drivers/net/bonding/bond_sysfs.c

   1 /*
   2  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <linux/sched.h>
  29 #include <linux/fs.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/inetdevice.h>
  34 #include <linux/in.h>
  35 #include <linux/sysfs.h>
  36 #include <linux/ctype.h>
  37 #include <linux/inet.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/etherdevice.h>
  40 #include <net/net_namespace.h>
  41 #include <net/netns/generic.h>
  42 #include <linux/nsproxy.h>
  43
  44 #include "bonding.h"
  45
  46 #define to_dev(obj)     container_of(obj, struct device, kobj)
  47 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  48
  49 /*
  50  * "show" function for the bond_masters attribute.
  51  * The class parameter is ignored.
  52  */
  53 static ssize_t bonding_show_bonds(struct class *cls,
  54                                   struct class_attribute *attr,
  55                                   char *buf)
  56 {
  57         struct bond_net *bn =
  58                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  59         int res = 0;
  60         struct bonding *bond;
  61
  62         rtnl_lock();
  63
  64         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  65                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  66                         /* not enough space for another interface name */
  67                         if ((PAGE_SIZE - res) > 10)
  68                                 res = PAGE_SIZE - 10;
  69                         res += sprintf(buf + res, "++more++ ");
  70                         break;
  71                 }
  72                 res += sprintf(buf + res, "%s ", bond->dev->name);
  73         }
  74         if (res)
  75                 buf[res-1] = '\n'; /* eat the leftover space */
  76
  77         rtnl_unlock();
  78         return res;
  79 }
  80
  81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  82 {
  83         struct bonding *bond;
  84
  85         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  86                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  87                         return bond->dev;
  88         }
  89         return NULL;
  90 }
  91
  92 /*
  93  * "store" function for the bond_masters attribute.  This is what
  94  * creates and deletes entire bonds.
  95  *
  96  * The class parameter is ignored.
  97  *
  98  */
  99
 100 static ssize_t bonding_store_bonds(struct class *cls,
 101                                    struct class_attribute *attr,
 102                                    const char *buffer, size_t count)
 103 {
 104         struct bond_net *bn =
 105                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 106         char command[IFNAMSIZ + 1] = {0, };
 107         char *ifname;
 108         int rv, res = count;
 109
 110         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 111         ifname = command + 1;
 112         if ((strlen(command) <= 1) ||
 113             !dev_valid_name(ifname))
 114                 goto err_no_cmd;
 115
 116         if (command[0] == '+') {
 117                 pr_info("%s is being created...\n", ifname);
 118                 rv = bond_create(bn->net, ifname);
 119                 if (rv) {
 120                         if (rv == -EEXIST)
 121                                 pr_info("%s already exists.\n", ifname);
 122                         else
 123                                 pr_info("%s creation failed.\n", ifname);
 124                         res = rv;
 125                 }
 126         } else if (command[0] == '-') {
 127                 struct net_device *bond_dev;
 128
 129                 rtnl_lock();
 130                 bond_dev = bond_get_by_name(bn, ifname);
 131                 if (bond_dev) {
 132                         pr_info("%s is being deleted...\n", ifname);
 133                         unregister_netdevice(bond_dev);
 134                 } else {
 135                         pr_err("unable to delete non-existent %s\n", ifname);
 136                         res = -ENODEV;
 137                 }
 138                 rtnl_unlock();
 139         } else
 140                 goto err_no_cmd;
 141
 142         /* Always return either count or an error.  If you return 0, you'll
 143          * get called forever, which is bad.
