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
 188         /* free the master link created earlier in case of error */
 189         if (ret)
 190                 sysfs_remove_link(&(slave->dev.kobj), "master");
 191
 192         return ret;
 193
 194 }
 195
 196 void bond_destroy_slave_symlinks(struct net_device *master,
 197                                  struct net_device *slave)
 198 {
 199         char linkname[IFNAMSIZ+7];
 200
 201         sysfs_remove_link(&(slave->dev.kobj), "master");
 202         sprintf(linkname, "slave_%s", slave->name);
 203         sysfs_remove_link(&(master->dev.kobj), linkname);
 204 }
 205
 206
 207 /*
 208  * Show the slaves in the current bond.
 209  */
 210 static ssize_t bonding_show_slaves(struct device *d,
 211                                    struct device_attribute *attr, char *buf)
 212 {
 213         struct slave *slave;
 214         int i, res = 0;
 215         struct bonding *bond = to_bond(d);
 216
 217         read_lock(&bond->lock);
 218         bond_for_each_slave(bond, slave, i) {
 219                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 220                         /* not enough space for another interface name */
 221                         if ((PAGE_SIZE - res) > 10)
 222                                 res = PAGE_SIZE - 10;
 223                         res += sprintf(buf + res, "++more++ ");
 224                         break;
 225                 }
 226                 res += sprintf(buf + res, "%s ", slave->dev->name);
 227         }
 228         read_unlock(&bond->lock);
 229         if (res)
 230                 buf[res-1] = '\n'; /* eat the leftover space */
 231         return res;
 232 }
 233
 234 /*
 235  * Set the slaves in the current bond.  The bond interface must be
 236  * up for this to succeed.
 237  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 238  * All hard work should be done there.
 239  */
 240 static ssize_t bonding_store_slaves(struct device *d,
 241                                     struct device_attribute *attr,
 242                                     const char *buffer, size_t count)
 243 {
 244         char command[IFNAMSIZ + 1] = { 0, };
 245         char *ifname;
 246         int res, ret = count;
 247         struct net_device *dev;
 248         struct bonding *bond = to_bond(d);
 249
 250         if (!rtnl_trylock())
 251                 return restart_syscall();
 252
 253         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 254         ifname = command + 1;
 255         if ((strlen(command) <= 1) ||
 256             !dev_valid_name(ifname))
 257                 goto err_no_cmd;
 258
 259         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 260         if (!dev) {
 261                 pr_info("%s: Interface %s does not exist!\n",
 262                         bond->dev->name, ifname);
 263                 ret = -ENODEV;
 264                 goto out;
 265         }
 266
 267         switch (command[0]) {
 268         case '+':
 269                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 270                 res = bond_enslave(bond->dev, dev);
 271                 break;
 272
 273         case '-':
 274                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 275                 res = bond_release(bond->dev, dev);
 276                 break;
 277
 278         default:
 279                 goto err_no_cmd;
 280         }
 281
 282         if (res)
 283                 ret = res;
 284         goto out;
 285
 286 err_no_cmd:
 287         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 288                bond->dev->name);
 289         ret = -EPERM;
 290
 291 out:
 292         rtnl_unlock();
 293         return ret;
 294 }
 295
 296 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 297                    bonding_store_slaves);
 298
 299 /*
 300  * Show and set the bonding mode.  The bond interface must be down to
 301  * change the mode.
 302  */
 303 static ssize_t bonding_show_mode(struct device *d,
 304                                  struct device_attribute *attr, char *buf)
 305 {
 306         struct bonding *bond = to_bond(d);
 307
 308         return sprintf(buf, "%s %d\n",
 309                         bond_mode_tbl[bond->params.mode].modename,
 310                         bond->params.mode);
 311 }
 312
 313 static ssize_t bonding_store_mode(struct device *d,
 314                                   struct device_attribute *attr,
 315                                   const char *buf, size_t count)
 316 {
 317         int new_value, ret = count;
 318         struct bonding *bond = to_bond(d);
 319
 320         if (bond->dev->flags & IFF_UP) {
 321                 pr_err("unable to update mode of %s because interface is up.\n",
 322                        bond->dev->name);
 323                 ret = -EPERM;
 324                 goto out;
 325         }
 326
 327         if (bond->slave_cnt > 0) {
 328                 pr_err("unable to update mode of %s because it has slaves.\n",
 329                         bond->dev->name);
 330                 ret = -EPERM;
 331                 goto out;
 332         }
 333
 334         new_value = bond_parse_parm(buf, bond_mode_tbl);
 335         if (new_value < 0)  {
 336                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 337                        bond->dev->name, (int)strlen(buf) - 1, buf);
 338                 ret = -EINVAL;
 339                 goto out;
 340         }
 341         if ((new_value == BOND_MODE_ALB ||
 342              new_value == BOND_MODE_TLB) &&
 343             bond->params.arp_interval) {
 344                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 345                        bond->dev->name, bond_mode_tbl[new_value].modename);
 346                 ret = -EINVAL;
 347                 goto out;
 348         }
 349
 350         bond->params.mode = new_value;
 351         bond_set_mode_ops(bond, bond->params.mode);
 352         pr_info("%s: setting mode to %s (%d).\n",
 353                 bond->dev->name, bond_mode_tbl[new_value].modename,
 354                 new_value);
 355 out:
 356         return ret;
 357 }
 358 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 359                    bonding_show_mode, bonding_store_mode);
 360
 361 /*
 362  * Show and set the bonding transmit hash method.
 363  * The bond interface must be down to change the xmit hash policy.
