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/fs.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/inetdevice.h>
  34 #include <linux/in.h>
  35 #include <linux/sysfs.h>
  36 #include <linux/ctype.h>
  37 #include <linux/inet.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/etherdevice.h>
  40 #include <net/net_namespace.h>
  41 #include <net/netns/generic.h>
  42 #include <linux/nsproxy.h>
  43
  44 #include "bonding.h"
  45
  46 #define to_dev(obj)     container_of(obj, struct device, kobj)
  47 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  48
  49 /*
  50  * "show" function for the bond_masters attribute.
  51  * The class parameter is ignored.
  52  */
  53 static ssize_t bonding_show_bonds(struct class *cls,
  54                                   struct class_attribute *attr,
  55                                   char *buf)
  56 {
  57         struct bond_net *bn =
  58                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  59         int res = 0;
  60         struct bonding *bond;
  61
  62         rtnl_lock();
  63
  64         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  65                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  66                         /* not enough space for another interface name */
  67                         if ((PAGE_SIZE - res) > 10)
  68                                 res = PAGE_SIZE - 10;
  69                         res += sprintf(buf + res, "++more++ ");
  70                         break;
  71                 }
  72                 res += sprintf(buf + res, "%s ", bond->dev->name);
  73         }
  74         if (res)
  75                 buf[res-1] = '\n'; /* eat the leftover space */
  76
  77         rtnl_unlock();
  78         return res;
  79 }
  80
  81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  82 {
  83         struct bonding *bond;
  84
  85         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  86                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  87                         return bond->dev;
  88         }
  89         return NULL;
  90 }
  91
  92 /*
  93  * "store" function for the bond_masters attribute.  This is what
  94  * creates and deletes entire bonds.
  95  *
  96  * The class parameter is ignored.
  97  *
  98  */
  99
 100 static ssize_t bonding_store_bonds(struct class *cls,
 101                                    struct class_attribute *attr,
 102                                    const char *buffer, size_t count)
 103 {
 104         struct bond_net *bn =
 105                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 106         char command[IFNAMSIZ + 1] = {0, };
 107         char *ifname;
 108         int rv, res = count;
 109
 110         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 111         ifname = command + 1;
 112         if ((strlen(command) <= 1) ||
 113             !dev_valid_name(ifname))
 114                 goto err_no_cmd;
 115
 116         if (command[0] == '+') {
 117                 pr_info("%s is being created...\n", ifname);
 118                 rv = bond_create(bn->net, ifname);
 119                 if (rv) {
 120                         if (rv == -EEXIST)
 121                                 pr_info("%s already exists.\n", ifname);
 122                         else
 123                                 pr_info("%s creation failed.\n", ifname);
 124                         res = rv;
 125                 }
 126         } else if (command[0] == '-') {
 127                 struct net_device *bond_dev;
 128
 129                 rtnl_lock();
 130                 bond_dev = bond_get_by_name(bn, ifname);
 131                 if (bond_dev) {
 132                         pr_info("%s is being deleted...\n", ifname);
 133                         unregister_netdevice(bond_dev);
 134                 } else {
 135                         pr_err("unable to delete non-existent %s\n", ifname);
 136                         res = -ENODEV;
 137                 }
 138                 rtnl_unlock();
 139         } else
 140                 goto err_no_cmd;
 141
 142         /* Always return either count or an error.  If you return 0, you'll
 143          * get called forever, which is bad.
 144          */
 145         return res;
 146
 147 err_no_cmd:
 148         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 149         return -EPERM;
 150 }
 151
 152 static const void *bonding_namespace(struct class *cls,
 153                                      const struct class_attribute *attr)
 154 {
 155         const struct bond_net *bn =
 156                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 157         return bn->net;
 158 }
 159
 160 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 161 static const struct class_attribute class_attr_bonding_masters = {
 162         .attr = {
 163                 .name = "bonding_masters",
 164                 .mode = S_IWUSR | S_IRUGO,
 165         },
 166         .show = bonding_show_bonds,
 167         .store = bonding_store_bonds,
 168         .namespace = bonding_namespace,
 169 };
 170
 171 int bond_create_slave_symlinks(struct net_device *master,
 172                                struct net_device *slave)
 173 {
 174         char linkname[IFNAMSIZ+7];
 175         int ret = 0;
 176
 177         /* first, create a link from the slave back to the master */
 178         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 179                                 "master");
 180         if (ret)
 181                 return ret;
 182         /* next, create a link from the master to the slave */
 183         sprintf(linkname, "slave_%s", slave->name);
 184         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 185                                 linkname);
 186         return ret;
 187
 188 }
 189
 190 void bond_destroy_slave_symlinks(struct net_device *master,
 191                                  struct net_device *slave)
 192 {
 193         char linkname[IFNAMSIZ+7];
 194
 195         sysfs_remove_link(&(slave->dev.kobj), "master");
 196         sprintf(linkname, "slave_%s", slave->name);
 197         sysfs_remove_link(&(master->dev.kobj), linkname);
 198 }
 199
 200
 201 /*
 202  * Show the slaves in the current bond.
 203  */
 204 static ssize_t bonding_show_slaves(struct device *d,
 205                                    struct device_attribute *attr, char *buf)
 206 {
 207         struct slave *slave;
 208         int i, res = 0;
 209         struct bonding *bond = to_bond(d);
 210
 211         read_lock(&bond->lock);
 212         bond_for_each_slave(bond, slave, i) {
 213                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 214                         /* not enough space for another interface name */
 215                         if ((PAGE_SIZE - res) > 10)
 216                                 res = PAGE_SIZE - 10;
 217                         res += sprintf(buf + res, "++more++ ");
 218                         break;
 219                 }
 220                 res += sprintf(buf + res, "%s ", slave->dev->name);
 221         }
 222         read_unlock(&bond->lock);
 223         if (res)
 224                 buf[res-1] = '\n'; /* eat the leftover space */
 225         return res;
 226 }
 227
 228 /*
 229  * Set the slaves in the current bond.  The bond interface must be
 230  * up for this to succeed.
 231  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 232  * All hard work should be done there.