 144          */
 145         return res;
 146
 147 err_no_cmd:
 148         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 149         return -EPERM;
 150 }
 151
 152 static const void *bonding_namespace(struct class *cls,
 153                                      const struct class_attribute *attr)
 154 {
 155         const struct bond_net *bn =
 156                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 157         return bn->net;
 158 }
 159
 160 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 161 static const struct class_attribute class_attr_bonding_masters = {
 162         .attr = {
 163                 .name = "bonding_masters",
 164                 .mode = S_IWUSR | S_IRUGO,
 165         },
 166         .show = bonding_show_bonds,
 167         .store = bonding_store_bonds,
 168         .namespace = bonding_namespace,
 169 };
 170
 171 int bond_create_slave_symlinks(struct net_device *master,
 172                                struct net_device *slave)
 173 {
 174         char linkname[IFNAMSIZ+7];
 175         int ret = 0;
 176
 177         /* first, create a link from the slave back to the master */
 178         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 179                                 "master");
 180         if (ret)
 181                 return ret;
 182         /* next, create a link from the master to the slave */
 183         sprintf(linkname, "slave_%s", slave->name);
 184         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 185                                 linkname);
 186
 187         /* free the master link created earlier in case of error */
 188         if (ret)
 189                 sysfs_remove_link(&(slave->dev.kobj), "master");
 190
 191         return ret;
 192
 193 }
 194
 195 void bond_destroy_slave_symlinks(struct net_device *master,
 196                                  struct net_device *slave)
 197 {
 198         char linkname[IFNAMSIZ+7];
 199
 200         sysfs_remove_link(&(slave->dev.kobj), "master");
 201         sprintf(linkname, "slave_%s", slave->name);
 202         sysfs_remove_link(&(master->dev.kobj), linkname);
 203 }
 204
 205
 206 /*
 207  * Show the slaves in the current bond.
 208  */
 209 static ssize_t bonding_show_slaves(struct device *d,
 210                                    struct device_attribute *attr, char *buf)
 211 {
 212         struct slave *slave;
 213         int i, res = 0;
 214         struct bonding *bond = to_bond(d);
 215
 216         read_lock(&bond->lock);
 217         bond_for_each_slave(bond, slave, i) {
 218                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 219                         /* not enough space for another interface name */
 220                         if ((PAGE_SIZE - res) > 10)
 221                                 res = PAGE_SIZE - 10;
 222                         res += sprintf(buf + res, "++more++ ");
 223                         break;
 224                 }
 225                 res += sprintf(buf + res, "%s ", slave->dev->name);
 226         }
 227         read_unlock(&bond->lock);
 228         if (res)
 229                 buf[res-1] = '\n'; /* eat the leftover space */
 230         return res;
 231 }
 232
 233 /*
 234  * Set the slaves in the current bond.  The bond interface must be
 235  * up for this to succeed.
 236  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 237  * All hard work should be done there.
 238  */
 239 static ssize_t bonding_store_slaves(struct device *d,
 240                                     struct device_attribute *attr,
 241                                     const char *buffer, size_t count)
 242 {
 243         char command[IFNAMSIZ + 1] = { 0, };
 244         char *ifname;
 245         int res, ret = count;
 246         struct net_device *dev;
 247         struct bonding *bond = to_bond(d);
 248
 249         if (!rtnl_trylock())
 250                 return restart_syscall();
 251
 252         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 253         ifname = command + 1;
 254         if ((strlen(command) <= 1) ||
 255             !dev_valid_name(ifname))
 256                 goto err_no_cmd;
 257
 258         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 259         if (!dev) {
 260                 pr_info("%s: Interface %s does not exist!\n",
 261                         bond->dev->name, ifname);
 262                 ret = -ENODEV;
 263                 goto out;
 264         }
 265
 266         switch (command[0]) {
 267         case '+':
 268                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 269                 res = bond_enslave(bond->dev, dev);
 270                 break;
 271
 272         case '-':
 273                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 274                 res = bond_release(bond->dev, dev);
 275                 break;
 276
 277         default:
 278                 goto err_no_cmd;
 279         }
 280
 281         if (res)
 282                 ret = res;
 283         goto out;
 284
 285 err_no_cmd:
 286         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 287                bond->dev->name);
 288         ret = -EPERM;
 289
 290 out:
 291         rtnl_unlock();
 292         return ret;
 293 }
 294
 295 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 296                    bonding_store_slaves);
 297
 298 /*
 299  * Show and set the bonding mode.  The bond interface must be down to
 300  * change the mode.
