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 bond_net *bn =
  59                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  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 bond_net *bn, const char *ifname)
  83 {
  84         struct bonding *bond;
  85
  86         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  87                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  88                         return bond->dev;
  89         }
  90         return NULL;
  91 }
  92
  93 /*
  94  * "store" function for the bond_masters attribute.  This is what
  95  * creates and deletes entire bonds.
  96  *
  97  * The class parameter is ignored.
  98  *
  99  */
 100
 101 static ssize_t bonding_store_bonds(struct class *cls,
 102                                    struct class_attribute *attr,
 103                                    const char *buffer, size_t count)
 104 {
 105         struct bond_net *bn =
 106                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 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(bn->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(bn, 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 static const void *bonding_namespace(struct class *cls,
 154                                      const struct class_attribute *attr)
 155 {
 156         const struct bond_net *bn =
 157                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 158         return bn->net;
 159 }
 160
 161 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 162 static const struct class_attribute class_attr_bonding_masters = {
 163         .attr = {
 164                 .name = "bonding_masters",
 165                 .mode = S_IWUSR | S_IRUGO,
 166         },
 167         .show = bonding_show_bonds,
 168         .store = bonding_store_bonds,
 169         .namespace = bonding_namespace,
 170 };
 171
 172 int bond_create_slave_symlinks(struct net_device *master,
 173                                struct net_device *slave)
 174 {
 175         char linkname[IFNAMSIZ+7];
 176         int ret = 0;
 177
 178         /* first, create a link from the slave back to the master */
 179         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 180                                 "master");
 181         if (ret)
 182                 return ret;
 183         /* next, create a link from the master to the slave */
 184         sprintf(linkname, "slave_%s", slave->name);
 185         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 186                                 linkname);
 187         return ret;
 188
 189 }
 190
 191 void bond_destroy_slave_symlinks(struct net_device *master,
 192                                  struct net_device *slave)
 193 {
 194         char linkname[IFNAMSIZ+7];
 195
 196         sysfs_remove_link(&(slave->dev.kobj), "master");
 197         sprintf(linkname, "slave_%s", slave->name);
 198         sysfs_remove_link(&(master->dev.kobj), linkname);
 199 }
 200
 201
 202 /*
 203  * Show the slaves in the current bond.
 204  */
 205 static ssize_t bonding_show_slaves(struct device *d,
 206                                    struct device_attribute *attr, char *buf)
 207 {
 208         struct slave *slave;
 209         int i, res = 0;
 210         struct bonding *bond = to_bond(d);
 211
 212         read_lock(&bond->lock);
 213         bond_for_each_slave(bond, slave, i) {
 214                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 215                         /* not enough space for another interface name */
 216                         if ((PAGE_SIZE - res) > 10)
 217                                 res = PAGE_SIZE - 10;
 218                         res += sprintf(buf + res, "++more++ ");
 219                         break;
 220                 }
 221                 res += sprintf(buf + res, "%s ", slave->dev->name);
 222         }
 223         read_unlock(&bond->lock);
 224         if (res)
 225                 buf[res-1] = '\n'; /* eat the leftover space */
 226         return res;
 227 }
 228
 229 /*
 230  * Set the slaves in the current bond.  The bond interface must be
 231  * up for this to succeed.
 232  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 233  * All hard work should be done there.
 234  */
 235 static ssize_t bonding_store_slaves(struct device *d,
 236                                     struct device_attribute *attr,
 237                                     const char *buffer, size_t count)
 238 {
 239         char command[IFNAMSIZ + 1] = { 0, };
 240         char *ifname;
 241         int res, ret = count;
 242         struct net_device *dev;
 243         struct bonding *bond = to_bond(d);
 244
 245         if (!rtnl_trylock())
 246                 return restart_syscall();
 247
 248         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 249         ifname = command + 1;
 250         if ((strlen(command) <= 1) ||
 251             !dev_valid_name(ifname))
 252                 goto err_no_cmd;
 253
 254         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 255         if (!dev) {
 256                 pr_info("%s: Interface %s does not exist!\n",
 257                         bond->dev->name, ifname);
 258                 ret = -ENODEV;
 259                 goto out;
 260         }
 261
 262         switch (command[0]) {
 263         case '+':
 264                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 265                 res = bond_enslave(bond->dev, dev);
 266                 break;
 267
 268         case '-':
 269                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 270                 res = bond_release(bond->dev, dev);
 271                 break;
 272
 273         default:
 274                 goto err_no_cmd;
 275         }
 276
 277         if (res)
 278                 ret = res;
 279         goto out;
 280
 281 err_no_cmd:
 282         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 283                bond->dev->name);
 284         ret = -EPERM;
 285
 286 out:
 287         rtnl_unlock();
 288         return ret;
 289 }
 290
 291 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 292                    bonding_store_slaves);
 293
 294 /*
 295  * Show and set the bonding mode.  The bond interface must be down to
 296  * change the mode.
 297  */
 298 static ssize_t bonding_show_mode(struct device *d,
 299                                  struct device_attribute *attr, char *buf)
 300 {
 301         struct bonding *bond = to_bond(d);
 302
 303         return sprintf(buf, "%s %d\n",
 304                         bond_mode_tbl[bond->params.mode].modename,
 305                         bond->params.mode);
 306 }
 307
 308 static ssize_t bonding_store_mode(struct device *d,
 309                                   struct device_attribute *attr,
 310                                   const char *buf, size_t count)
 311 {
 312         int new_value, ret = count;
 313         struct bonding *bond = to_bond(d);
 314
 315         if (bond->dev->flags & IFF_UP) {
 316                 pr_err("unable to update mode of %s because interface is up.\n",
 317                        bond->dev->name);
 318                 ret = -EPERM;
 319                 goto out;
 320         }
 321
 322         if (bond->slave_cnt > 0) {
 323                 pr_err("unable to update mode of %s because it has slaves.\n",
 324                         bond->dev->name);
 325                 ret = -EPERM;
 326                 goto out;
 327         }
 328
 329         new_value = bond_parse_parm(buf, bond_mode_tbl);
 330         if (new_value < 0)  {
 331                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 332                        bond->dev->name, (int)strlen(buf) - 1, buf);
 333                 ret = -EINVAL;
 334                 goto out;
 335         }
 336         if ((new_value == BOND_MODE_ALB ||
 337              new_value == BOND_MODE_TLB) &&
 338             bond->params.arp_interval) {
 339                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 340                        bond->dev->name, bond_mode_tbl[new_value].modename);
 341                 ret = -EINVAL;
 342                 goto out;
 343         }
 344
 345         bond->params.mode = new_value;
 346         bond_set_mode_ops(bond, bond->params.mode);
 347         pr_info("%s: setting mode to %s (%d).\n",
 348                 bond->dev->name, bond_mode_tbl[new_value].modename,
 349                 new_value);
 350 out:
 351         return ret;
 352 }
 353 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 354                    bonding_show_mode, bonding_store_mode);
 355
 356 /*
 357  * Show and set the bonding transmit hash method.