 233  */
 234 static ssize_t bonding_store_slaves(struct device *d,
 235                                     struct device_attribute *attr,
 236                                     const char *buffer, size_t count)
 237 {
 238         char command[IFNAMSIZ + 1] = { 0, };
 239         char *ifname;
 240         int res, ret = count;
 241         struct net_device *dev;
 242         struct bonding *bond = to_bond(d);
 243
 244         if (!rtnl_trylock())
 245                 return restart_syscall();
 246
 247         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 248         ifname = command + 1;
 249         if ((strlen(command) <= 1) ||
 250             !dev_valid_name(ifname))
 251                 goto err_no_cmd;
 252
 253         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 254         if (!dev) {
 255                 pr_info("%s: Interface %s does not exist!\n",
 256                         bond->dev->name, ifname);
 257                 ret = -ENODEV;
 258                 goto out;
 259         }
 260
 261         switch (command[0]) {
 262         case '+':
 263                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 264                 res = bond_enslave(bond->dev, dev);
 265                 break;
 266
 267         case '-':
 268                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 269                 res = bond_release(bond->dev, dev);
 270                 break;
 271
 272         default:
 273                 goto err_no_cmd;
 274         }
 275
 276         if (res)
 277                 ret = res;
 278         goto out;
 279
 280 err_no_cmd:
 281         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 282                bond->dev->name);
 283         ret = -EPERM;
 284
 285 out:
 286         rtnl_unlock();
 287         return ret;
 288 }
 289
 290 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 291                    bonding_store_slaves);
 292
 293 /*
 294  * Show and set the bonding mode.  The bond interface must be down to
 295  * change the mode.
 296  */
 297 static ssize_t bonding_show_mode(struct device *d,
 298                                  struct device_attribute *attr, char *buf)
 299 {
 300         struct bonding *bond = to_bond(d);
 301
 302         return sprintf(buf, "%s %d\n",
 303                         bond_mode_tbl[bond->params.mode].modename,
 304                         bond->params.mode);
 305 }
 306
 307 static ssize_t bonding_store_mode(struct device *d,
 308                                   struct device_attribute *attr,
 309                                   const char *buf, size_t count)
 310 {
 311         int new_value, ret = count;
 312         struct bonding *bond = to_bond(d);
 313
 314         if (bond->dev->flags & IFF_UP) {
 315                 pr_err("unable to update mode of %s because interface is up.\n",
 316                        bond->dev->name);
 317                 ret = -EPERM;
 318                 goto out;
 319         }
 320
 321         if (bond->slave_cnt > 0) {
 322                 pr_err("unable to update mode of %s because it has slaves.\n",
 323                         bond->dev->name);
 324                 ret = -EPERM;
 325                 goto out;
 326         }
 327
 328         new_value = bond_parse_parm(buf, bond_mode_tbl);
 329         if (new_value < 0)  {
 330                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 331                        bond->dev->name, (int)strlen(buf) - 1, buf);
 332                 ret = -EINVAL;
 333                 goto out;
 334         }
 335         if ((new_value == BOND_MODE_ALB ||
 336              new_value == BOND_MODE_TLB) &&
 337             bond->params.arp_interval) {
 338                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 339                        bond->dev->name, bond_mode_tbl[new_value].modename);
 340                 ret = -EINVAL;
 341                 goto out;
 342         }
 343
 344         bond->params.mode = new_value;
 345         bond_set_mode_ops(bond, bond->params.mode);
 346         pr_info("%s: setting mode to %s (%d).\n",
 347                 bond->dev->name, bond_mode_tbl[new_value].modename,
 348                 new_value);
 349 out:
 350         return ret;
 351 }
 352 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 353                    bonding_show_mode, bonding_store_mode);
 354
 355 /*
 356  * Show and set the bonding transmit hash method.
 357  * The bond interface must be down to change the xmit hash policy.
 358  */
 359 static ssize_t bonding_show_xmit_hash(struct device *d,
 360                                       struct device_attribute *attr,
 361                                       char *buf)
 362 {
 363         struct bonding *bond = to_bond(d);
 364
 365         return sprintf(buf, "%s %d\n",
 366                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 367                        bond->params.xmit_policy);
 368 }
 369
 370 static ssize_t bonding_store_xmit_hash(struct device *d,
 371                                        struct device_attribute *attr,
 372                                        const char *buf, size_t count)
 373 {
 374         int new_value, ret = count;
 375         struct bonding *bond = to_bond(d);
 376
 377         if (bond->dev->flags & IFF_UP) {
 378                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 379                        bond->dev->name);
 380                 ret = -EPERM;
 381                 goto out;
 382         }
 383
 384         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 385         if (new_value < 0)  {
 386                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 387                        bond->dev->name,
 388                        (int)strlen(buf) - 1, buf);
 389                 ret = -EINVAL;
 390                 goto out;
 391         } else {
 392                 bond->params.xmit_policy = new_value;
 393                 bond_set_mode_ops(bond, bond->params.mode);
 394                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 395                         bond->dev->name,
 396                         xmit_hashtype_tbl[new_value].modename, new_value);
 397         }
 398 out:
 399         return ret;
 400 }
 401 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 402                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 403
 404 /*
 405  * Show and set arp_validate.
 406  */
 407 static ssize_t bonding_show_arp_validate(struct device *d,
 408                                          struct device_attribute *attr,
 409                                          char *buf)
 410 {
 411         struct bonding *bond = to_bond(d);
 412
 413         return sprintf(buf, "%s %d\n",
 414                        arp_validate_tbl[bond->params.arp_validate].modename,
 415                        bond->params.arp_validate);
 416 }
 417
 418 static ssize_t bonding_store_arp_validate(struct device *d,
 419                                           struct device_attribute *attr,
 420                                           const char *buf, size_t count)
 421 {
 422         int new_value;
 423         struct bonding *bond = to_bond(d);
 424
 425         new_value = bond_parse_parm(buf, arp_validate_tbl);
 426         if (new_value < 0) {
 427                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 428                        bond->dev->name, buf);
 429                 return -EINVAL;
 430         }
 431         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 432                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 433                        bond->dev->name);
 434                 return -EINVAL;
 435         }
 436         pr_info("%s: setting arp_validate to %s (%d).\n",
 437                 bond->dev->name, arp_validate_tbl[new_value].modename,
 438                 new_value);
 439
 440         bond->params.arp_validate = new_value;
 441
 442         return count;
 443 }
 444
 445 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 446                    bonding_store_arp_validate);
 447
 448 /*
 449  * Show and store fail_over_mac.  User only allowed to change the
 450  * value when there are no slaves.