 301  */
 302 static ssize_t bonding_show_mode(struct device *d,
 303                                  struct device_attribute *attr, char *buf)
 304 {
 305         struct bonding *bond = to_bond(d);
 306
 307         return sprintf(buf, "%s %d\n",
 308                         bond_mode_tbl[bond->params.mode].modename,
 309                         bond->params.mode);
 310 }
 311
 312 static ssize_t bonding_store_mode(struct device *d,
 313                                   struct device_attribute *attr,
 314                                   const char *buf, size_t count)
 315 {
 316         int new_value, ret = count;
 317         struct bonding *bond = to_bond(d);
 318
 319         if (bond->dev->flags & IFF_UP) {
 320                 pr_err("unable to update mode of %s because interface is up.\n",
 321                        bond->dev->name);
 322                 ret = -EPERM;
 323                 goto out;
 324         }
 325
 326         if (bond->slave_cnt > 0) {
 327                 pr_err("unable to update mode of %s because it has slaves.\n",
 328                         bond->dev->name);
 329                 ret = -EPERM;
 330                 goto out;
 331         }
 332
 333         new_value = bond_parse_parm(buf, bond_mode_tbl);
 334         if (new_value < 0)  {
 335                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 336                        bond->dev->name, (int)strlen(buf) - 1, buf);
 337                 ret = -EINVAL;
 338                 goto out;
 339         }
 340         if ((new_value == BOND_MODE_ALB ||
 341              new_value == BOND_MODE_TLB) &&
 342             bond->params.arp_interval) {
 343                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 344                        bond->dev->name, bond_mode_tbl[new_value].modename);
 345                 ret = -EINVAL;
 346                 goto out;
 347         }
 348
 349         bond->params.mode = new_value;
 350         bond_set_mode_ops(bond, bond->params.mode);
 351         pr_info("%s: setting mode to %s (%d).\n",
 352                 bond->dev->name, bond_mode_tbl[new_value].modename,
 353                 new_value);
 354 out:
 355         return ret;
 356 }
 357 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 358                    bonding_show_mode, bonding_store_mode);
 359
 360 /*
 361  * Show and set the bonding transmit hash method.
 362  * The bond interface must be down to change the xmit hash policy.
 363  */
 364 static ssize_t bonding_show_xmit_hash(struct device *d,
 365                                       struct device_attribute *attr,
 366                                       char *buf)
 367 {
 368         struct bonding *bond = to_bond(d);
 369
 370         return sprintf(buf, "%s %d\n",
 371                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 372                        bond->params.xmit_policy);
 373 }
 374
 375 static ssize_t bonding_store_xmit_hash(struct device *d,
 376                                        struct device_attribute *attr,
 377                                        const char *buf, size_t count)
 378 {
 379         int new_value, ret = count;
 380         struct bonding *bond = to_bond(d);
 381
 382         if (bond->dev->flags & IFF_UP) {
 383                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 384                        bond->dev->name);
 385                 ret = -EPERM;
 386                 goto out;
 387         }
 388
 389         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 390         if (new_value < 0)  {
 391                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 392                        bond->dev->name,
 393                        (int)strlen(buf) - 1, buf);
 394                 ret = -EINVAL;
 395                 goto out;
 396         } else {
 397                 bond->params.xmit_policy = new_value;
 398                 bond_set_mode_ops(bond, bond->params.mode);
 399                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 400                         bond->dev->name,
 401                         xmit_hashtype_tbl[new_value].modename, new_value);
 402         }
 403 out:
 404         return ret;
 405 }
 406 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 407                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 408
 409 /*
 410  * Show and set arp_validate.
 411  */
 412 static ssize_t bonding_show_arp_validate(struct device *d,
 413                                          struct device_attribute *attr,
 414                                          char *buf)
 415 {
 416         struct bonding *bond = to_bond(d);
 417
 418         return sprintf(buf, "%s %d\n",
 419                        arp_validate_tbl[bond->params.arp_validate].modename,
 420                        bond->params.arp_validate);
 421 }
 422
 423 static ssize_t bonding_store_arp_validate(struct device *d,
 424                                           struct device_attribute *attr,
 425                                           const char *buf, size_t count)
 426 {
 427         int new_value;
 428         struct bonding *bond = to_bond(d);
 429
 430         new_value = bond_parse_parm(buf, arp_validate_tbl);
 431         if (new_value < 0) {
 432                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 433                        bond->dev->name, buf);
 434                 return -EINVAL;
 435         }
 436         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 437                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 438                        bond->dev->name);
 439                 return -EINVAL;
 440         }
 441         pr_info("%s: setting arp_validate to %s (%d).\n",
 442                 bond->dev->name, arp_validate_tbl[new_value].modename,
 443                 new_value);
 444
 445         bond->params.arp_validate = new_value;
 446
 447         return count;
 448 }
 449
 450 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 451                    bonding_store_arp_validate);
 452
 453 /*
 454  * Show and store fail_over_mac.  User only allowed to change the
 455  * value when there are no slaves.