 358  * The bond interface must be down to change the xmit hash policy.
 359  */
 360 static ssize_t bonding_show_xmit_hash(struct device *d,
 361                                       struct device_attribute *attr,
 362                                       char *buf)
 363 {
 364         struct bonding *bond = to_bond(d);
 365
 366         return sprintf(buf, "%s %d\n",
 367                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 368                        bond->params.xmit_policy);
 369 }
 370
 371 static ssize_t bonding_store_xmit_hash(struct device *d,
 372                                        struct device_attribute *attr,
 373                                        const char *buf, size_t count)
 374 {
 375         int new_value, ret = count;
 376         struct bonding *bond = to_bond(d);
 377
 378         if (bond->dev->flags & IFF_UP) {
 379                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 380                        bond->dev->name);
 381                 ret = -EPERM;
 382                 goto out;
 383         }
 384
 385         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 386         if (new_value < 0)  {
 387                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 388                        bond->dev->name,
 389                        (int)strlen(buf) - 1, buf);
 390                 ret = -EINVAL;
 391                 goto out;
 392         } else {
 393                 bond->params.xmit_policy = new_value;
 394                 bond_set_mode_ops(bond, bond->params.mode);
 395                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 396                         bond->dev->name,
 397                         xmit_hashtype_tbl[new_value].modename, new_value);
 398         }
 399 out:
 400         return ret;
 401 }
 402 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 403                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 404
 405 /*
 406  * Show and set arp_validate.
 407  */
 408 static ssize_t bonding_show_arp_validate(struct device *d,
 409                                          struct device_attribute *attr,
 410                                          char *buf)
 411 {
 412         struct bonding *bond = to_bond(d);
 413
 414         return sprintf(buf, "%s %d\n",
 415                        arp_validate_tbl[bond->params.arp_validate].modename,
 416                        bond->params.arp_validate);
 417 }
 418
 419 static ssize_t bonding_store_arp_validate(struct device *d,
 420                                           struct device_attribute *attr,
 421                                           const char *buf, size_t count)
 422 {
 423         int new_value;
 424         struct bonding *bond = to_bond(d);
 425
 426         new_value = bond_parse_parm(buf, arp_validate_tbl);
 427         if (new_value < 0) {
 428                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 429                        bond->dev->name, buf);
 430                 return -EINVAL;
 431         }
 432         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 433                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 434                        bond->dev->name);
 435                 return -EINVAL;
 436         }
 437         pr_info("%s: setting arp_validate to %s (%d).\n",
 438                 bond->dev->name, arp_validate_tbl[new_value].modename,
 439                 new_value);
 440
 441         bond->params.arp_validate = new_value;
 442
 443         return count;
 444 }
 445
 446 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 447                    bonding_store_arp_validate);
 448
 449 /*
 450  * Show and store fail_over_mac.  User only allowed to change the
 451  * value when there are no slaves.
 452  */
 453 static ssize_t bonding_show_fail_over_mac(struct device *d,
 454                                           struct device_attribute *attr,
 455                                           char *buf)
 456 {
 457         struct bonding *bond = to_bond(d);
 458
 459         return sprintf(buf, "%s %d\n",
 460                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 461                        bond->params.fail_over_mac);
 462 }
 463
 464 static ssize_t bonding_store_fail_over_mac(struct device *d,
 465                                            struct device_attribute *attr,
 466                                            const char *buf, size_t count)
 467 {
 468         int new_value;
 469         struct bonding *bond = to_bond(d);
 470
 471         if (bond->slave_cnt != 0) {
 472                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 473                        bond->dev->name);
 474                 return -EPERM;
 475         }
 476
 477         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 478         if (new_value < 0) {
 479                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 480                        bond->dev->name, buf);
 481                 return -EINVAL;
 482         }
 483
 484         bond->params.fail_over_mac = new_value;
 485         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 486                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 487                 new_value);
 488
 489         return count;
 490 }
 491
 492 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 493                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 494
 495 /*
 496  * Show and set the arp timer interval.  There are two tricky bits
 497  * here.  First, if ARP monitoring is activated, then we must disable
 498  * MII monitoring.  Second, if the ARP timer isn't running, we must
 499  * start it.
 500  */
 501 static ssize_t bonding_show_arp_interval(struct device *d,
 502                                          struct device_attribute *attr,
 503                                          char *buf)
 504 {
 505         struct bonding *bond = to_bond(d);
 506
 507         return sprintf(buf, "%d\n", bond->params.arp_interval);
 508 }
 509
 510 static ssize_t bonding_store_arp_interval(struct device *d,
 511                                           struct device_attribute *attr,
 512                                           const char *buf, size_t count)
 513 {
 514         int new_value, ret = count;
 515         struct bonding *bond = to_bond(d);
 516
 517         if (sscanf(buf, "%d", &new_value) != 1) {
 518                 pr_err("%s: no arp_interval value specified.\n",
 519                        bond->dev->name);
 520                 ret = -EINVAL;
 521                 goto out;
 522         }
 523         if (new_value < 0) {
 524                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 525                        bond->dev->name, new_value, INT_MAX);
 526                 ret = -EINVAL;
 527                 goto out;
 528         }
 529         if (bond->params.mode == BOND_MODE_ALB ||
 530             bond->params.mode == BOND_MODE_TLB) {
 531                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 532                         bond->dev->name, bond->dev->name);
 533                 ret = -EINVAL;
 534                 goto out;
 535         }
 536         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 537                 bond->dev->name, new_value);
 538         bond->params.arp_interval = new_value;
 539         if (bond->params.miimon) {
 540                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 541                         bond->dev->name, bond->dev->name);
 542                 bond->params.miimon = 0;
 543                 if (delayed_work_pending(&bond->mii_work)) {
 544                         cancel_delayed_work(&bond->mii_work);
 545                         flush_workqueue(bond->wq);
 546                 }
 547         }
 548         if (!bond->params.arp_targets[0]) {
 549                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 550                         bond->dev->name);
 551         }
 552         if (bond->dev->flags & IFF_UP) {
 553                 /* If the interface is up, we may need to fire off
 554                  * the ARP timer.  If the interface is down, the
 555                  * timer will get fired off when the open function
 556                  * is called.