 451  */
 452 static ssize_t bonding_show_fail_over_mac(struct device *d,
 453                                           struct device_attribute *attr,
 454                                           char *buf)
 455 {
 456         struct bonding *bond = to_bond(d);
 457
 458         return sprintf(buf, "%s %d\n",
 459                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 460                        bond->params.fail_over_mac);
 461 }
 462
 463 static ssize_t bonding_store_fail_over_mac(struct device *d,
 464                                            struct device_attribute *attr,
 465                                            const char *buf, size_t count)
 466 {
 467         int new_value;
 468         struct bonding *bond = to_bond(d);
 469
 470         if (bond->slave_cnt != 0) {
 471                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 472                        bond->dev->name);
 473                 return -EPERM;
 474         }
 475
 476         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 477         if (new_value < 0) {
 478                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 479                        bond->dev->name, buf);
 480                 return -EINVAL;
 481         }
 482
 483         bond->params.fail_over_mac = new_value;
 484         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 485                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 486                 new_value);
 487
 488         return count;
 489 }
 490
 491 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 492                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 493
 494 /*
 495  * Show and set the arp timer interval.  There are two tricky bits
 496  * here.  First, if ARP monitoring is activated, then we must disable
 497  * MII monitoring.  Second, if the ARP timer isn't running, we must
 498  * start it.
 499  */
 500 static ssize_t bonding_show_arp_interval(struct device *d,
 501                                          struct device_attribute *attr,
 502                                          char *buf)
 503 {
 504         struct bonding *bond = to_bond(d);
 505
 506         return sprintf(buf, "%d\n", bond->params.arp_interval);
 507 }
 508
 509 static ssize_t bonding_store_arp_interval(struct device *d,
 510                                           struct device_attribute *attr,
 511                                           const char *buf, size_t count)
 512 {
 513         int new_value, ret = count;
 514         struct bonding *bond = to_bond(d);
 515
 516         if (!rtnl_trylock())
 517                 return restart_syscall();
 518         if (sscanf(buf, "%d", &new_value) != 1) {
 519                 pr_err("%s: no arp_interval value specified.\n",
 520                        bond->dev->name);
 521                 ret = -EINVAL;
 522                 goto out;
 523         }
 524         if (new_value < 0) {
 525                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 526                        bond->dev->name, new_value, INT_MAX);
 527                 ret = -EINVAL;
 528                 goto out;
 529         }
 530         if (bond->params.mode == BOND_MODE_ALB ||
 531             bond->params.mode == BOND_MODE_TLB) {
 532                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 533                         bond->dev->name, bond->dev->name);
 534                 ret = -EINVAL;
 535                 goto out;
 536         }
 537         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 538                 bond->dev->name, new_value);
 539         bond->params.arp_interval = new_value;
 540         if (bond->params.miimon) {
 541                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 542                         bond->dev->name, bond->dev->name);
 543                 bond->params.miimon = 0;
 544         }
 545         if (!bond->params.arp_targets[0]) {
 546                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 547                         bond->dev->name);
 548         }
 549         if (bond->dev->flags & IFF_UP) {
 550                 /* If the interface is up, we may need to fire off
 551                  * the ARP timer.  If the interface is down, the
 552                  * timer will get fired off when the open function
 553                  * is called.
 554                  */
 555                 cancel_delayed_work_sync(&bond->mii_work);
 556                 queue_delayed_work(bond->wq, &bond->arp_work, 0);
 557         }
 558
 559 out:
 560         rtnl_unlock();
 561         return ret;
 562 }
 563 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 564                    bonding_show_arp_interval, bonding_store_arp_interval);
 565
 566 /*
 567  * Show and set the arp targets.
 568  */
 569 static ssize_t bonding_show_arp_targets(struct device *d,
 570                                         struct device_attribute *attr,
 571                                         char *buf)
 572 {
 573         int i, res = 0;
 574         struct bonding *bond = to_bond(d);
 575
 576         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 577                 if (bond->params.arp_targets[i])
 578                         res += sprintf(buf + res, "%pI4 ",
 579                                        &bond->params.arp_targets[i]);
 580         }
 581         if (res)
 582                 buf[res-1] = '\n'; /* eat the leftover space */
 583         return res;
 584 }
 585
 586 static ssize_t bonding_store_arp_targets(struct device *d,
 587                                          struct device_attribute *attr,
 588                                          const char *buf, size_t count)
 589 {
 590         __be32 newtarget;
 591         int i = 0, done = 0, ret = count;
 592         struct bonding *bond = to_bond(d);
 593         __be32 *targets;
 594
 595         targets = bond->params.arp_targets;
 596         newtarget = in_aton(buf + 1);
 597         /* look for adds */
 598         if (buf[0] == '+') {
 599                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 600                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 601                                bond->dev->name, &newtarget);
 602                         ret = -EINVAL;
 603                         goto out;
 604                 }
 605                 /* look for an empty slot to put the target in, and check for dupes */
 606                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 607                         if (targets[i] == newtarget) { /* duplicate */
 608                                 pr_err("%s: ARP target %pI4 is already present\n",
 609                                        bond->dev->name, &newtarget);
 610                                 ret = -EINVAL;
 611                                 goto out;
 612                         }
 613                         if (targets[i] == 0) {
 614                                 pr_info("%s: adding ARP target %pI4.\n",
 615                                         bond->dev->name, &newtarget);
 616                                 done = 1;
 617                                 targets[i] = newtarget;
 618                         }
 619                 }
 620                 if (!done) {
 621                         pr_err("%s: ARP target table is full!\n",
 622                                bond->dev->name);
 623                         ret = -EINVAL;
 624                         goto out;
 625                 }
 626
 627         } else if (buf[0] == '-')       {
 628                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 629                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 630                                bond->dev->name, &newtarget);
 631                         ret = -EINVAL;
 632                         goto out;
 633                 }
 634
 635                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 636                         if (targets[i] == newtarget) {
 637                                 int j;
 638                                 pr_info("%s: removing ARP target %pI4.\n",
 639                                         bond->dev->name, &newtarget);
 640                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 641                                         targets[j] = targets[j+1];
 642
 643                                 targets[j] = 0;
 644                                 done = 1;
 645                         }
 646                 }
 647                 if (!done) {
 648                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 649                                 bond->dev->name, &newtarget);
 650                         ret = -EINVAL;
 651                         goto out;
 652                 }
 653         } else {
 654                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 655                        bond->dev->name);
 656                 ret = -EPERM;
 657                 goto out;
 658         }
 659
 660 out:
 661         return ret;
 662 }
 663 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 664
 665 /*
 666  * Show and set the up and down delays.  These must be multiples of the
 667  * MII monitoring value, and are stored internally as the multiplier.
 668  * Thus, we must translate to MS for the real world.