 364  */
 365 static ssize_t bonding_show_xmit_hash(struct device *d,
 366                                       struct device_attribute *attr,
 367                                       char *buf)
 368 {
 369         struct bonding *bond = to_bond(d);
 370
 371         return sprintf(buf, "%s %d\n",
 372                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 373                        bond->params.xmit_policy);
 374 }
 375
 376 static ssize_t bonding_store_xmit_hash(struct device *d,
 377                                        struct device_attribute *attr,
 378                                        const char *buf, size_t count)
 379 {
 380         int new_value, ret = count;
 381         struct bonding *bond = to_bond(d);
 382
 383         if (bond->dev->flags & IFF_UP) {
 384                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 385                        bond->dev->name);
 386                 ret = -EPERM;
 387                 goto out;
 388         }
 389
 390         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 391         if (new_value < 0)  {
 392                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 393                        bond->dev->name,
 394                        (int)strlen(buf) - 1, buf);
 395                 ret = -EINVAL;
 396                 goto out;
 397         } else {
 398                 bond->params.xmit_policy = new_value;
 399                 bond_set_mode_ops(bond, bond->params.mode);
 400                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 401                         bond->dev->name,
 402                         xmit_hashtype_tbl[new_value].modename, new_value);
 403         }
 404 out:
 405         return ret;
 406 }
 407 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 408                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 409
 410 /*
 411  * Show and set arp_validate.
 412  */
 413 static ssize_t bonding_show_arp_validate(struct device *d,
 414                                          struct device_attribute *attr,
 415                                          char *buf)
 416 {
 417         struct bonding *bond = to_bond(d);
 418
 419         return sprintf(buf, "%s %d\n",
 420                        arp_validate_tbl[bond->params.arp_validate].modename,
 421                        bond->params.arp_validate);
 422 }
 423
 424 static ssize_t bonding_store_arp_validate(struct device *d,
 425                                           struct device_attribute *attr,
 426                                           const char *buf, size_t count)
 427 {
 428         int new_value;
 429         struct bonding *bond = to_bond(d);
 430
 431         new_value = bond_parse_parm(buf, arp_validate_tbl);
 432         if (new_value < 0) {
 433                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 434                        bond->dev->name, buf);
 435                 return -EINVAL;
 436         }
 437         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 438                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 439                        bond->dev->name);
 440                 return -EINVAL;
 441         }
 442         pr_info("%s: setting arp_validate to %s (%d).\n",
 443                 bond->dev->name, arp_validate_tbl[new_value].modename,
 444                 new_value);
 445
 446         bond->params.arp_validate = new_value;
 447
 448         return count;
 449 }
 450
 451 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 452                    bonding_store_arp_validate);
 453
 454 /*
 455  * Show and store fail_over_mac.  User only allowed to change the
 456  * value when there are no slaves.
 457  */
 458 static ssize_t bonding_show_fail_over_mac(struct device *d,
 459                                           struct device_attribute *attr,
 460                                           char *buf)
 461 {
 462         struct bonding *bond = to_bond(d);
 463
 464         return sprintf(buf, "%s %d\n",
 465                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 466                        bond->params.fail_over_mac);
 467 }
 468
 469 static ssize_t bonding_store_fail_over_mac(struct device *d,
 470                                            struct device_attribute *attr,
 471                                            const char *buf, size_t count)
 472 {
 473         int new_value;
 474         struct bonding *bond = to_bond(d);
 475
 476         if (bond->slave_cnt != 0) {
 477                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 478                        bond->dev->name);
 479                 return -EPERM;
 480         }
 481
 482         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 483         if (new_value < 0) {
 484                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 485                        bond->dev->name, buf);
 486                 return -EINVAL;
 487         }
 488
 489         bond->params.fail_over_mac = new_value;
 490         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 491                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 492                 new_value);
 493
 494         return count;
 495 }
 496
 497 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 498                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 499
 500 /*
 501  * Show and set the arp timer interval.  There are two tricky bits
 502  * here.  First, if ARP monitoring is activated, then we must disable
 503  * MII monitoring.  Second, if the ARP timer isn't running, we must
 504  * start it.
 505  */
 506 static ssize_t bonding_show_arp_interval(struct device *d,
 507                                          struct device_attribute *attr,
 508                                          char *buf)
 509 {
 510         struct bonding *bond = to_bond(d);
 511
 512         return sprintf(buf, "%d\n", bond->params.arp_interval);
 513 }
 514
 515 static ssize_t bonding_store_arp_interval(struct device *d,
 516                                           struct device_attribute *attr,
 517                                           const char *buf, size_t count)
 518 {
 519         int new_value, ret = count;
 520         struct bonding *bond = to_bond(d);
 521
 522         if (!rtnl_trylock())
 523                 return restart_syscall();
 524         if (sscanf(buf, "%d", &new_value) != 1) {
 525                 pr_err("%s: no arp_interval value specified.\n",
 526                        bond->dev->name);
 527                 ret = -EINVAL;
 528                 goto out;
 529         }
 530         if (new_value < 0) {
 531                 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
 532                        bond->dev->name, new_value, INT_MAX);
 533                 ret = -EINVAL;
 534                 goto out;
 535         }
 536         if (bond->params.mode == BOND_MODE_ALB ||
 537             bond->params.mode == BOND_MODE_TLB ||
 538             bond->params.mode == BOND_MODE_8023AD) {
 539                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n",
 540                         bond->dev->name, bond->dev->name);
 541                 ret = -EINVAL;
 542                 goto out;
 543         }
 544         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 545                 bond->dev->name, new_value);
 546         bond->params.arp_interval = new_value;
 547         if (new_value) {
 548                 if (bond->params.miimon) {
 549                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 550                                 bond->dev->name, bond->dev->name);
 551                         bond->params.miimon = 0;
 552                 }
 553                 if (!bond->params.arp_targets[0])
 554                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 555                                 bond->dev->name);
 556         }
 557         if (bond->dev->flags & IFF_UP) {
 558                 /* If the interface is up, we may need to fire off
 559                  * the ARP timer.  If the interface is down, the
 560                  * timer will get fired off when the open function
 561                  * is called.
 562                  */
 563                 if (!new_value) {
 564                         cancel_delayed_work_sync(&bond->arp_work);
 565                 } else {
 566                         cancel_delayed_work_sync(&bond->mii_work);
 567                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 568                 }
 569         }
 570 out:
 571         rtnl_unlock();
 572         return ret;
 573 }
 574 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 575                    bonding_show_arp_interval, bonding_store_arp_interval);
 576
 577 /*
 578  * Show and set the arp targets.