 557                  */
 558                 if (!delayed_work_pending(&bond->arp_work)) {
 559                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 560                                 INIT_DELAYED_WORK(&bond->arp_work,
 561                                                   bond_activebackup_arp_mon);
 562                         else
 563                                 INIT_DELAYED_WORK(&bond->arp_work,
 564                                                   bond_loadbalance_arp_mon);
 565
 566                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 567                 }
 568         }
 569
 570 out:
 571         return ret;
 572 }
 573 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 574                    bonding_show_arp_interval, bonding_store_arp_interval);
 575
 576 /*
 577  * Show and set the arp targets.
 578  */
 579 static ssize_t bonding_show_arp_targets(struct device *d,
 580                                         struct device_attribute *attr,
 581                                         char *buf)
 582 {
 583         int i, res = 0;
 584         struct bonding *bond = to_bond(d);
 585
 586         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 587                 if (bond->params.arp_targets[i])
 588                         res += sprintf(buf + res, "%pI4 ",
 589                                        &bond->params.arp_targets[i]);
 590         }
 591         if (res)
 592                 buf[res-1] = '\n'; /* eat the leftover space */
 593         return res;
 594 }
 595
 596 static ssize_t bonding_store_arp_targets(struct device *d,
 597                                          struct device_attribute *attr,
 598                                          const char *buf, size_t count)
 599 {
 600         __be32 newtarget;
 601         int i = 0, done = 0, ret = count;
 602         struct bonding *bond = to_bond(d);
 603         __be32 *targets;
 604
 605         targets = bond->params.arp_targets;
 606         newtarget = in_aton(buf + 1);
 607         /* look for adds */
 608         if (buf[0] == '+') {
 609                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 610                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 611                                bond->dev->name, &newtarget);
 612                         ret = -EINVAL;
 613                         goto out;
 614                 }
 615                 /* look for an empty slot to put the target in, and check for dupes */
 616                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 617                         if (targets[i] == newtarget) { /* duplicate */
 618                                 pr_err("%s: ARP target %pI4 is already present\n",
 619                                        bond->dev->name, &newtarget);
 620                                 ret = -EINVAL;
 621                                 goto out;
 622                         }
 623                         if (targets[i] == 0) {
 624                                 pr_info("%s: adding ARP target %pI4.\n",
 625                                         bond->dev->name, &newtarget);
 626                                 done = 1;
 627                                 targets[i] = newtarget;
 628                         }
 629                 }
 630                 if (!done) {
 631                         pr_err("%s: ARP target table is full!\n",
 632                                bond->dev->name);
 633                         ret = -EINVAL;
 634                         goto out;
 635                 }
 636
 637         } else if (buf[0] == '-')       {
 638                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 639                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 640                                bond->dev->name, &newtarget);
 641                         ret = -EINVAL;
 642                         goto out;
 643                 }
 644
 645                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 646                         if (targets[i] == newtarget) {
 647                                 int j;
 648                                 pr_info("%s: removing ARP target %pI4.\n",
 649                                         bond->dev->name, &newtarget);
 650                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 651                                         targets[j] = targets[j+1];
 652
 653                                 targets[j] = 0;
 654                                 done = 1;
 655                         }
 656                 }
 657                 if (!done) {
 658                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 659                                 bond->dev->name, &newtarget);
 660                         ret = -EINVAL;
 661                         goto out;
 662                 }
 663         } else {
 664                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 665                        bond->dev->name);
 666                 ret = -EPERM;
 667                 goto out;
 668         }
 669
 670 out:
 671         return ret;
 672 }
 673 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 674
 675 /*
 676  * Show and set the up and down delays.  These must be multiples of the
 677  * MII monitoring value, and are stored internally as the multiplier.
 678  * Thus, we must translate to MS for the real world.
 679  */
 680 static ssize_t bonding_show_downdelay(struct device *d,
 681                                       struct device_attribute *attr,
 682                                       char *buf)
 683 {
 684         struct bonding *bond = to_bond(d);
 685
 686         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 687 }
 688
 689 static ssize_t bonding_store_downdelay(struct device *d,
 690                                        struct device_attribute *attr,
 691                                        const char *buf, size_t count)
 692 {
 693         int new_value, ret = count;
 694         struct bonding *bond = to_bond(d);
 695
 696         if (!(bond->params.miimon)) {
 697                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 698                        bond->dev->name);
 699                 ret = -EPERM;
 700                 goto out;
 701         }
 702
 703         if (sscanf(buf, "%d", &new_value) != 1) {
 704                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 705                 ret = -EINVAL;
 706                 goto out;
 707         }
 708         if (new_value < 0) {
 709                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 710                        bond->dev->name, new_value, 1, INT_MAX);
 711                 ret = -EINVAL;
 712                 goto out;
 713         } else {
 714                 if ((new_value % bond->params.miimon) != 0) {
 715                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 716                                    bond->dev->name, new_value,
 717                                    bond->params.miimon,
 718                                    (new_value / bond->params.miimon) *
 719                                    bond->params.miimon);
 720                 }
 721                 bond->params.downdelay = new_value / bond->params.miimon;
 722                 pr_info("%s: Setting down delay to %d.\n",
 723                         bond->dev->name,
 724                         bond->params.downdelay * bond->params.miimon);
 725
 726         }
 727
 728 out:
 729         return ret;
 730 }
 731 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 732                    bonding_show_downdelay, bonding_store_downdelay);
 733
 734 static ssize_t bonding_show_updelay(struct device *d,
 735                                     struct device_attribute *attr,
 736                                     char *buf)
 737 {
 738         struct bonding *bond = to_bond(d);
 739
 740         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 741
 742 }
 743
 744 static ssize_t bonding_store_updelay(struct device *d,
 745                                      struct device_attribute *attr,
 746                                      const char *buf, size_t count)
 747 {
 748         int new_value, ret = count;
 749         struct bonding *bond = to_bond(d);
 750
 751         if (!(bond->params.miimon)) {
 752                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 753                        bond->dev->name);
 754                 ret = -EPERM;
 755                 goto out;
 756         }
 757
 758         if (sscanf(buf, "%d", &new_value) != 1) {
 759                 pr_err("%s: no up delay value specified.\n",
 760                        bond->dev->name);
 761                 ret = -EINVAL;
 762                 goto out;
 763         }
 764         if (new_value < 0) {
 765                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 766                        bond->dev->name, new_value, 1, INT_MAX);
 767                 ret = -EINVAL;
 768                 goto out;
 769         } else {
 770                 if ((new_value % bond->params.miimon) != 0) {
 771                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 772                                    bond->dev->name, new_value,
 773                                    bond->params.miimon,
 774                                    (new_value / bond->params.miimon) *
 775                                    bond->params.miimon);
 776                 }
 777                 bond->params.updelay = new_value / bond->params.miimon;
 778                 pr_info("%s: Setting up delay to %d.\n",
 779                         bond->dev->name,
 780                         bond->params.updelay * bond->params.miimon);
 781         }
 782
 783 out:
 784         return ret;
 785 }
 786 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 787                    bonding_show_updelay, bonding_store_updelay);
 788
 789 /*
 790  * Show and set the LACP interval.  Interface must be down, and the mode
 791  * must be set to 802.3ad mode.