 669  */
 670 static ssize_t bonding_show_downdelay(struct device *d,
 671                                       struct device_attribute *attr,
 672                                       char *buf)
 673 {
 674         struct bonding *bond = to_bond(d);
 675
 676         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 677 }
 678
 679 static ssize_t bonding_store_downdelay(struct device *d,
 680                                        struct device_attribute *attr,
 681                                        const char *buf, size_t count)
 682 {
 683         int new_value, ret = count;
 684         struct bonding *bond = to_bond(d);
 685
 686         if (!(bond->params.miimon)) {
 687                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 688                        bond->dev->name);
 689                 ret = -EPERM;
 690                 goto out;
 691         }
 692
 693         if (sscanf(buf, "%d", &new_value) != 1) {
 694                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 695                 ret = -EINVAL;
 696                 goto out;
 697         }
 698         if (new_value < 0) {
 699                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 700                        bond->dev->name, new_value, 1, INT_MAX);
 701                 ret = -EINVAL;
 702                 goto out;
 703         } else {
 704                 if ((new_value % bond->params.miimon) != 0) {
 705                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 706                                    bond->dev->name, new_value,
 707                                    bond->params.miimon,
 708                                    (new_value / bond->params.miimon) *
 709                                    bond->params.miimon);
 710                 }
 711                 bond->params.downdelay = new_value / bond->params.miimon;
 712                 pr_info("%s: Setting down delay to %d.\n",
 713                         bond->dev->name,
 714                         bond->params.downdelay * bond->params.miimon);
 715
 716         }
 717
 718 out:
 719         return ret;
 720 }
 721 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 722                    bonding_show_downdelay, bonding_store_downdelay);
 723
 724 static ssize_t bonding_show_updelay(struct device *d,
 725                                     struct device_attribute *attr,
 726                                     char *buf)
 727 {
 728         struct bonding *bond = to_bond(d);
 729
 730         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 731
 732 }
 733
 734 static ssize_t bonding_store_updelay(struct device *d,
 735                                      struct device_attribute *attr,
 736                                      const char *buf, size_t count)
 737 {
 738         int new_value, ret = count;
 739         struct bonding *bond = to_bond(d);
 740
 741         if (!(bond->params.miimon)) {
 742                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 743                        bond->dev->name);
 744                 ret = -EPERM;
 745                 goto out;
 746         }
 747
 748         if (sscanf(buf, "%d", &new_value) != 1) {
 749                 pr_err("%s: no up delay value specified.\n",
 750                        bond->dev->name);
 751                 ret = -EINVAL;
 752                 goto out;
 753         }
 754         if (new_value < 0) {
 755                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 756                        bond->dev->name, new_value, 1, INT_MAX);
 757                 ret = -EINVAL;
 758                 goto out;
 759         } else {
 760                 if ((new_value % bond->params.miimon) != 0) {
 761                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 762                                    bond->dev->name, new_value,
 763                                    bond->params.miimon,
 764                                    (new_value / bond->params.miimon) *
 765                                    bond->params.miimon);
 766                 }
 767                 bond->params.updelay = new_value / bond->params.miimon;
 768                 pr_info("%s: Setting up delay to %d.\n",
 769                         bond->dev->name,
 770                         bond->params.updelay * bond->params.miimon);
 771         }
 772
 773 out:
 774         return ret;
 775 }
 776 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 777                    bonding_show_updelay, bonding_store_updelay);
 778
 779 /*
 780  * Show and set the LACP interval.  Interface must be down, and the mode
 781  * must be set to 802.3ad mode.
 782  */
 783 static ssize_t bonding_show_lacp(struct device *d,
 784                                  struct device_attribute *attr,
 785                                  char *buf)
 786 {
 787         struct bonding *bond = to_bond(d);
 788
 789         return sprintf(buf, "%s %d\n",
 790                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 791                 bond->params.lacp_fast);
 792 }
 793
 794 static ssize_t bonding_store_lacp(struct device *d,
 795                                   struct device_attribute *attr,
 796                                   const char *buf, size_t count)
 797 {
 798         int new_value, ret = count;
 799         struct bonding *bond = to_bond(d);
 800
 801         if (bond->dev->flags & IFF_UP) {
 802                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 803                        bond->dev->name);
 804                 ret = -EPERM;
 805                 goto out;
 806         }
 807
 808         if (bond->params.mode != BOND_MODE_8023AD) {
 809                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 810                        bond->dev->name);
 811                 ret = -EPERM;
 812                 goto out;
 813         }
 814
 815         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 816
 817         if ((new_value == 1) || (new_value == 0)) {
 818                 bond->params.lacp_fast = new_value;
 819                 bond_3ad_update_lacp_rate(bond);
 820                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 821                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 822                         new_value);
 823         } else {
 824                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 825                        bond->dev->name, (int)strlen(buf) - 1, buf);
 826                 ret = -EINVAL;
 827         }
 828 out:
 829         return ret;
 830 }
 831 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 832                    bonding_show_lacp, bonding_store_lacp);
 833
 834 static ssize_t bonding_show_min_links(struct device *d,
 835                                       struct device_attribute *attr,
 836                                       char *buf)
 837 {
 838         struct bonding *bond = to_bond(d);
 839
 840         return sprintf(buf, "%d\n", bond->params.min_links);
 841 }
 842
 843 static ssize_t bonding_store_min_links(struct device *d,
 844                                        struct device_attribute *attr,
 845                                        const char *buf, size_t count)
 846 {
 847         struct bonding *bond = to_bond(d);
 848         int ret;
 849         unsigned int new_value;
 850
 851         ret = kstrtouint(buf, 0, &new_value);
 852         if (ret < 0) {
 853                 pr_err("%s: Ignoring invalid min links value %s.\n",
 854                        bond->dev->name, buf);
 855                 return ret;
 856         }
 857
 858         pr_info("%s: Setting min links value to %u\n",
 859                 bond->dev->name, new_value);
 860         bond->params.min_links = new_value;
 861         return count;
 862 }
 863 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 864                    bonding_show_min_links, bonding_store_min_links);
 865
 866 static ssize_t bonding_show_ad_select(struct device *d,
 867                                       struct device_attribute *attr,
 868                                       char *buf)
 869 {
 870         struct bonding *bond = to_bond(d);
 871
 872         return sprintf(buf, "%s %d\n",
 873                 ad_select_tbl[bond->params.ad_select].modename,
 874                 bond->params.ad_select);
 875 }
 876
 877
 878 static ssize_t bonding_store_ad_select(struct device *d,
 879                                        struct device_attribute *attr,
 880                                        const char *buf, size_t count)
 881 {
 882         int new_value, ret = count;
 883         struct bonding *bond = to_bond(d);
 884
 885         if (bond->dev->flags & IFF_UP) {
 886                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 887                        bond->dev->name);
 888                 ret = -EPERM;
 889                 goto out;
 890         }
 891
 892         new_value = bond_parse_parm(buf, ad_select_tbl);
 893
 894         if (new_value != -1) {
 895                 bond->params.ad_select = new_value;
 896                 pr_info("%s: Setting ad_select to %s (%d).\n",
 897                         bond->dev->name, ad_select_tbl[new_value].modename,
 898                         new_value);
 899         } else {
 900                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 901                        bond->dev->name, (int)strlen(buf) - 1, buf);
 902                 ret = -EINVAL;
 903         }
 904 out:
 905         return ret;
 906 }
 907 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 908                    bonding_show_ad_select, bonding_store_ad_select);
 909
 910 /*
 911  * Show and set the number of peer notifications to send after a failover event.