 579  */
 580 static ssize_t bonding_show_arp_targets(struct device *d,
 581                                         struct device_attribute *attr,
 582                                         char *buf)
 583 {
 584         int i, res = 0;
 585         struct bonding *bond = to_bond(d);
 586
 587         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 588                 if (bond->params.arp_targets[i])
 589                         res += sprintf(buf + res, "%pI4 ",
 590                                        &bond->params.arp_targets[i]);
 591         }
 592         if (res)
 593                 buf[res-1] = '\n'; /* eat the leftover space */
 594         return res;
 595 }
 596
 597 static ssize_t bonding_store_arp_targets(struct device *d,
 598                                          struct device_attribute *attr,
 599                                          const char *buf, size_t count)
 600 {
 601         __be32 newtarget;
 602         int i = 0, done = 0, ret = count;
 603         struct bonding *bond = to_bond(d);
 604         __be32 *targets;
 605
 606         targets = bond->params.arp_targets;
 607         newtarget = in_aton(buf + 1);
 608         /* look for adds */
 609         if (buf[0] == '+') {
 610                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 611                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 612                                bond->dev->name, &newtarget);
 613                         ret = -EINVAL;
 614                         goto out;
 615                 }
 616                 /* look for an empty slot to put the target in, and check for dupes */
 617                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 618                         if (targets[i] == newtarget) { /* duplicate */
 619                                 pr_err("%s: ARP target %pI4 is already present\n",
 620                                        bond->dev->name, &newtarget);
 621                                 ret = -EINVAL;
 622                                 goto out;
 623                         }
 624                         if (targets[i] == 0) {
 625                                 pr_info("%s: adding ARP target %pI4.\n",
 626                                         bond->dev->name, &newtarget);
 627                                 done = 1;
 628                                 targets[i] = newtarget;
 629                         }
 630                 }
 631                 if (!done) {
 632                         pr_err("%s: ARP target table is full!\n",
 633                                bond->dev->name);
 634                         ret = -EINVAL;
 635                         goto out;
 636                 }
 637
 638         } else if (buf[0] == '-')       {
 639                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 640                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 641                                bond->dev->name, &newtarget);
 642                         ret = -EINVAL;
 643                         goto out;
 644                 }
 645
 646                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 647                         if (targets[i] == newtarget) {
 648                                 int j;
 649                                 pr_info("%s: removing ARP target %pI4.\n",
 650                                         bond->dev->name, &newtarget);
 651                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 652                                         targets[j] = targets[j+1];
 653
 654                                 targets[j] = 0;
 655                                 done = 1;
 656                         }
 657                 }
 658                 if (!done) {
 659                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 660                                 bond->dev->name, &newtarget);
 661                         ret = -EINVAL;
 662                         goto out;
 663                 }
 664         } else {
 665                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 666                        bond->dev->name);
 667                 ret = -EPERM;
 668                 goto out;
 669         }
 670
 671 out:
 672         return ret;
 673 }
 674 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 675
 676 /*
 677  * Show and set the up and down delays.  These must be multiples of the
 678  * MII monitoring value, and are stored internally as the multiplier.
 679  * Thus, we must translate to MS for the real world.
 680  */
 681 static ssize_t bonding_show_downdelay(struct device *d,
 682                                       struct device_attribute *attr,
 683                                       char *buf)
 684 {
 685         struct bonding *bond = to_bond(d);
 686
 687         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 688 }
 689
 690 static ssize_t bonding_store_downdelay(struct device *d,
 691                                        struct device_attribute *attr,
 692                                        const char *buf, size_t count)
 693 {
 694         int new_value, ret = count;
 695         struct bonding *bond = to_bond(d);
 696
 697         if (!rtnl_trylock())
 698                 return restart_syscall();
 699         if (!(bond->params.miimon)) {
 700                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 701                        bond->dev->name);
 702                 ret = -EPERM;
 703                 goto out;
 704         }
 705
 706         if (sscanf(buf, "%d", &new_value) != 1) {
 707                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 708                 ret = -EINVAL;
 709                 goto out;
 710         }
 711         if (new_value < 0) {
 712                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 713                        bond->dev->name, new_value, 0, INT_MAX);
 714                 ret = -EINVAL;
 715                 goto out;
 716         } else {
 717                 if ((new_value % bond->params.miimon) != 0) {
 718                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 719                                    bond->dev->name, new_value,
 720                                    bond->params.miimon,
 721                                    (new_value / bond->params.miimon) *
 722                                    bond->params.miimon);
 723                 }
 724                 bond->params.downdelay = new_value / bond->params.miimon;
 725                 pr_info("%s: Setting down delay to %d.\n",
 726                         bond->dev->name,
 727                         bond->params.downdelay * bond->params.miimon);
 728
 729         }
 730
 731 out:
 732         rtnl_unlock();
 733         return ret;
 734 }
 735 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 736                    bonding_show_downdelay, bonding_store_downdelay);
 737
 738 static ssize_t bonding_show_updelay(struct device *d,
 739                                     struct device_attribute *attr,
 740                                     char *buf)
 741 {
 742         struct bonding *bond = to_bond(d);
 743
 744         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 745
 746 }
 747
 748 static ssize_t bonding_store_updelay(struct device *d,
 749                                      struct device_attribute *attr,
 750                                      const char *buf, size_t count)
 751 {
 752         int new_value, ret = count;
 753         struct bonding *bond = to_bond(d);
 754
 755         if (!rtnl_trylock())
 756                 return restart_syscall();
 757         if (!(bond->params.miimon)) {
 758                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 759                        bond->dev->name);
 760                 ret = -EPERM;
 761                 goto out;
 762         }
 763
 764         if (sscanf(buf, "%d", &new_value) != 1) {
 765                 pr_err("%s: no up delay value specified.\n",
 766                        bond->dev->name);
 767                 ret = -EINVAL;
 768                 goto out;
 769         }
 770         if (new_value < 0) {
 771                 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
 772                        bond->dev->name, new_value, 0, INT_MAX);
 773                 ret = -EINVAL;
 774                 goto out;
 775         } else {
 776                 if ((new_value % bond->params.miimon) != 0) {
 777                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 778                                    bond->dev->name, new_value,
 779                                    bond->params.miimon,
 780                                    (new_value / bond->params.miimon) *
 781                                    bond->params.miimon);
 782                 }
 783                 bond->params.updelay = new_value / bond->params.miimon;
 784                 pr_info("%s: Setting up delay to %d.\n",
 785                         bond->dev->name,
 786                         bond->params.updelay * bond->params.miimon);
 787         }
 788
 789 out:
 790         rtnl_unlock();
 791         return ret;
 792 }
 793 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 794                    bonding_show_updelay, bonding_store_updelay);
 795
 796 /*
 797  * Show and set the LACP interval.  Interface must be down, and the mode
 798  * must be set to 802.3ad mode.