 792  */
 793 static ssize_t bonding_show_lacp(struct device *d,
 794                                  struct device_attribute *attr,
 795                                  char *buf)
 796 {
 797         struct bonding *bond = to_bond(d);
 798
 799         return sprintf(buf, "%s %d\n",
 800                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 801                 bond->params.lacp_fast);
 802 }
 803
 804 static ssize_t bonding_store_lacp(struct device *d,
 805                                   struct device_attribute *attr,
 806                                   const char *buf, size_t count)
 807 {
 808         int new_value, ret = count;
 809         struct bonding *bond = to_bond(d);
 810
 811         if (bond->dev->flags & IFF_UP) {
 812                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 813                        bond->dev->name);
 814                 ret = -EPERM;
 815                 goto out;
 816         }
 817
 818         if (bond->params.mode != BOND_MODE_8023AD) {
 819                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 820                        bond->dev->name);
 821                 ret = -EPERM;
 822                 goto out;
 823         }
 824
 825         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 826
 827         if ((new_value == 1) || (new_value == 0)) {
 828                 bond->params.lacp_fast = new_value;
 829                 bond_3ad_update_lacp_rate(bond);
 830                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 831                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 832                         new_value);
 833         } else {
 834                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 835                        bond->dev->name, (int)strlen(buf) - 1, buf);
 836                 ret = -EINVAL;
 837         }
 838 out:
 839         return ret;
 840 }
 841 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 842                    bonding_show_lacp, bonding_store_lacp);
 843
 844 static ssize_t bonding_show_min_links(struct device *d,
 845                                       struct device_attribute *attr,
 846                                       char *buf)
 847 {
 848         struct bonding *bond = to_bond(d);
 849
 850         return sprintf(buf, "%d\n", bond->params.min_links);
 851 }
 852
 853 static ssize_t bonding_store_min_links(struct device *d,
 854                                        struct device_attribute *attr,
 855                                        const char *buf, size_t count)
 856 {
 857         struct bonding *bond = to_bond(d);
 858         int ret;
 859         unsigned int new_value;
 860
 861         ret = kstrtouint(buf, 0, &new_value);
 862         if (ret < 0) {
 863                 pr_err("%s: Ignoring invalid min links value %s.\n",
 864                        bond->dev->name, buf);
 865                 return ret;
 866         }
 867
 868         pr_info("%s: Setting min links value to %u\n",
 869                 bond->dev->name, new_value);
 870         bond->params.min_links = new_value;
 871         return count;
 872 }
 873 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 874                    bonding_show_min_links, bonding_store_min_links);
 875
 876 static ssize_t bonding_show_ad_select(struct device *d,
 877                                       struct device_attribute *attr,
 878                                       char *buf)
 879 {
 880         struct bonding *bond = to_bond(d);
 881
 882         return sprintf(buf, "%s %d\n",
 883                 ad_select_tbl[bond->params.ad_select].modename,
 884                 bond->params.ad_select);
 885 }
 886
 887
 888 static ssize_t bonding_store_ad_select(struct device *d,
 889                                        struct device_attribute *attr,
 890                                        const char *buf, size_t count)
 891 {
 892         int new_value, ret = count;
 893         struct bonding *bond = to_bond(d);
 894
 895         if (bond->dev->flags & IFF_UP) {
 896                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 897                        bond->dev->name);
 898                 ret = -EPERM;
 899                 goto out;
 900         }
 901
 902         new_value = bond_parse_parm(buf, ad_select_tbl);
 903
 904         if (new_value != -1) {
 905                 bond->params.ad_select = new_value;
 906                 pr_info("%s: Setting ad_select to %s (%d).\n",
 907                         bond->dev->name, ad_select_tbl[new_value].modename,
 908                         new_value);
 909         } else {
 910                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 911                        bond->dev->name, (int)strlen(buf) - 1, buf);
 912                 ret = -EINVAL;
 913         }
 914 out:
 915         return ret;
 916 }
 917 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 918                    bonding_show_ad_select, bonding_store_ad_select);
 919
 920 /*
 921  * Show and set the number of peer notifications to send after a failover event.
 922  */
 923 static ssize_t bonding_show_num_peer_notif(struct device *d,
 924                                            struct device_attribute *attr,
 925                                            char *buf)
 926 {
 927         struct bonding *bond = to_bond(d);
 928         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 929 }
 930
 931 static ssize_t bonding_store_num_peer_notif(struct device *d,
 932                                             struct device_attribute *attr,
 933                                             const char *buf, size_t count)
 934 {
 935         struct bonding *bond = to_bond(d);
 936         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 937         return err ? err : count;
 938 }
 939 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 940                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 941 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 942                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 943
 944 /*
 945  * Show and set the MII monitor interval.  There are two tricky bits
 946  * here.  First, if MII monitoring is activated, then we must disable
 947  * ARP monitoring.  Second, if the timer isn't running, we must
 948  * start it.