 456  */
 457 static ssize_t bonding_show_fail_over_mac(struct device *d,
 458                                           struct device_attribute *attr,
 459                                           char *buf)
 460 {
 461         struct bonding *bond = to_bond(d);
 462
 463         return sprintf(buf, "%s %d\n",
 464                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 465                        bond->params.fail_over_mac);
 466 }
 467
 468 static ssize_t bonding_store_fail_over_mac(struct device *d,
 469                                            struct device_attribute *attr,
 470                                            const char *buf, size_t count)
 471 {
 472         int new_value;
 473         struct bonding *bond = to_bond(d);
 474
 475         if (bond->slave_cnt != 0) {
 476                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 477                        bond->dev->name);
 478                 return -EPERM;
 479         }
 480
 481         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 482         if (new_value < 0) {
 483                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 484                        bond->dev->name, buf);
 485                 return -EINVAL;
 486         }
 487
 488         bond->params.fail_over_mac = new_value;
 489         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 490                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 491                 new_value);
 492
 493         return count;
 494 }
 495
 496 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 497                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 498
 499 /*
 500  * Show and set the arp timer interval.  There are two tricky bits
 501  * here.  First, if ARP monitoring is activated, then we must disable
 502  * MII monitoring.  Second, if the ARP timer isn't running, we must
 503  * start it.
 504  */
 505 static ssize_t bonding_show_arp_interval(struct device *d,
 506                                          struct device_attribute *attr,
 507                                          char *buf)
 508 {
 509         struct bonding *bond = to_bond(d);
 510
 511         return sprintf(buf, "%d\n", bond->params.arp_interval);
 512 }
 513
 514 static ssize_t bonding_store_arp_interval(struct device *d,
 515                                           struct device_attribute *attr,
 516                                           const char *buf, size_t count)
 517 {
 518         int new_value, ret = count;
 519         struct bonding *bond = to_bond(d);
 520
 521         if (!rtnl_trylock())
 522                 return restart_syscall();
 523         if (sscanf(buf, "%d", &new_value) != 1) {
 524                 pr_err("%s: no arp_interval value specified.\n",
 525                        bond->dev->name);
 526                 ret = -EINVAL;
 527                 goto out;
 528         }
 529         if (new_value < 0) {
 530                 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
 531                        bond->dev->name, new_value, INT_MAX);
 532                 ret = -EINVAL;
 533                 goto out;
 534         }
 535         if (bond->params.mode == BOND_MODE_ALB ||
 536             bond->params.mode == BOND_MODE_TLB) {
 537                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 538                         bond->dev->name, bond->dev->name);
 539                 ret = -EINVAL;
 540                 goto out;
 541         }
 542         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 543                 bond->dev->name, new_value);
 544         bond->params.arp_interval = new_value;
 545         if (new_value) {
 546                 if (bond->params.miimon) {
 547                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 548                                 bond->dev->name, bond->dev->name);
 549                         bond->params.miimon = 0;
 550                 }
 551                 if (!bond->params.arp_targets[0])
 552                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 553                                 bond->dev->name);
 554         }
 555         if (bond->dev->flags & IFF_UP) {
 556                 /* If the interface is up, we may need to fire off
 557                  * the ARP timer.  If the interface is down, the
 558                  * timer will get fired off when the open function
 559                  * is called.
 560                  */
 561                 if (!new_value) {
 562                         cancel_delayed_work_sync(&bond->arp_work);
 563                 } else {
 564                         cancel_delayed_work_sync(&bond->mii_work);
 565                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 566                 }
 567         }
 568 out:
 569         rtnl_unlock();
 570         return ret;
 571 }
 572 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 573                    bonding_show_arp_interval, bonding_store_arp_interval);
 574
 575 /*
 576  * Show and set the arp targets.