 799  */
 800 static ssize_t bonding_show_lacp(struct device *d,
 801                                  struct device_attribute *attr,
 802                                  char *buf)
 803 {
 804         struct bonding *bond = to_bond(d);
 805
 806         return sprintf(buf, "%s %d\n",
 807                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 808                 bond->params.lacp_fast);
 809 }
 810
 811 static ssize_t bonding_store_lacp(struct device *d,
 812                                   struct device_attribute *attr,
 813                                   const char *buf, size_t count)
 814 {
 815         int new_value, ret = count;
 816         struct bonding *bond = to_bond(d);
 817
 818         if (bond->dev->flags & IFF_UP) {
 819                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 820                        bond->dev->name);
 821                 ret = -EPERM;
 822                 goto out;
 823         }
 824
 825         if (bond->params.mode != BOND_MODE_8023AD) {
 826                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 827                        bond->dev->name);
 828                 ret = -EPERM;
 829                 goto out;
 830         }
 831
 832         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 833
 834         if ((new_value == 1) || (new_value == 0)) {
 835                 bond->params.lacp_fast = new_value;
 836                 bond_3ad_update_lacp_rate(bond);
 837                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 838                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 839                         new_value);
 840         } else {
 841                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 842                        bond->dev->name, (int)strlen(buf) - 1, buf);
 843                 ret = -EINVAL;
 844         }
 845 out:
 846         return ret;
 847 }
 848 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 849                    bonding_show_lacp, bonding_store_lacp);
 850
 851 static ssize_t bonding_show_min_links(struct device *d,
 852                                       struct device_attribute *attr,
 853                                       char *buf)
 854 {
 855         struct bonding *bond = to_bond(d);
 856
 857         return sprintf(buf, "%d\n", bond->params.min_links);
 858 }
 859
 860 static ssize_t bonding_store_min_links(struct device *d,
 861                                        struct device_attribute *attr,
 862                                        const char *buf, size_t count)
 863 {
 864         struct bonding *bond = to_bond(d);
 865         int ret;
 866         unsigned int new_value;
 867
 868         ret = kstrtouint(buf, 0, &new_value);
 869         if (ret < 0) {
 870                 pr_err("%s: Ignoring invalid min links value %s.\n",
 871                        bond->dev->name, buf);
 872                 return ret;
 873         }
 874
 875         pr_info("%s: Setting min links value to %u\n",
 876                 bond->dev->name, new_value);
 877         bond->params.min_links = new_value;
 878         return count;
 879 }
 880 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 881                    bonding_show_min_links, bonding_store_min_links);
 882
 883 static ssize_t bonding_show_ad_select(struct device *d,
 884                                       struct device_attribute *attr,
 885                                       char *buf)
 886 {
 887         struct bonding *bond = to_bond(d);
 888
 889         return sprintf(buf, "%s %d\n",
 890                 ad_select_tbl[bond->params.ad_select].modename,
 891                 bond->params.ad_select);
 892 }
 893
 894
 895 static ssize_t bonding_store_ad_select(struct device *d,
 896                                        struct device_attribute *attr,
 897                                        const char *buf, size_t count)
 898 {
 899         int new_value, ret = count;
 900         struct bonding *bond = to_bond(d);
 901
 902         if (bond->dev->flags & IFF_UP) {
 903                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 904                        bond->dev->name);
 905                 ret = -EPERM;
 906                 goto out;
 907         }
 908
 909         new_value = bond_parse_parm(buf, ad_select_tbl);
 910
 911         if (new_value != -1) {
 912                 bond->params.ad_select = new_value;
 913                 pr_info("%s: Setting ad_select to %s (%d).\n",
 914                         bond->dev->name, ad_select_tbl[new_value].modename,
 915                         new_value);
 916         } else {
 917                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 918                        bond->dev->name, (int)strlen(buf) - 1, buf);
 919                 ret = -EINVAL;
 920         }
 921 out:
 922         return ret;
 923 }
 924 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 925                    bonding_show_ad_select, bonding_store_ad_select);
 926
 927 /*
 928  * Show and set the number of peer notifications to send after a failover event.
 929  */
 930 static ssize_t bonding_show_num_peer_notif(struct device *d,
 931                                            struct device_attribute *attr,
 932                                            char *buf)
 933 {
 934         struct bonding *bond = to_bond(d);
 935         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 936 }
 937
 938 static ssize_t bonding_store_num_peer_notif(struct device *d,
 939                                             struct device_attribute *attr,
 940                                             const char *buf, size_t count)
 941 {
 942         struct bonding *bond = to_bond(d);
 943         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 944         return err ? err : count;
 945 }
 946 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 947                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 948 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 949                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 950
 951 /*
 952  * Show and set the MII monitor interval.  There are two tricky bits
 953  * here.  First, if MII monitoring is activated, then we must disable
 954  * ARP monitoring.  Second, if the timer isn't running, we must
 955  * start it.