 949  */
 950 static ssize_t bonding_show_miimon(struct device *d,
 951                                    struct device_attribute *attr,
 952                                    char *buf)
 953 {
 954         struct bonding *bond = to_bond(d);
 955
 956         return sprintf(buf, "%d\n", bond->params.miimon);
 957 }
 958
 959 static ssize_t bonding_store_miimon(struct device *d,
 960                                     struct device_attribute *attr,
 961                                     const char *buf, size_t count)
 962 {
 963         int new_value, ret = count;
 964         struct bonding *bond = to_bond(d);
 965
 966         if (sscanf(buf, "%d", &new_value) != 1) {
 967                 pr_err("%s: no miimon value specified.\n",
 968                        bond->dev->name);
 969                 ret = -EINVAL;
 970                 goto out;
 971         }
 972         if (new_value < 0) {
 973                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 974                        bond->dev->name, new_value, 1, INT_MAX);
 975                 ret = -EINVAL;
 976                 goto out;
 977         } else {
 978                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 979                         bond->dev->name, new_value);
 980                 bond->params.miimon = new_value;
 981                 if (bond->params.updelay)
 982                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 983                                 bond->dev->name,
 984                                 bond->params.updelay * bond->params.miimon);
 985                 if (bond->params.downdelay)
 986                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 987                                 bond->dev->name,
 988                                 bond->params.downdelay * bond->params.miimon);
 989                 if (bond->params.arp_interval) {
 990                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 991                                 bond->dev->name);
 992                         bond->params.arp_interval = 0;
 993                         if (bond->params.arp_validate) {
 994                                 bond->params.arp_validate =
 995                                         BOND_ARP_VALIDATE_NONE;
 996                         }
 997                         if (delayed_work_pending(&bond->arp_work)) {
 998                                 cancel_delayed_work(&bond->arp_work);
 999                                 flush_workqueue(bond->wq);
1000                         }
1001                 }
1002
1003                 if (bond->dev->flags & IFF_UP) {
1004                         /* If the interface is up, we may need to fire off
1005                          * the MII timer. If the interface is down, the
1006                          * timer will get fired off when the open function
1007                          * is called.
1008                          */
1009                         if (!delayed_work_pending(&bond->mii_work)) {
1010                                 INIT_DELAYED_WORK(&bond->mii_work,
1011                                                   bond_mii_monitor);
1012                                 queue_delayed_work(bond->wq,
1013                                                    &bond->mii_work, 0);
1014                         }
1015                 }
1016         }
1017 out:
1018         return ret;
1019 }
1020 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1021                    bonding_show_miimon, bonding_store_miimon);
1022
1023 /*
1024  * Show and set the primary slave.  The store function is much
1025  * simpler than bonding_store_slaves function because it only needs to
1026  * handle one interface name.
1027  * The bond must be a mode that supports a primary for this be
1028  * set.
1029  */
1030 static ssize_t bonding_show_primary(struct device *d,
1031                                     struct device_attribute *attr,
1032                                     char *buf)
1033 {
1034         int count = 0;
1035         struct bonding *bond = to_bond(d);
1036
1037         if (bond->primary_slave)
1038                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1039
1040         return count;
1041 }
1042
1043 static ssize_t bonding_store_primary(struct device *d,
1044                                      struct device_attribute *attr,
1045                                      const char *buf, size_t count)
1046 {
1047         int i;
1048         struct slave *slave;
1049         struct bonding *bond = to_bond(d);
1050         char ifname[IFNAMSIZ];
1051
1052         if (!rtnl_trylock())
1053                 return restart_syscall();
1054         block_netpoll_tx();
1055         read_lock(&bond->lock);
1056         write_lock_bh(&bond->curr_slave_lock);
1057
1058         if (!USES_PRIMARY(bond->params.mode)) {
1059                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1060                         bond->dev->name, bond->dev->name, bond->params.mode);
1061                 goto out;
1062         }
1063
1064         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1065
1066         /* check to see if we are clearing primary */
1067         if (!strlen(ifname) || buf[0] == '\n') {
1068                 pr_info("%s: Setting primary slave to None.\n",
1069                         bond->dev->name);
1070                 bond->primary_slave = NULL;
1071                 bond_select_active_slave(bond);
1072                 goto out;
1073         }
1074
1075         bond_for_each_slave(bond, slave, i) {
1076                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1077                         pr_info("%s: Setting %s as primary slave.\n",
1078                                 bond->dev->name, slave->dev->name);
1079                         bond->primary_slave = slave;
1080                         strcpy(bond->params.primary, slave->dev->name);
1081                         bond_select_active_slave(bond);
1082                         goto out;
1083                 }
1084         }
1085
1086         pr_info("%s: Unable to set %.*s as primary slave.\n",
1087                 bond->dev->name, (int)strlen(buf) - 1, buf);
1088 out:
1089         write_unlock_bh(&bond->curr_slave_lock);
1090         read_unlock(&bond->lock);
1091         unblock_netpoll_tx();
1092         rtnl_unlock();
1093
1094         return count;
1095 }
1096 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1097                    bonding_show_primary, bonding_store_primary);
1098
1099 /*
1100  * Show and set the primary_reselect flag.
1101  */
1102 static ssize_t bonding_show_primary_reselect(struct device *d,
1103                                              struct device_attribute *attr,
1104                                              char *buf)
1105 {
1106         struct bonding *bond = to_bond(d);
1107
1108         return sprintf(buf, "%s %d\n",
1109                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1110                        bond->params.primary_reselect);
1111 }
1112
1113 static ssize_t bonding_store_primary_reselect(struct device *d,
1114                                               struct device_attribute *attr,
1115                                               const char *buf, size_t count)
1116 {
1117         int new_value, ret = count;
1118         struct bonding *bond = to_bond(d);
1119
1120         if (!rtnl_trylock())
1121                 return restart_syscall();
1122
1123         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1124         if (new_value < 0)  {
1125                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1126                        bond->dev->name,
1127                        (int) strlen(buf) - 1, buf);
1128                 ret = -EINVAL;
1129                 goto out;
1130         }
1131
1132         bond->params.primary_reselect = new_value;
1133         pr_info("%s: setting primary_reselect to %s (%d).\n",
1134                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1135                 new_value);
1136
1137         block_netpoll_tx();
1138         read_lock(&bond->lock);
1139         write_lock_bh(&bond->curr_slave_lock);
1140         bond_select_active_slave(bond);
1141         write_unlock_bh(&bond->curr_slave_lock);
1142         read_unlock(&bond->lock);
1143         unblock_netpoll_tx();
1144 out:
1145         rtnl_unlock();
1146         return ret;
1147 }
1148 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1149                    bonding_show_primary_reselect,
1150                    bonding_store_primary_reselect);
1151
1152 /*
1153  * Show and set the use_carrier flag.