 912  */
 913 static ssize_t bonding_show_num_peer_notif(struct device *d,
 914                                            struct device_attribute *attr,
 915                                            char *buf)
 916 {
 917         struct bonding *bond = to_bond(d);
 918         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 919 }
 920
 921 static ssize_t bonding_store_num_peer_notif(struct device *d,
 922                                             struct device_attribute *attr,
 923                                             const char *buf, size_t count)
 924 {
 925         struct bonding *bond = to_bond(d);
 926         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 927         return err ? err : count;
 928 }
 929 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 930                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 931 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 932                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 933
 934 /*
 935  * Show and set the MII monitor interval.  There are two tricky bits
 936  * here.  First, if MII monitoring is activated, then we must disable
 937  * ARP monitoring.  Second, if the timer isn't running, we must
 938  * start it.
 939  */
 940 static ssize_t bonding_show_miimon(struct device *d,
 941                                    struct device_attribute *attr,
 942                                    char *buf)
 943 {
 944         struct bonding *bond = to_bond(d);
 945
 946         return sprintf(buf, "%d\n", bond->params.miimon);
 947 }
 948
 949 static ssize_t bonding_store_miimon(struct device *d,
 950                                     struct device_attribute *attr,
 951                                     const char *buf, size_t count)
 952 {
 953         int new_value, ret = count;
 954         struct bonding *bond = to_bond(d);
 955
 956         if (!rtnl_trylock())
 957                 return restart_syscall();
 958         if (sscanf(buf, "%d", &new_value) != 1) {
 959                 pr_err("%s: no miimon value specified.\n",
 960                        bond->dev->name);
 961                 ret = -EINVAL;
 962                 goto out;
 963         }
 964         if (new_value < 0) {
 965                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 966                        bond->dev->name, new_value, 1, INT_MAX);
 967                 ret = -EINVAL;
 968                 goto out;
 969         } else {
 970                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 971                         bond->dev->name, new_value);
 972                 bond->params.miimon = new_value;
 973                 if (bond->params.updelay)
 974                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 975                                 bond->dev->name,
 976                                 bond->params.updelay * bond->params.miimon);
 977                 if (bond->params.downdelay)
 978                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 979                                 bond->dev->name,
 980                                 bond->params.downdelay * bond->params.miimon);
 981                 if (bond->params.arp_interval) {
 982                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 983                                 bond->dev->name);
 984                         bond->params.arp_interval = 0;
 985                         if (bond->params.arp_validate) {
 986                                 bond->params.arp_validate =
 987                                         BOND_ARP_VALIDATE_NONE;
 988                         }
 989                 }
 990
 991                 if (bond->dev->flags & IFF_UP) {
 992                         /* If the interface is up, we may need to fire off
 993                          * the MII timer. If the interface is down, the
 994                          * timer will get fired off when the open function
 995                          * is called.
 996                          */
 997                         cancel_delayed_work_sync(&bond->arp_work);
 998                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 999                 }
1000         }
1001 out:
1002         rtnl_unlock();
1003         return ret;
1004 }
1005 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1006                    bonding_show_miimon, bonding_store_miimon);
1007
1008 /*
1009  * Show and set the primary slave.  The store function is much
1010  * simpler than bonding_store_slaves function because it only needs to
1011  * handle one interface name.
1012  * The bond must be a mode that supports a primary for this be
1013  * set.
1014  */
1015 static ssize_t bonding_show_primary(struct device *d,
1016                                     struct device_attribute *attr,
1017                                     char *buf)
1018 {
1019         int count = 0;
1020         struct bonding *bond = to_bond(d);
1021
1022         if (bond->primary_slave)
1023                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1024
1025         return count;
1026 }
1027
1028 static ssize_t bonding_store_primary(struct device *d,
1029                                      struct device_attribute *attr,
1030                                      const char *buf, size_t count)
1031 {
1032         int i;
1033         struct slave *slave;
1034         struct bonding *bond = to_bond(d);
1035         char ifname[IFNAMSIZ];
1036
1037         if (!rtnl_trylock())
1038                 return restart_syscall();
1039         block_netpoll_tx();
1040         read_lock(&bond->lock);
1041         write_lock_bh(&bond->curr_slave_lock);
1042
1043         if (!USES_PRIMARY(bond->params.mode)) {
1044                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1045                         bond->dev->name, bond->dev->name, bond->params.mode);
1046                 goto out;
1047         }
1048
1049         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1050
1051         /* check to see if we are clearing primary */
1052         if (!strlen(ifname) || buf[0] == '\n') {
1053                 pr_info("%s: Setting primary slave to None.\n",
1054                         bond->dev->name);
1055                 bond->primary_slave = NULL;
1056                 bond_select_active_slave(bond);
1057                 goto out;
1058         }
1059
1060         bond_for_each_slave(bond, slave, i) {
1061                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1062                         pr_info("%s: Setting %s as primary slave.\n",
1063                                 bond->dev->name, slave->dev->name);
1064                         bond->primary_slave = slave;
1065                         strcpy(bond->params.primary, slave->dev->name);
1066                         bond_select_active_slave(bond);
1067                         goto out;
1068                 }
1069         }
1070
1071         strncpy(bond->params.primary, ifname, IFNAMSIZ);
1072         bond->params.primary[IFNAMSIZ - 1] = 0;
1073
1074         pr_info("%s: Recording %s as primary, "
1075                 "but it has not been enslaved to %s yet.\n",
1076                 bond->dev->name, ifname, bond->dev->name);
1077 out:
1078         write_unlock_bh(&bond->curr_slave_lock);
1079         read_unlock(&bond->lock);
1080         unblock_netpoll_tx();
1081         rtnl_unlock();
1082
1083         return count;
1084 }
1085 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1086                    bonding_show_primary, bonding_store_primary);
1087
1088 /*
1089  * Show and set the primary_reselect flag.