 956  */
 957 static ssize_t bonding_show_miimon(struct device *d,
 958                                    struct device_attribute *attr,
 959                                    char *buf)
 960 {
 961         struct bonding *bond = to_bond(d);
 962
 963         return sprintf(buf, "%d\n", bond->params.miimon);
 964 }
 965
 966 static ssize_t bonding_store_miimon(struct device *d,
 967                                     struct device_attribute *attr,
 968                                     const char *buf, size_t count)
 969 {
 970         int new_value, ret = count;
 971         struct bonding *bond = to_bond(d);
 972
 973         if (!rtnl_trylock())
 974                 return restart_syscall();
 975         if (sscanf(buf, "%d", &new_value) != 1) {
 976                 pr_err("%s: no miimon value specified.\n",
 977                        bond->dev->name);
 978                 ret = -EINVAL;
 979                 goto out;
 980         }
 981         if (new_value < 0) {
 982                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 983                        bond->dev->name, new_value, 0, INT_MAX);
 984                 ret = -EINVAL;
 985                 goto out;
 986         }
 987         pr_info("%s: Setting MII monitoring interval to %d.\n",
 988                 bond->dev->name, new_value);
 989         bond->params.miimon = new_value;
 990         if (bond->params.updelay)
 991                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 992                         bond->dev->name,
 993                         bond->params.updelay * bond->params.miimon);
 994         if (bond->params.downdelay)
 995                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 996                         bond->dev->name,
 997                         bond->params.downdelay * bond->params.miimon);
 998         if (new_value && bond->params.arp_interval) {
 999                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1000                         bond->dev->name);
1001                 bond->params.arp_interval = 0;
1002                 if (bond->params.arp_validate)
1003                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1004         }
1005         if (bond->dev->flags & IFF_UP) {
1006                 /* If the interface is up, we may need to fire off
1007                  * the MII timer. If the interface is down, the
1008                  * timer will get fired off when the open function
1009                  * is called.
1010                  */
1011                 if (!new_value) {
1012                         cancel_delayed_work_sync(&bond->mii_work);
1013                 } else {
1014                         cancel_delayed_work_sync(&bond->arp_work);
1015                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1016                 }
1017         }
1018 out:
1019         rtnl_unlock();
1020         return ret;
1021 }
1022 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1023                    bonding_show_miimon, bonding_store_miimon);
1024
1025 /*
1026  * Show and set the primary slave.  The store function is much
1027  * simpler than bonding_store_slaves function because it only needs to
1028  * handle one interface name.
1029  * The bond must be a mode that supports a primary for this be
1030  * set.
1031  */
1032 static ssize_t bonding_show_primary(struct device *d,
1033                                     struct device_attribute *attr,
1034                                     char *buf)
1035 {
1036         int count = 0;
1037         struct bonding *bond = to_bond(d);
1038
1039         if (bond->primary_slave)
1040                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1041
1042         return count;
1043 }
1044
1045 static ssize_t bonding_store_primary(struct device *d,
1046                                      struct device_attribute *attr,
1047                                      const char *buf, size_t count)
1048 {
1049         int i;
1050         struct slave *slave;
1051         struct bonding *bond = to_bond(d);
1052         char ifname[IFNAMSIZ];
1053
1054         if (!rtnl_trylock())
1055                 return restart_syscall();
1056         block_netpoll_tx();
1057         read_lock(&bond->lock);
1058         write_lock_bh(&bond->curr_slave_lock);
1059
1060         if (!USES_PRIMARY(bond->params.mode)) {
1061                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1062                         bond->dev->name, bond->dev->name, bond->params.mode);
1063                 goto out;
1064         }
1065
1066         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1067
1068         /* check to see if we are clearing primary */
1069         if (!strlen(ifname) || buf[0] == '\n') {
1070                 pr_info("%s: Setting primary slave to None.\n",
1071                         bond->dev->name);
1072                 bond->primary_slave = NULL;
1073                 bond_select_active_slave(bond);
1074                 goto out;
1075         }
1076
1077         bond_for_each_slave(bond, slave, i) {
1078                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1079                         pr_info("%s: Setting %s as primary slave.\n",
1080                                 bond->dev->name, slave->dev->name);
1081                         bond->primary_slave = slave;
1082                         strcpy(bond->params.primary, slave->dev->name);
1083                         bond_select_active_slave(bond);
1084                         goto out;
1085                 }
1086         }
1087
1088         pr_info("%s: Unable to set %.*s as primary slave.\n",
1089                 bond->dev->name, (int)strlen(buf) - 1, buf);
1090 out:
1091         write_unlock_bh(&bond->curr_slave_lock);
1092         read_unlock(&bond->lock);
1093         unblock_netpoll_tx();
1094         rtnl_unlock();
1095
1096         return count;
1097 }
1098 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1099                    bonding_show_primary, bonding_store_primary);
1100
1101 /*
1102  * Show and set the primary_reselect flag.
1103  */
1104 static ssize_t bonding_show_primary_reselect(struct device *d,
1105                                              struct device_attribute *attr,
1106                                              char *buf)
1107 {
1108         struct bonding *bond = to_bond(d);
1109
1110         return sprintf(buf, "%s %d\n",
1111                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1112                        bond->params.primary_reselect);
1113 }
1114
1115 static ssize_t bonding_store_primary_reselect(struct device *d,
1116                                               struct device_attribute *attr,
1117                                               const char *buf, size_t count)
1118 {
1119         int new_value, ret = count;
1120         struct bonding *bond = to_bond(d);
1121
1122         if (!rtnl_trylock())
1123                 return restart_syscall();
1124
1125         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1126         if (new_value < 0)  {
1127                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1128                        bond->dev->name,
1129                        (int) strlen(buf) - 1, buf);
1130                 ret = -EINVAL;
1131                 goto out;
1132         }
1133
1134         bond->params.primary_reselect = new_value;
1135         pr_info("%s: setting primary_reselect to %s (%d).\n",
1136                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1137                 new_value);
1138
1139         block_netpoll_tx();
1140         read_lock(&bond->lock);
1141         write_lock_bh(&bond->curr_slave_lock);
1142         bond_select_active_slave(bond);
1143         write_unlock_bh(&bond->curr_slave_lock);
1144         read_unlock(&bond->lock);
1145         unblock_netpoll_tx();
1146 out:
1147         rtnl_unlock();
1148         return ret;
1149 }
1150 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1151                    bonding_show_primary_reselect,
1152                    bonding_store_primary_reselect);
1153
1154 /*
1155  * Show and set the use_carrier flag.