1154  */
1155 static ssize_t bonding_show_carrier(struct device *d,
1156                                     struct device_attribute *attr,
1157                                     char *buf)
1158 {
1159         struct bonding *bond = to_bond(d);
1160
1161         return sprintf(buf, "%d\n", bond->params.use_carrier);
1162 }
1163
1164 static ssize_t bonding_store_carrier(struct device *d,
1165                                      struct device_attribute *attr,
1166                                      const char *buf, size_t count)
1167 {
1168         int new_value, ret = count;
1169         struct bonding *bond = to_bond(d);
1170
1171
1172         if (sscanf(buf, "%d", &new_value) != 1) {
1173                 pr_err("%s: no use_carrier value specified.\n",
1174                        bond->dev->name);
1175                 ret = -EINVAL;
1176                 goto out;
1177         }
1178         if ((new_value == 0) || (new_value == 1)) {
1179                 bond->params.use_carrier = new_value;
1180                 pr_info("%s: Setting use_carrier to %d.\n",
1181                         bond->dev->name, new_value);
1182         } else {
1183                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1184                         bond->dev->name, new_value);
1185         }
1186 out:
1187         return ret;
1188 }
1189 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1190                    bonding_show_carrier, bonding_store_carrier);
1191
1192
1193 /*
1194  * Show and set currently active_slave.
1195  */
1196 static ssize_t bonding_show_active_slave(struct device *d,
1197                                          struct device_attribute *attr,
1198                                          char *buf)
1199 {
1200         struct slave *curr;
1201         struct bonding *bond = to_bond(d);
1202         int count = 0;
1203
1204         read_lock(&bond->curr_slave_lock);
1205         curr = bond->curr_active_slave;
1206         read_unlock(&bond->curr_slave_lock);
1207
1208         if (USES_PRIMARY(bond->params.mode) && curr)
1209                 count = sprintf(buf, "%s\n", curr->dev->name);
1210         return count;
1211 }
1212
1213 static ssize_t bonding_store_active_slave(struct device *d,
1214                                           struct device_attribute *attr,
1215                                           const char *buf, size_t count)
1216 {
1217         int i;
1218         struct slave *slave;
1219         struct slave *old_active = NULL;
1220         struct slave *new_active = NULL;
1221         struct bonding *bond = to_bond(d);
1222         char ifname[IFNAMSIZ];
1223
1224         if (!rtnl_trylock())
1225                 return restart_syscall();
1226
1227         block_netpoll_tx();
1228         read_lock(&bond->lock);
1229         write_lock_bh(&bond->curr_slave_lock);
1230
1231         if (!USES_PRIMARY(bond->params.mode)) {
1232                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1233                         bond->dev->name, bond->dev->name, bond->params.mode);
1234                 goto out;
1235         }
1236
1237         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1238
1239         /* check to see if we are clearing active */
1240         if (!strlen(ifname) || buf[0] == '\n') {
1241                 pr_info("%s: Clearing current active slave.\n",
1242                         bond->dev->name);
1243                 bond->curr_active_slave = NULL;
1244                 bond_select_active_slave(bond);
1245                 goto out;
1246         }
1247
1248         bond_for_each_slave(bond, slave, i) {
1249                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1250                         old_active = bond->curr_active_slave;
1251                         new_active = slave;
1252                         if (new_active == old_active) {
1253                                 /* do nothing */
1254                                 pr_info("%s: %s is already the current"
1255                                         " active slave.\n",
1256                                         bond->dev->name,
1257                                         slave->dev->name);
1258                                 goto out;
1259                         }
1260                         else {
1261                                 if ((new_active) &&
1262                                     (old_active) &&
1263                                     (new_active->link == BOND_LINK_UP) &&
1264                                     IS_UP(new_active->dev)) {
1265                                         pr_info("%s: Setting %s as active"
1266                                                 " slave.\n",
1267                                                 bond->dev->name,
1268                                                 slave->dev->name);
1269                                         bond_change_active_slave(bond,
1270                                                                  new_active);
1271                                 }
1272                                 else {
1273                                         pr_info("%s: Could not set %s as"
1274                                                 " active slave; either %s is"
1275                                                 " down or the link is down.\n",
1276                                                 bond->dev->name,
1277                                                 slave->dev->name,
1278                                                 slave->dev->name);
1279                                 }
1280                                 goto out;
1281                         }
1282                 }
1283         }
1284
1285         pr_info("%s: Unable to set %.*s as active slave.\n",
1286                 bond->dev->name, (int)strlen(buf) - 1, buf);
1287  out:
1288         write_unlock_bh(&bond->curr_slave_lock);
1289         read_unlock(&bond->lock);
1290         unblock_netpoll_tx();
1291
1292         rtnl_unlock();
1293
1294         return count;
1295
1296 }
1297 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1298                    bonding_show_active_slave, bonding_store_active_slave);
1299
1300
1301 /*
1302  * Show link status of the bond interface.
1303  */
1304 static ssize_t bonding_show_mii_status(struct device *d,
1305                                        struct device_attribute *attr,
1306                                        char *buf)
1307 {
1308         struct slave *curr;
1309         struct bonding *bond = to_bond(d);
1310
1311         read_lock(&bond->curr_slave_lock);
1312         curr = bond->curr_active_slave;
1313         read_unlock(&bond->curr_slave_lock);
1314
1315         return sprintf(buf, "%s\n", curr ? "up" : "down");
1316 }
1317 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1318
1319
1320 /*
1321  * Show current 802.3ad aggregator ID.
