num_ports.attr,
1583         &dev_attr_ad_actor_key.attr,
1584         &dev_attr_ad_partner_key.attr,
1585         &dev_attr_ad_partner_mac.attr,
1586         &dev_attr_queue_id.attr,
1587         &dev_attr_all_slaves_active.attr,
1588         &dev_attr_resend_igmp.attr,
1589         NULL,
1590 };
1591
1592 static struct attribute_group bonding_group = {
1593         .name = "bonding",
1594         .attrs = per_bond_attrs,
1595 };
1596
1597 /*
1598  * Initialize sysfs.  This sets up the bonding_masters file in
1599  * /sys/class/net.
1600  */
1601 int bond_create_sysfs(void)
1602 {
1603         int ret;
1604
1605         ret = netdev_class_create_file(&class_attr_bonding_masters);
1606         /*
1607          * Permit multiple loads of the module by ignoring failures to
1608          * create the bonding_masters sysfs file.  Bonding devices
1609          * created by second or subsequent loads of the module will
1610          * not be listed in, or controllable by, bonding_masters, but
1611          * will have the usual "bonding" sysfs directory.
1612          *
1613          * This is done to preserve backwards compatibility for
1614          * initscripts/sysconfig, which load bonding multiple times to
1615          * configure multiple bonding devices.
1616          */
1617         if (ret == -EEXIST) {
1618                 /* Is someone being kinky and naming a device bonding_master? */
1619                 if (__dev_get_by_name(&init_net,
1620                                       class_attr_bonding_masters.attr.name))
1621                         pr_err("network device named %s already exists in sysfs",
1622                                class_attr_bonding_masters.attr.name);
1623                 ret = 0;
1624         }
1625
1626         return ret;
1627
1628 }
1629
1630 /*
1631  * Remove /sys/class/net/bonding_masters.
1632  */
1633 void bond_destroy_sysfs(void)
1634 {
1635         netdev_class_remove_file(&class_attr_bonding_masters);
1636 }
1637
1638 /*
1639  * Initialize sysfs for each bond.  This sets up and registers
1640  * the 'bondctl' directory for each individual bond under /sys/class/net.
1641  */
1642 void bond_prepare_sysfs_group(struct bonding *bond)
1643 {
1644         bond->dev->sysfs_groups[0] = &bonding_group;
1645 }
1646