1156  */
1157 static ssize_t bonding_show_carrier(struct device *d,
1158                                     struct device_attribute *attr,
1159                                     char *buf)
1160 {
1161         struct bonding *bond = to_bond(d);
1162
1163         return sprintf(buf, "%d\n", bond->params.use_carrier);
1164 }
1165
1166 static ssize_t bonding_store_carrier(struct device *d,
1167                                      struct device_attribute *attr,
1168                                      const char *buf, size_t count)
1169 {
1170         int new_value, ret = count;
1171         struct bonding *bond = to_bond(d);
1172
1173
1174         if (sscanf(buf, "%d", &new_value) != 1) {
1175                 pr_err("%s: no use_carrier value specified.\n",
1176                        bond->dev->name);
1177                 ret = -EINVAL;
1178                 goto out;
1179         }
1180         if ((new_value == 0) || (new_value == 1)) {
1181                 bond->params.use_carrier = new_value;
1182                 pr_info("%s: Setting use_carrier to %d.\n",
1183                         bond->dev->name, new_value);
1184         } else {
1185                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1186                         bond->dev->name, new_value);
1187         }
1188 out:
1189         return ret;
1190 }
1191 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1192                    bonding_show_carrier, bonding_store_carrier);
1193
1194
1195 /*
1196  * Show and set currently active_slave.
1197  */
1198 static ssize_t bonding_show_active_slave(struct device *d,
1199                                          struct device_attribute *attr,
1200                                          char *buf)
1201 {
1202         struct slave *curr;
1203         struct bonding *bond = to_bond(d);
1204         int count = 0;
1205
1206         read_lock(&bond->curr_slave_lock);
1207         curr = bond->curr_active_slave;
1208         read_unlock(&bond->curr_slave_lock);
1209
1210         if (USES_PRIMARY(bond->params.mode) && curr)
1211                 count = sprintf(buf, "%s\n", curr->dev->name);
1212         return count;
1213 }
1214
1215 static ssize_t bonding_store_active_slave(struct device *d,
1216                                           struct device_attribute *attr,
1217                                           const char *buf, size_t count)
1218 {
1219         int i;
1220         struct slave *slave;
1221         struct slave *old_active = NULL;
1222         struct slave *new_active = NULL;
1223         struct bonding *bond = to_bond(d);
1224         char ifname[IFNAMSIZ];
1225
1226         if (!rtnl_trylock())
1227                 return restart_syscall();
1228
1229         block_netpoll_tx();
1230         read_lock(&bond->lock);
1231         write_lock_bh(&bond->curr_slave_lock);
1232
1233         if (!USES_PRIMARY(bond->params.mode)) {
1234                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1235                         bond->dev->name, bond->dev->name, bond->params.mode);
1236                 goto out;
1237         }
1238
1239         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1240
1241         /* check to see if we are clearing active */
1242         if (!strlen(ifname) || buf[0] == '\n') {
1243                 pr_info("%s: Clearing current active slave.\n",
1244                         bond->dev->name);
1245                 bond->curr_active_slave = NULL;
1246                 bond_select_active_slave(bond);
1247                 goto out;
1248         }
1249
1250         bond_for_each_slave(bond, slave, i) {
1251                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1252                         old_active = bond->curr_active_slave;
1253                         new_active = slave;
1254                         if (new_active == old_active) {
1255                                 /* do nothing */
1256                                 pr_info("%s: %s is already the current"
1257                                         " active slave.\n",
1258                                         bond->dev->name,
1259                                         slave->dev->name);
1260                                 goto out;
1261                         }
1262                         else {
1263                                 if ((new_active) &&
1264                                     (old_active) &&
1265                                     (new_active->link == BOND_LINK_UP) &&
1266                                     IS_UP(new_active->dev)) {
1267                                         pr_info("%s: Setting %s as active"
1268                                                 " slave.\n",
1269                                                 bond->dev->name,
1270                                                 slave->dev->name);
1271                                         bond_change_active_slave(bond,
1272                                                                  new_active);
1273                                 }
1274                                 else {
1275                                         pr_info("%s: Could not set %s as"
1276                                                 " active slave; either %s is"
1277                                                 " down or the link is down.\n",
1278                                                 bond->dev->name,
1279                                                 slave->dev->name,
1280                                                 slave->dev->name);
1281                                 }
1282                                 goto out;
1283                         }
1284                 }
1285         }
1286
1287         pr_info("%s: Unable to set %.*s as active slave.\n",
1288                 bond->dev->name, (int)strlen(buf) - 1, buf);
1289  out:
1290         write_unlock_bh(&bond->curr_slave_lock);
1291         read_unlock(&bond->lock);
1292         unblock_netpoll_tx();
1293
1294         rtnl_unlock();
1295
1296         return count;
1297
1298 }
1299 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1300                    bonding_show_active_slave, bonding_store_active_slave);
1301
1302
1303 /*
1304  * Show link status of the bond interface.
1305  */
1306 static ssize_t bonding_show_mii_status(struct device *d,
1307                                        struct device_attribute *attr,
1308                                        char *buf)
1309 {
1310         struct slave *curr;
1311         struct bonding *bond = to_bond(d);
1312
1313         read_lock(&bond->curr_slave_lock);
1314         curr = bond->curr_active_slave;
1315         read_unlock(&bond->curr_slave_lock);
1316
1317         return sprintf(buf, "%s\n", curr ? "up" : "down");
1318 }
1319 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1320
1321
1322 /*
1323  * Show current 802.3ad aggregator ID.
1324  */
1325 static ssize_t bonding_show_ad_aggregator(struct device *d,
1326                                           struct device_attribute *attr,
1327                                           char *buf)
1328 {
1329         int count = 0;
1330         struct bonding *bond = to_bond(d);
1331
1332         if (bond->params.mode == BOND_MODE_8023AD) {
1333                 struct ad_info ad_info;
1334                 count = sprintf(buf, "%d\n",
1335                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1336                                 ?  0 : ad_info.aggregator_id);
1337         }
1338
1339         return count;
1340 }
1341 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1342
1343
1344 /*
1345  * Show number of active 802.3ad ports.