1322  */
1323 static ssize_t bonding_show_ad_aggregator(struct device *d,
1324                                           struct device_attribute *attr,
1325                                           char *buf)
1326 {
1327         int count = 0;
1328         struct bonding *bond = to_bond(d);
1329
1330         if (bond->params.mode == BOND_MODE_8023AD) {
1331                 struct ad_info ad_info;
1332                 count = sprintf(buf, "%d\n",
1333                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1334                                 ?  0 : ad_info.aggregator_id);
1335         }
1336
1337         return count;
1338 }
1339 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1340
1341
1342 /*
1343  * Show number of active 802.3ad ports.
1344  */
1345 static ssize_t bonding_show_ad_num_ports(struct device *d,
1346                                          struct device_attribute *attr,
1347                                          char *buf)
1348 {
1349         int count = 0;
1350         struct bonding *bond = to_bond(d);
1351
1352         if (bond->params.mode == BOND_MODE_8023AD) {
1353                 struct ad_info ad_info;
1354                 count = sprintf(buf, "%d\n",
1355                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1356                                 ?  0 : ad_info.ports);
1357         }
1358
1359         return count;
1360 }
1361 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1362
1363
1364 /*
1365  * Show current 802.3ad actor key.
1366  */
1367 static ssize_t bonding_show_ad_actor_key(struct device *d,
1368                                          struct device_attribute *attr,
1369                                          char *buf)
1370 {
1371         int count = 0;
1372         struct bonding *bond = to_bond(d);
1373
1374         if (bond->params.mode == BOND_MODE_8023AD) {
1375                 struct ad_info ad_info;
1376                 count = sprintf(buf, "%d\n",
1377                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1378                                 ?  0 : ad_info.actor_key);
1379         }
1380
1381         return count;
1382 }
1383 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1384
1385
1386 /*
1387  * Show current 802.3ad partner key.
1388  */
1389 static ssize_t bonding_show_ad_partner_key(struct device *d,
1390                                            struct device_attribute *attr,
1391                                            char *buf)
1392 {
1393         int count = 0;
1394         struct bonding *bond = to_bond(d);
1395
1396         if (bond->params.mode == BOND_MODE_8023AD) {
1397                 struct ad_info ad_info;
1398                 count = sprintf(buf, "%d\n",
1399                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1400                                 ?  0 : ad_info.partner_key);
1401         }
1402
1403         return count;
1404 }
1405 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1406
1407
1408 /*
1409  * Show current 802.3ad partner mac.
1410  */
1411 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1412                                            struct device_attribute *attr,
1413                                            char *buf)
1414 {
1415         int count = 0;
1416         struct bonding *bond = to_bond(d);
1417
1418         if (bond->params.mode == BOND_MODE_8023AD) {
1419                 struct ad_info ad_info;
1420                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1421                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1422         }
1423
1424         return count;
1425 }
1426 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1427
1428 /*
1429  * Show the queue_ids of the slaves in the current bond.
1430  */
1431 static ssize_t bonding_show_queue_id(struct device *d,
1432                                      struct device_attribute *attr,
1433                                      char *buf)
1434 {
1435         struct slave *slave;
1436         int i, res = 0;
1437         struct bonding *bond = to_bond(d);
1438
1439         if (!rtnl_trylock())
1440                 return restart_syscall();
1441
1442         read_lock(&bond->lock);
1443         bond_for_each_slave(bond, slave, i) {
1444                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1445                         /* not enough space for another interface_name:queue_id pair */
1446                         if ((PAGE_SIZE - res) > 10)
1447                                 res = PAGE_SIZE - 10;
1448                         res += sprintf(buf + res, "++more++ ");
1449                         break;
1450                 }
1451                 res += sprintf(buf + res, "%s:%d ",
1452                                slave->dev->name, slave->queue_id);
1453         }
1454         read_unlock(&bond->lock);
1455         if (res)
1456                 buf[res-1] = '\n'; /* eat the leftover space */
1457         rtnl_unlock();
1458         return res;
1459 }
1460
1461 /*
1462  * Set the queue_ids of the  slaves in the current bond.  The bond
1463  * interface must be enslaved for this to work.
1464  */
1465 static ssize_t bonding_store_queue_id(struct device *d,
1466                                       struct device_attribute *attr,
1467                                       const char *buffer, size_t count)
1468 {
1469         struct slave *slave, *update_slave;
1470         struct bonding *bond = to_bond(d);
1471         u16 qid;
1472         int i, ret = count;
1473         char *delim;
1474         struct net_device *sdev = NULL;
1475
1476         if (!rtnl_trylock())
1477                 return restart_syscall();
1478
1479         /* delim will point to queue id if successful */
1480         delim = strchr(buffer, ':');
1481         if (!delim)
1482                 goto err_no_cmd;
1483
1484         /*
1485          * Terminate string that points to device name and bump it
1486          * up one, so we can read the queue id there.
1487          */
1488         *delim = '\0';
1489         if (sscanf(++delim, "%hd\n", &qid) != 1)
1490                 goto err_no_cmd;
1491
1492         /* Check buffer length, valid ifname and queue id */
1493         if (strlen(buffer) > IFNAMSIZ ||
1494             !dev_valid_name(buffer) ||
1495             qid > bond->params.tx_queues)
1496                 goto err_no_cmd;
1497
1498         /* Get the pointer to that interface if it exists */
1499         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1500         if (!sdev)
1501                 goto err_no_cmd;
1502
1503         read_lock(&bond->lock);
1504
1505         /* Search for thes slave and check for duplicate qids */
1506         update_slave = NULL;
1507         bond_for_each_slave(bond, slave, i) {
1508                 if (sdev == slave->dev)
1509                         /*
1510                          * We don't need to check the matching
1511                          * slave for dups, since we're overwriting it
1512                          */
1513                         update_slave = slave;
1514                 else if (qid && qid == slave->queue_id) {
1515                         goto err_no_cmd_unlock;
1516                 }
1517         }
1518
1519         if (!update_slave)
1520                 goto err_no_cmd_unlock;
1521
1522         /* Actually set the qids for the slave */
1523         update_slave->queue_id = qid;
1524
1525         read_unlock(&bond->lock);
1526 out:
1527         rtnl_unlock();
1528         return ret;
1529
1530 err_no_cmd_unlock:
1531         read_unlock(&bond->lock);
1532 err_no_cmd:
1533         pr_info("invalid input for queue_id set for %s.\n",
1534                 bond->dev->name);
1535         ret = -EPERM;
1536         goto out;
1537 }
1538
1539 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1540                    bonding_store_queue_id);
1541
1542
1543 /*
1544  * Show and set the all_slaves_active flag.