1090  */
1091 static ssize_t bonding_show_primary_reselect(struct device *d,
1092                                              struct device_attribute *attr,
1093                                              char *buf)
1094 {
1095         struct bonding *bond = to_bond(d);
1096
1097         return sprintf(buf, "%s %d\n",
1098                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1099                        bond->params.primary_reselect);
1100 }
1101
1102 static ssize_t bonding_store_primary_reselect(struct device *d,
1103                                               struct device_attribute *attr,
1104                                               const char *buf, size_t count)
1105 {
1106         int new_value, ret = count;
1107         struct bonding *bond = to_bond(d);
1108
1109         if (!rtnl_trylock())
1110                 return restart_syscall();
1111
1112         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1113         if (new_value < 0)  {
1114                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1115                        bond->dev->name,
1116                        (int) strlen(buf) - 1, buf);
1117                 ret = -EINVAL;
1118                 goto out;
1119         }
1120
1121         bond->params.primary_reselect = new_value;
1122         pr_info("%s: setting primary_reselect to %s (%d).\n",
1123                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1124                 new_value);
1125
1126         block_netpoll_tx();
1127         read_lock(&bond->lock);
1128         write_lock_bh(&bond->curr_slave_lock);
1129         bond_select_active_slave(bond);
1130         write_unlock_bh(&bond->curr_slave_lock);
1131         read_unlock(&bond->lock);
1132         unblock_netpoll_tx();
1133 out:
1134         rtnl_unlock();
1135         return ret;
1136 }
1137 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1138                    bonding_show_primary_reselect,
1139                    bonding_store_primary_reselect);
1140
1141 /*
1142  * Show and set the use_carrier flag.
1143  */
1144 static ssize_t bonding_show_carrier(struct device *d,
1145                                     struct device_attribute *attr,
1146                                     char *buf)
1147 {
1148         struct bonding *bond = to_bond(d);
1149
1150         return sprintf(buf, "%d\n", bond->params.use_carrier);
1151 }
1152
1153 static ssize_t bonding_store_carrier(struct device *d,
1154                                      struct device_attribute *attr,
1155                                      const char *buf, size_t count)
1156 {
1157         int new_value, ret = count;
1158         struct bonding *bond = to_bond(d);
1159
1160
1161         if (sscanf(buf, "%d", &new_value) != 1) {
1162                 pr_err("%s: no use_carrier value specified.\n",
1163                        bond->dev->name);
1164                 ret = -EINVAL;
1165                 goto out;
1166         }
1167         if ((new_value == 0) || (new_value == 1)) {
1168                 bond->params.use_carrier = new_value;
1169                 pr_info("%s: Setting use_carrier to %d.\n",
1170                         bond->dev->name, new_value);
1171         } else {
1172                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1173                         bond->dev->name, new_value);
1174         }
1175 out:
1176         return ret;
1177 }
1178 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1179                    bonding_show_carrier, bonding_store_carrier);
1180
1181
1182 /*
1183  * Show and set currently active_slave.
1184  */
1185 static ssize_t bonding_show_active_slave(struct device *d,
1186                                          struct device_attribute *attr,
1187                                          char *buf)
1188 {
1189         struct slave *curr;
1190         struct bonding *bond = to_bond(d);
1191         int count = 0;
1192
1193         read_lock(&bond->curr_slave_lock);
1194         curr = bond->curr_active_slave;
1195         read_unlock(&bond->curr_slave_lock);
1196
1197         if (USES_PRIMARY(bond->params.mode) && curr)
1198                 count = sprintf(buf, "%s\n", curr->dev->name);
1199         return count;
1200 }
1201
1202 static ssize_t bonding_store_active_slave(struct device *d,
1203                                           struct device_attribute *attr,
1204                                           const char *buf, size_t count)
1205 {
1206         int i;
1207         struct slave *slave;
1208         struct slave *old_active = NULL;
1209         struct slave *new_active = NULL;
1210         struct bonding *bond = to_bond(d);
1211         char ifname[IFNAMSIZ];
1212
1213         if (!rtnl_trylock())
1214                 return restart_syscall();
1215
1216         block_netpoll_tx();
1217         read_lock(&bond->lock);
1218         write_lock_bh(&bond->curr_slave_lock);
1219
1220         if (!USES_PRIMARY(bond->params.mode)) {
1221                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1222                         bond->dev->name, bond->dev->name, bond->params.mode);
1223                 goto out;
1224         }
1225
1226         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1227
1228         /* check to see if we are clearing active */
1229         if (!strlen(ifname) || buf[0] == '\n') {
1230                 pr_info("%s: Clearing current active slave.\n",
1231                         bond->dev->name);
1232                 bond->curr_active_slave = NULL;
1233                 bond_select_active_slave(bond);
1234                 goto out;
1235         }
1236
1237         bond_for_each_slave(bond, slave, i) {
1238                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1239                         old_active = bond->curr_active_slave;
1240                         new_active = slave;
1241                         if (new_active == old_active) {
1242                                 /* do nothing */
1243                                 pr_info("%s: %s is already the current"
1244                                         " active slave.\n",
1245                                         bond->dev->name,
1246                                         slave->dev->name);
1247                                 goto out;
1248                         }
1249                         else {
1250                                 if ((new_active) &&
1251                                     (old_active) &&
1252                                     (new_active->link == BOND_LINK_UP) &&
1253                                     IS_UP(new_active->dev)) {
1254                                         pr_info("%s: Setting %s as active"
1255                                                 " slave.\n",
1256                                                 bond->dev->name,
1257                                                 slave->dev->name);
1258                                         bond_change_active_slave(bond,
1259                                                                  new_active);
1260                                 }
1261                                 else {
1262                                         pr_info("%s: Could not set %s as"
1263                                                 " active slave; either %s is"
1264                                                 " down or the link is down.\n",
1265                                                 bond->dev->name,
1266                                                 slave->dev->name,
1267                                                 slave->dev->name);
1268                                 }
1269                                 goto out;
1270                         }
1271                 }
1272         }
1273
1274         pr_info("%s: Unable to set %.*s as active slave.\n",
1275                 bond->dev->name, (int)strlen(buf) - 1, buf);
1276  out:
1277         write_unlock_bh(&bond->curr_slave_lock);
1278         read_unlock(&bond->lock);
1279         unblock_netpoll_tx();
1280
1281         rtnl_unlock();
1282
1283         return count;
1284
1285 }
1286 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1287                    bonding_show_active_slave, bonding_store_active_slave);
1288
1289
1290 /*
1291  * Show link status of the bond interface.