1346  */
1347 static ssize_t bonding_show_ad_num_ports(struct device *d,
1348                                          struct device_attribute *attr,
1349                                          char *buf)
1350 {
1351         int count = 0;
1352         struct bonding *bond = to_bond(d);
1353
1354         if (bond->params.mode == BOND_MODE_8023AD) {
1355                 struct ad_info ad_info;
1356                 count = sprintf(buf, "%d\n",
1357                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1358                                 ?  0 : ad_info.ports);
1359         }
1360
1361         return count;
1362 }
1363 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1364
1365
1366 /*
1367  * Show current 802.3ad actor key.
1368  */
1369 static ssize_t bonding_show_ad_actor_key(struct device *d,
1370                                          struct device_attribute *attr,
1371                                          char *buf)
1372 {
1373         int count = 0;
1374         struct bonding *bond = to_bond(d);
1375
1376         if (bond->params.mode == BOND_MODE_8023AD) {
1377                 struct ad_info ad_info;
1378                 count = sprintf(buf, "%d\n",
1379                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1380                                 ?  0 : ad_info.actor_key);
1381         }
1382
1383         return count;
1384 }
1385 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1386
1387
1388 /*
1389  * Show current 802.3ad partner key.
1390  */
1391 static ssize_t bonding_show_ad_partner_key(struct device *d,
1392                                            struct device_attribute *attr,
1393                                            char *buf)
1394 {
1395         int count = 0;
1396         struct bonding *bond = to_bond(d);
1397
1398         if (bond->params.mode == BOND_MODE_8023AD) {
1399                 struct ad_info ad_info;
1400                 count = sprintf(buf, "%d\n",
1401                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1402                                 ?  0 : ad_info.partner_key);
1403         }
1404
1405         return count;
1406 }
1407 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1408
1409
1410 /*
1411  * Show current 802.3ad partner mac.
1412  */
1413 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1414                                            struct device_attribute *attr,
1415                                            char *buf)
1416 {
1417         int count = 0;
1418         struct bonding *bond = to_bond(d);
1419
1420         if (bond->params.mode == BOND_MODE_8023AD) {
1421                 struct ad_info ad_info;
1422                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1423                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1424         }
1425
1426         return count;
1427 }
1428 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1429
1430 /*
1431  * Show the queue_ids of the slaves in the current bond.
1432  */
1433 static ssize_t bonding_show_queue_id(struct device *d,
1434                                      struct device_attribute *attr,
1435                                      char *buf)
1436 {
1437         struct slave *slave;
1438         int i, res = 0;
1439         struct bonding *bond = to_bond(d);
1440
1441         if (!rtnl_trylock())
1442                 return restart_syscall();
1443
1444         read_lock(&bond->lock);
1445         bond_for_each_slave(bond, slave, i) {
1446                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1447                         /* not enough space for another interface_name:queue_id pair */
1448                         if ((PAGE_SIZE - res) > 10)
1449                                 res = PAGE_SIZE - 10;
1450                         res += sprintf(buf + res, "++more++ ");
1451                         break;
1452                 }
1453                 res += sprintf(buf + res, "%s:%d ",
1454                                slave->dev->name, slave->queue_id);
1455         }
1456         read_unlock(&bond->lock);
1457         if (res)
1458                 buf[res-1] = '\n'; /* eat the leftover space */
1459         rtnl_unlock();
1460         return res;
1461 }
1462
1463 /*
1464  * Set the queue_ids of the  slaves in the current bond.  The bond
1465  * interface must be enslaved for this to work.
1466  */
1467 static ssize_t bonding_store_queue_id(struct device *d,
1468                                       struct device_attribute *attr,
1469                                       const char *buffer, size_t count)
1470 {
1471         struct slave *slave, *update_slave;
1472         struct bonding *bond = to_bond(d);
1473         u16 qid;
1474         int i, ret = count;
1475         char *delim;
1476         struct net_device *sdev = NULL;
1477
1478         if (!rtnl_trylock())
1479                 return restart_syscall();
1480
1481         /* delim will point to queue id if successful */
1482         delim = strchr(buffer, ':');
1483         if (!delim)
1484                 goto err_no_cmd;
1485
1486         /*
1487          * Terminate string that points to device name and bump it
1488          * up one, so we can read the queue id there.
1489          */
1490         *delim = '\0';
1491         if (sscanf(++delim, "%hd\n", &qid) != 1)
1492                 goto err_no_cmd;
1493
1494         /* Check buffer length, valid ifname and queue id */
1495         if (strlen(buffer) > IFNAMSIZ ||
1496             !dev_valid_name(buffer) ||
1497             qid > bond->params.tx_queues)
1498                 goto err_no_cmd;
1499
1500         /* Get the pointer to that interface if it exists */
1501         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1502         if (!sdev)
1503                 goto err_no_cmd;
1504
1505         read_lock(&bond->lock);
1506
1507         /* Search for thes slave and check for duplicate qids */
1508         update_slave = NULL;
1509         bond_for_each_slave(bond, slave, i) {
1510                 if (sdev == slave->dev)
1511                         /*
1512                          * We don't need to check the matching
1513                          * slave for dups, since we're overwriting it
1514                          */
1515                         update_slave = slave;
1516                 else if (qid && qid == slave->queue_id) {
1517                         goto err_no_cmd_unlock;
1518                 }
1519         }
1520
1521         if (!update_slave)
1522                 goto err_no_cmd_unlock;
1523
1524         /* Actually set the qids for the slave */
1525         update_slave->queue_id = qid;
1526
1527         read_unlock(&bond->lock);
1528 out:
1529         rtnl_unlock();
1530         return ret;
1531
1532 err_no_cmd_unlock:
1533         read_unlock(&bond->lock);
1534 err_no_cmd:
1535         pr_info("invalid input for queue_id set for %s.\n",
1536                 bond->dev->name);
1537         ret = -EPERM;
1538         goto out;
1539 }
1540
1541 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1542                    bonding_store_queue_id);
1543
1544
1545 /*
1546  * Show and set the all_slaves_active flag.