1545  */
1546 static ssize_t bonding_show_slaves_active(struct device *d,
1547                                           struct device_attribute *attr,
1548                                           char *buf)
1549 {
1550         struct bonding *bond = to_bond(d);
1551
1552         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1553 }
1554
1555 static ssize_t bonding_store_slaves_active(struct device *d,
1556                                            struct device_attribute *attr,
1557                                            const char *buf, size_t count)
1558 {
1559         int i, new_value, ret = count;
1560         struct bonding *bond = to_bond(d);
1561         struct slave *slave;
1562
1563         if (sscanf(buf, "%d", &new_value) != 1) {
1564                 pr_err("%s: no all_slaves_active value specified.\n",
1565                        bond->dev->name);
1566                 ret = -EINVAL;
1567                 goto out;
1568         }
1569
1570         if (new_value == bond->params.all_slaves_active)
1571                 goto out;
1572
1573         if ((new_value == 0) || (new_value == 1)) {
1574                 bond->params.all_slaves_active = new_value;
1575         } else {
1576                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1577                         bond->dev->name, new_value);
1578                 ret = -EINVAL;
1579                 goto out;
1580         }
1581
1582         bond_for_each_slave(bond, slave, i) {
1583                 if (!bond_is_active_slave(slave)) {
1584                         if (new_value)
1585                                 slave->inactive = 0;
1586                         else
1587                                 slave->inactive = 1;
1588                 }
1589         }
1590 out:
1591         return ret;
1592 }
1593 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1594                    bonding_show_slaves_active, bonding_store_slaves_active);
1595
1596 /*
1597  * Show and set the number of IGMP membership reports to send on link failure
1598  */
1599 static ssize_t bonding_show_resend_igmp(struct device *d,
1600                                         struct device_attribute *attr,
1601                                         char *buf)
1602 {
1603         struct bonding *bond = to_bond(d);
1604
1605         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1606 }
1607
1608 static ssize_t bonding_store_resend_igmp(struct device *d,
1609                                          struct device_attribute *attr,
1610                                          const char *buf, size_t count)
1611 {
1612         int new_value, ret = count;
1613         struct bonding *bond = to_bond(d);
1614
1615         if (sscanf(buf, "%d", &new_value) != 1) {
1616                 pr_err("%s: no resend_igmp value specified.\n",
1617                        bond->dev->name);
1618                 ret = -EINVAL;
1619                 goto out;
1620         }
1621
1622         if (new_value < 0 || new_value > 255) {
1623                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1624                        bond->dev->name, new_value);
1625                 ret = -EINVAL;
1626                 goto out;
1627         }
1628
1629         pr_info("%s: Setting resend_igmp to %d.\n",
1630                 bond->dev->name, new_value);
1631         bond->params.resend_igmp = new_value;
1632 out:
1633         return ret;
1634 }
1635
1636 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1637                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1638
1639 static struct attribute *per_bond_attrs[] = {
1640         &dev_attr_slaves.attr,
1641         &dev_attr_mode.attr,
1642         &dev_attr_fail_over_mac.attr,
1643         &dev_attr_arp_validate.attr,
1644         &dev_attr_arp_interval.attr,
1645         &dev_attr_arp_ip_target.attr,
1646         &dev_attr_downdelay.attr,
1647         &dev_attr_updelay.attr,
1648         &dev_attr_lacp_rate.attr,
1649         &dev_attr_ad_select.attr,
1650         &dev_attr_xmit_hash_policy.attr,
1651         &dev_attr_num_grat_arp.attr,
1652         &dev_attr_num_unsol_na.attr,
1653         &dev_attr_miimon.attr,
1654         &dev_attr_primary.attr,
1655         &dev_attr_primary_reselect.attr,
1656         &dev_attr_use_carrier.attr,
1657         &dev_attr_active_slave.attr,
1658         &dev_attr_mii_status.attr,
1659         &dev_attr_ad_aggregator.attr,
1660         &dev_attr_ad_num_ports.attr,
1661         &dev_attr_ad_actor_key.attr,
1662         &dev_attr_ad_partner_key.attr,
1663         &dev_attr_ad_partner_mac.attr,
1664         &dev_attr_queue_id.attr,
1665         &dev_attr_all_slaves_active.attr,
1666         &dev_attr_resend_igmp.attr,
1667         &dev_attr_min_links.attr,
1668         NULL,
1669 };
1670
1671 static struct attribute_group bonding_group = {
1672         .name = "bonding",
1673         .attrs = per_bond_attrs,
1674 };
1675
1676 /*
1677  * Initialize sysfs.  This sets up the bonding_masters file in
1678  * /sys/class/net.
1679  */
1680 int bond_create_sysfs(struct bond_net *bn)
1681 {
1682         int ret;
1683
1684         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1685         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1686
1687         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1688         /*
1689          * Permit multiple loads of the module by ignoring failures to
1690          * create the bonding_masters sysfs file.  Bonding devices
1691          * created by second or subsequent loads of the module will
1692          * not be listed in, or controllable by, bonding_masters, but
1693          * will have the usual "bonding" sysfs directory.
1694          *
1695          * This is done to preserve backwards compatibility for
1696          * initscripts/sysconfig, which load bonding multiple times to
1697          * configure multiple bonding devices.
1698          */
1699         if (ret == -EEXIST) {
1700                 /* Is someone being kinky and naming a device bonding_master? */
1701                 if (__dev_get_by_name(bn->net,
1702                                       class_attr_bonding_masters.attr.name))
1703                         pr_err("network device named %s already exists in sysfs",
1704                                class_attr_bonding_masters.attr.name);
1705                 ret = 0;
1706         }
1707
1708         return ret;
1709
1710 }
1711
1712 /*
1713  * Remove /sys/class/net/bonding_masters.
1714  */
1715 void bond_destroy_sysfs(struct bond_net *bn)
1716 {
1717         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1718 }
1719
1720 /*
1721  * Initialize sysfs for each bond.  This sets up and registers
1722  * the 'bondctl' directory for each individual bond under /sys/class/net.
1723  */
1724 void bond_prepare_sysfs_group(struct bonding *bond)
1725 {
1726         bond->dev->sysfs_groups[0] = &bonding_group;
1727 }
1728