1292  */
1293 static ssize_t bonding_show_mii_status(struct device *d,
1294                                        struct device_attribute *attr,
1295                                        char *buf)
1296 {
1297         struct slave *curr;
1298         struct bonding *bond = to_bond(d);
1299
1300         read_lock(&bond->curr_slave_lock);
1301         curr = bond->curr_active_slave;
1302         read_unlock(&bond->curr_slave_lock);
1303
1304         return sprintf(buf, "%s\n", curr ? "up" : "down");
1305 }
1306 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1307
1308
1309 /*
1310  * Show current 802.3ad aggregator ID.
1311  */
1312 static ssize_t bonding_show_ad_aggregator(struct device *d,
1313                                           struct device_attribute *attr,
1314                                           char *buf)
1315 {
1316         int count = 0;
1317         struct bonding *bond = to_bond(d);
1318
1319         if (bond->params.mode == BOND_MODE_8023AD) {
1320                 struct ad_info ad_info;
1321                 count = sprintf(buf, "%d\n",
1322                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1323                                 ?  0 : ad_info.aggregator_id);
1324         }
1325
1326         return count;
1327 }
1328 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1329
1330
1331 /*
1332  * Show number of active 802.3ad ports.
1333  */
1334 static ssize_t bonding_show_ad_num_ports(struct device *d,
1335                                          struct device_attribute *attr,
1336                                          char *buf)
1337 {
1338         int count = 0;
1339         struct bonding *bond = to_bond(d);
1340
1341         if (bond->params.mode == BOND_MODE_8023AD) {
1342                 struct ad_info ad_info;
1343                 count = sprintf(buf, "%d\n",
1344                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1345                                 ?  0 : ad_info.ports);
1346         }
1347
1348         return count;
1349 }
1350 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1351
1352
1353 /*
1354  * Show current 802.3ad actor key.
1355  */
1356 static ssize_t bonding_show_ad_actor_key(struct device *d,
1357                                          struct device_attribute *attr,
1358                                          char *buf)
1359 {
1360         int count = 0;
1361         struct bonding *bond = to_bond(d);
1362
1363         if (bond->params.mode == BOND_MODE_8023AD) {
1364                 struct ad_info ad_info;
1365                 count = sprintf(buf, "%d\n",
1366                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1367                                 ?  0 : ad_info.actor_key);
1368         }
1369
1370         return count;
1371 }
1372 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1373
1374
1375 /*
1376  * Show current 802.3ad partner key.
1377  */
1378 static ssize_t bonding_show_ad_partner_key(struct device *d,
1379                                            struct device_attribute *attr,
1380                                            char *buf)
1381 {
1382         int count = 0;
1383         struct bonding *bond = to_bond(d);
1384
1385         if (bond->params.mode == BOND_MODE_8023AD) {
1386                 struct ad_info ad_info;
1387                 count = sprintf(buf, "%d\n",
1388                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1389                                 ?  0 : ad_info.partner_key);
1390         }
1391
1392         return count;
1393 }
1394 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1395
1396
1397 /*
1398  * Show current 802.3ad partner mac.
1399  */
1400 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1401                                            struct device_attribute *attr,
1402                                            char *buf)
1403 {
1404         int count = 0;
1405         struct bonding *bond = to_bond(d);
1406
1407         if (bond->params.mode == BOND_MODE_8023AD) {
1408                 struct ad_info ad_info;
1409                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1410                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1411         }
1412
1413         return count;
1414 }
1415 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1416
1417 /*
1418  * Show the queue_ids of the slaves in the current bond.
1419  */
1420 static ssize_t bonding_show_queue_id(struct device *d,
1421                                      struct device_attribute *attr,
1422                                      char *buf)
1423 {
1424         struct slave *slave;
1425         int i, res = 0;
1426         struct bonding *bond = to_bond(d);
1427
1428         if (!rtnl_trylock())
1429                 return restart_syscall();
1430
1431         read_lock(&bond->lock);
1432         bond_for_each_slave(bond, slave, i) {
1433                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1434                         /* not enough space for another interface_name:queue_id pair */
1435                         if ((PAGE_SIZE - res) > 10)
1436                                 res = PAGE_SIZE - 10;
1437                         res += sprintf(buf + res, "++more++ ");
1438                         break;
1439                 }
1440                 res += sprintf(buf + res, "%s:%d ",
1441                                slave->dev->name, slave->queue_id);
1442         }
1443         read_unlock(&bond->lock);
1444         if (res)
1445                 buf[res-1] = '\n'; /* eat the leftover space */
1446         rtnl_unlock();
1447         return res;
1448 }
1449
1450 /*
1451  * Set the queue_ids of the  slaves in the current bond.  The bond
1452  * interface must be enslaved for this to work.
1453  */
1454 static ssize_t bonding_store_queue_id(struct device *d,
1455                                       struct device_attribute *attr,
1456                                       const char *buffer, size_t count)
1457 {
1458         struct slave *slave, *update_slave;
1459         struct bonding *bond = to_bond(d);
1460         u16 qid;
1461         int i, ret = count;
1462         char *delim;
1463         struct net_device *sdev = NULL;
1464
1465         if (!rtnl_trylock())
1466                 return restart_syscall();
1467
1468         /* delim will point to queue id if successful */
1469         delim = strchr(buffer, ':');
1470         if (!delim)
1471                 goto err_no_cmd;
1472
1473         /*
1474          * Terminate string that points to device name and bump it
1475          * up one, so we can read the queue id there.
1476          */
1477         *delim = '\0';
1478         if (sscanf(++delim, "%hd\n", &qid) != 1)
1479                 goto err_no_cmd;
1480
1481         /* Check buffer length, valid ifname and queue id */
1482         if (strlen(buffer) > IFNAMSIZ ||
1483             !dev_valid_name(buffer) ||
1484             qid > bond->dev->real_num_tx_queues)
1485                 goto err_no_cmd;
1486
1487         /* Get the pointer to that interface if it exists */
1488         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1489         if (!sdev)
1490                 goto err_no_cmd;
1491
1492         read_lock(&bond->lock);
1493
1494         /* Search for thes slave and check for duplicate qids */
1495         update_slave = NULL;
1496         bond_for_each_slave(bond, slave, i) {
1497                 if (sdev == slave->dev)
1498                         /*
1499                          * We don't need to check the matching
1500                          * slave for dups, since we're overwriting it
1501                          */
1502                         update_slave = slave;
1503                 else if (qid && qid == slave->queue_id) {
1504                         goto err_no_cmd_unlock;
1505                 }
1506         }
1507
1508         if (!update_slave)
1509                 goto err_no_cmd_unlock;
1510
1511         /* Actually set the qids for the slave */
1512         update_slave->queue_id = qid;
1513
1514         read_unlock(&bond->lock);
1515 out:
1516         rtnl_unlock();
1517         return ret;
1518
1519 err_no_cmd_unlock:
1520         read_unlock(&bond->lock);
1521 err_no_cmd:
1522         pr_info("invalid input for queue_id set for %s.\n",
1523                 bond->dev->name);
1524         ret = -EPERM;
1525         goto out;
1526 }
1527
1528 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1529                    bonding_store_queue_id);
1530
1531
1532 /*
1533  * Show and set the all_slaves_active flag.