1547  */
1548 static ssize_t bonding_show_slaves_active(struct device *d,
1549                                           struct device_attribute *attr,
1550                                           char *buf)
1551 {
1552         struct bonding *bond = to_bond(d);
1553
1554         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1555 }
1556
1557 static ssize_t bonding_store_slaves_active(struct device *d,
1558                                            struct device_attribute *attr,
1559                                            const char *buf, size_t count)
1560 {
1561         int i, new_value, ret = count;
1562         struct bonding *bond = to_bond(d);
1563         struct slave *slave;
1564
1565         if (sscanf(buf, "%d", &new_value) != 1) {
1566                 pr_err("%s: no all_slaves_active value specified.\n",
1567                        bond->dev->name);
1568                 ret = -EINVAL;
1569                 goto out;
1570         }
1571
1572         if (new_value == bond->params.all_slaves_active)
1573                 goto out;
1574
1575         if ((new_value == 0) || (new_value == 1)) {
1576                 bond->params.all_slaves_active = new_value;
1577         } else {
1578                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1579                         bond->dev->name, new_value);
1580                 ret = -EINVAL;
1581                 goto out;
1582         }
1583
1584         read_lock(&bond->lock);
1585         bond_for_each_slave(bond, slave, i) {
1586                 if (!bond_is_active_slave(slave)) {
1587                         if (new_value)
1588                                 slave->inactive = 0;
1589                         else
1590                                 slave->inactive = 1;
1591                 }
1592         }
1593         read_unlock(&bond->lock);
1594 out:
1595         return ret;
1596 }
1597 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1598                    bonding_show_slaves_active, bonding_store_slaves_active);
1599
1600 /*
1601  * Show and set the number of IGMP membership reports to send on link failure
1602  */
1603 static ssize_t bonding_show_resend_igmp(struct device *d,
1604                                         struct device_attribute *attr,
1605                                         char *buf)
1606 {
1607         struct bonding *bond = to_bond(d);
1608
1609         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1610 }
1611
1612 static ssize_t bonding_store_resend_igmp(struct device *d,
1613                                          struct device_attribute *attr,
1614                                          const char *buf, size_t count)
1615 {
1616         int new_value, ret = count;
1617         struct bonding *bond = to_bond(d);
1618
1619         if (sscanf(buf, "%d", &new_value) != 1) {
1620                 pr_err("%s: no resend_igmp value specified.\n",
1621                        bond->dev->name);
1622                 ret = -EINVAL;
1623                 goto out;
1624         }
1625
1626         if (new_value < 0 || new_value > 255) {
1627                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1628                        bond->dev->name, new_value);
1629                 ret = -EINVAL;
1630                 goto out;
1631         }
1632
1633         pr_info("%s: Setting resend_igmp to %d.\n",
1634                 bond->dev->name, new_value);
1635         bond->params.resend_igmp = new_value;
1636 out:
1637         return ret;
1638 }
1639
1640 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1641                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1642
1643 static struct attribute *per_bond_attrs[] = {
1644         &dev_attr_slaves.attr,
1645         &dev_attr_mode.attr,
1646         &dev_attr_fail_over_mac.attr,
1647         &dev_attr_arp_validate.attr,
1648         &dev_attr_arp_interval.attr,
1649         &dev_attr_arp_ip_target.attr,
1650         &dev_attr_downdelay.attr,
1651         &dev_attr_updelay.attr,
1652         &dev_attr_lacp_rate.attr,
1653         &dev_attr_ad_select.attr,
1654         &dev_attr_xmit_hash_policy.attr,
1655         &dev_attr_num_grat_arp.attr,
1656         &dev_attr_num_unsol_na.attr,
1657         &dev_attr_miimon.attr,
1658         &dev_attr_primary.attr,
1659         &dev_attr_primary_reselect.attr,
1660         &dev_attr_use_carrier.attr,
1661         &dev_attr_active_slave.attr,
1662         &dev_attr_mii_status.attr,
1663         &dev_attr_ad_aggregator.attr,
1664         &dev_attr_ad_num_ports.attr,
1665         &dev_attr_ad_actor_key.attr,
1666         &dev_attr_ad_partner_key.attr,
1667         &dev_attr_ad_partner_mac.attr,
1668         &dev_attr_queue_id.attr,
1669         &dev_attr_all_slaves_active.attr,
1670         &dev_attr_resend_igmp.attr,
1671         &dev_attr_min_links.attr,
1672         NULL,
1673 };
1674
1675 static struct attribute_group bonding_group = {
1676         .name = "bonding",
1677         .attrs = per_bond_attrs,
1678 };
1679
1680 /*
1681  * Initialize sysfs.  This sets up the bonding_masters file in
1682  * /sys/class/net.
1683  */
1684 int bond_create_sysfs(struct bond_net *bn)
1685 {
1686         int ret;
1687
1688         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1689         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1690
1691         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1692         /*
1693          * Permit multiple loads of the module by ignoring failures to
1694          * create the bonding_masters sysfs file.  Bonding devices
1695          * created by second or subsequent loads of the module will
1696          * not be listed in, or controllable by, bonding_masters, but
1697          * will have the usual "bonding" sysfs directory.
1698          *
1699          * This is done to preserve backwards compatibility for
1700          * initscripts/sysconfig, which load bonding multiple times to
1701          * configure multiple bonding devices.
1702          */
1703         if (ret == -EEXIST) {
1704                 /* Is someone being kinky and naming a device bonding_master? */
1705                 if (__dev_get_by_name(bn->net,
1706                                       class_attr_bonding_masters.attr.name))
1707                         pr_err("network device named %s already exists in sysfs",
1708                                class_attr_bonding_masters.attr.name);
1709                 ret = 0;
1710         }
1711
1712         return ret;
1713
1714 }
1715
1716 /*
1717  * Remove /sys/class/net/bonding_masters.
1718  */
1719 void bond_destroy_sysfs(struct bond_net *bn)
1720 {
1721         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1722 }
1723
1724 /*
1725  * Initialize sysfs for each bond.  This sets up and registers
1726  * the 'bondctl' directory for each individual bond under /sys/class/net.
1727  */
1728 void bond_prepare_sysfs_group(struct bonding *bond)
1729 {
1730         bond->dev->sysfs_groups[0] = &bonding_group;
1731 }
1732