1534  */
1535 static ssize_t bonding_show_slaves_active(struct device *d,
1536                                           struct device_attribute *attr,
1537                                           char *buf)
1538 {
1539         struct bonding *bond = to_bond(d);
1540
1541         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1542 }
1543
1544 static ssize_t bonding_store_slaves_active(struct device *d,
1545                                            struct device_attribute *attr,
1546                                            const char *buf, size_t count)
1547 {
1548         int i, new_value, ret = count;
1549         struct bonding *bond = to_bond(d);
1550         struct slave *slave;
1551
1552         if (sscanf(buf, "%d", &new_value) != 1) {
1553                 pr_err("%s: no all_slaves_active value specified.\n",
1554                        bond->dev->name);
1555                 ret = -EINVAL;
1556                 goto out;
1557         }
1558
1559         if (new_value == bond->params.all_slaves_active)
1560                 goto out;
1561
1562         if ((new_value == 0) || (new_value == 1)) {
1563                 bond->params.all_slaves_active = new_value;
1564         } else {
1565                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1566                         bond->dev->name, new_value);
1567                 ret = -EINVAL;
1568                 goto out;
1569         }
1570
1571         bond_for_each_slave(bond, slave, i) {
1572                 if (!bond_is_active_slave(slave)) {
1573                         if (new_value)
1574                                 slave->inactive = 0;
1575                         else
1576                                 slave->inactive = 1;
1577                 }
1578         }
1579 out:
1580         return ret;
1581 }
1582 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1583                    bonding_show_slaves_active, bonding_store_slaves_active);
1584
1585 /*
1586  * Show and set the number of IGMP membership reports to send on link failure
1587  */
1588 static ssize_t bonding_show_resend_igmp(struct device *d,
1589                                         struct device_attribute *attr,
1590                                         char *buf)
1591 {
1592         struct bonding *bond = to_bond(d);
1593
1594         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1595 }
1596
1597 static ssize_t bonding_store_resend_igmp(struct device *d,
1598                                          struct device_attribute *attr,
1599                                          const char *buf, size_t count)
1600 {
1601         int new_value, ret = count;
1602         struct bonding *bond = to_bond(d);
1603
1604         if (sscanf(buf, "%d", &new_value) != 1) {
1605                 pr_err("%s: no resend_igmp value specified.\n",
1606                        bond->dev->name);
1607                 ret = -EINVAL;
1608                 goto out;
1609         }
1610
1611         if (new_value < 0 || new_value > 255) {
1612                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1613                        bond->dev->name, new_value);
1614                 ret = -EINVAL;
1615                 goto out;
1616         }
1617
1618         pr_info("%s: Setting resend_igmp to %d.\n",
1619                 bond->dev->name, new_value);
1620         bond->params.resend_igmp = new_value;
1621 out:
1622         return ret;
1623 }
1624
1625 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1626                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1627
1628 static struct attribute *per_bond_attrs[] = {
1629         &dev_attr_slaves.attr,
1630         &dev_attr_mode.attr,
1631         &dev_attr_fail_over_mac.attr,
1632         &dev_attr_arp_validate.attr,
1633         &dev_attr_arp_interval.attr,
1634         &dev_attr_arp_ip_target.attr,
1635         &dev_attr_downdelay.attr,
1636         &dev_attr_updelay.attr,
1637         &dev_attr_lacp_rate.attr,
1638         &dev_attr_ad_select.attr,
1639         &dev_attr_xmit_hash_policy.attr,
1640         &dev_attr_num_grat_arp.attr,
1641         &dev_attr_num_unsol_na.attr,
1642         &dev_attr_miimon.attr,
1643         &dev_attr_primary.attr,
1644         &dev_attr_primary_reselect.attr,
1645         &dev_attr_use_carrier.attr,
1646         &dev_attr_active_slave.attr,
1647         &dev_attr_mii_status.attr,
1648         &dev_attr_ad_aggregator.attr,
1649         &dev_attr_ad_num_ports.attr,
1650         &dev_attr_ad_actor_key.attr,
1651         &dev_attr_ad_partner_key.attr,
1652         &dev_attr_ad_partner_mac.attr,
1653         &dev_attr_queue_id.attr,
1654         &dev_attr_all_slaves_active.attr,
1655         &dev_attr_resend_igmp.attr,
1656         &dev_attr_min_links.attr,
1657         NULL,
1658 };
1659
1660 static struct attribute_group bonding_group = {
1661         .name = "bonding",
1662         .attrs = per_bond_attrs,
1663 };
1664
1665 /*
1666  * Initialize sysfs.  This sets up the bonding_masters file in
1667  * /sys/class/net.
1668  */
1669 int bond_create_sysfs(struct bond_net *bn)
1670 {
1671         int ret;
1672
1673         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1674         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1675
1676         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1677         /*
1678          * Permit multiple loads of the module by ignoring failures to
1679          * create the bonding_masters sysfs file.  Bonding devices
1680          * created by second or subsequent loads of the module will
1681          * not be listed in, or controllable by, bonding_masters, but
1682          * will have the usual "bonding" sysfs directory.
1683          *
1684          * This is done to preserve backwards compatibility for
1685          * initscripts/sysconfig, which load bonding multiple times to
1686          * configure multiple bonding devices.
1687          */
1688         if (ret == -EEXIST) {
1689                 /* Is someone being kinky and naming a device bonding_master? */
1690                 if (__dev_get_by_name(bn->net,
1691                                       class_attr_bonding_masters.attr.name))
1692                         pr_err("network device named %s already exists in sysfs",
1693                                class_attr_bonding_masters.attr.name);
1694                 ret = 0;
1695         }
1696
1697         return ret;
1698
1699 }
1700
1701 /*
1702  * Remove /sys/class/net/bonding_masters.
1703  */
1704 void bond_destroy_sysfs(struct bond_net *bn)
1705 {
1706         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1707 }
1708
1709 /*
1710  * Initialize sysfs for each bond.  This sets up and registers
1711  * the 'bondctl' directory for each individual bond under /sys/class/net.
1712  */
1713 void bond_prepare_sysfs_group(struct bonding *bond)
1714 {
1715         bond->dev->sysfs_groups[0] = &bonding_group;
1716 }
1717