 577  */
 578 static ssize_t bonding_show_arp_targets(struct device *d,
 579                                         struct device_attribute *attr,
 580                                         char *buf)
 581 {
 582         int i, res = 0;
 583         struct bonding *bond = to_bond(d);
 584
 585         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 586                 if (bond->params.arp_targets[i])
 587                         res += sprintf(buf + res, "%pI4 ",
 588                                        &bond->params.arp_targets[i]);
 589         }
 590         if (res)
 591                 buf[res-1] = '\n'; /* eat the leftover space */
 592         return res;
 593 }
 594
 595 static ssize_t bonding_store_arp_targets(struct device *d,
 596                                          struct device_attribute *attr,
 597                                          const char *buf, size_t count)
 598 {
 599         __be32 newtarget;
 600         int i = 0, done = 0, ret = count;
 601         struct bonding *bond = to_bond(d);
 602         __be32 *targets;
 603
 604         targets = bond->params.arp_targets;
 605         newtarget = in_aton(buf + 1);
 606         /* look for adds */
 607         if (buf[0] == '+') {
 608                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 609                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 610                                bond->dev->name, &newtarget);
 611                         ret = -EINVAL;
 612                         goto out;
 613                 }
 614                 /* look for an empty slot to put the target in, and check for dupes */
 615                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 616                         if (targets[i] == newtarget) { /* duplicate */
 617                                 pr_err("%s: ARP target %pI4 is already present\n",
 618                                        bond->dev->name, &newtarget);
 619                                 ret = -EINVAL;
 620                                 goto out;
 621                         }
 622                         if (targets[i] == 0) {
 623                                 pr_info("%s: adding ARP target %pI4.\n",
 624                                         bond->dev->name, &newtarget);
 625                                 done = 1;
 626                                 targets[i] = newtarget;
 627                         }
 628                 }
 629                 if (!done) {
 630                         pr_err("%s: ARP target table is full!\n",
 631                                bond->dev->name);
 632                         ret = -EINVAL;
 633                         goto out;
 634                 }
 635
 636         } else if (buf[0] == '-')       {
 637                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 638                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 639                                bond->dev->name, &newtarget);
 640                         ret = -EINVAL;
 641                         goto out;
 642                 }
 643
 644                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 645                         if (targets[i] == newtarget) {
 646                                 int j;
 647                                 pr_info("%s: removing ARP target %pI4.\n",
 648                                         bond->dev->name, &newtarget);
 649                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 650                                         targets[j] = targets[j+1];
 651
 652                                 targets[j] = 0;
 653                                 done = 1;
 654                         }
 655                 }
 656                 if (!done) {
 657                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 658                                 bond->dev->name, &newtarget);
 659                         ret = -EINVAL;
 660                         goto out;
 661                 }
 662         } else {
 663                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 664                        bond->dev->name);
 665                 ret = -EPERM;
 666                 goto out;
 667         }
 668
 669 out:
 670         return ret;
 671 }
 672 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 673
 674 /*
 675  * Show and set the up and down delays.  These must be multiples of the
 676  * MII monitoring value, and are stored internally as the multiplier.
 677  * Thus, we must translate to MS for the real world.
 678  */
 679 static ssize_t bonding_show_downdelay(struct device *d,
 680                                       struct device_attribute *attr,
 681                                       char *buf)
 682 {
 683         struct bonding *bond = to_bond(d);
 684
 685         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 686 }
 687
 688 static ssize_t bonding_store_downdelay(struct device *d,
 689                                        struct device_attribute *attr,
 690                                        const char *buf, size_t count)
 691 {
 692         int new_value, ret = count;
 693         struct bonding *bond = to_bond(d);
 694
 695         if (!(bond->params.miimon)) {
 696                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 697                        bond->dev->name);
 698                 ret = -EPERM;
 699                 goto out;
 700         }
 701
 702         if (sscanf(buf, "%d", &new_value) != 1) {
 703                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 704                 ret = -EINVAL;
 705                 goto out;
 706         }
 707         if (new_value < 0) {
 708                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 709                        bond->dev->name, new_value, 0, INT_MAX);
 710                 ret = -EINVAL;
 711                 goto out;
 712         } else {
 713                 if ((new_value % bond->params.miimon) != 0) {
 714                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 715                                    bond->dev->name, new_value,
 716                                    bond->params.miimon,
 717                                    (new_value / bond->params.miimon) *
 718                                    bond->params.miimon);
 719                 }
 720                 bond->params.downdelay = new_value / bond->params.miimon;
 721                 pr_info("%s: Setting down delay to %d.\n",
 722                         bond->dev->name,
 723                         bond->params.downdelay * bond->params.miimon);
 724
 725         }
 726
 727 out:
 728         return ret;
 729 }
 730 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 731                    bonding_show_downdelay, bonding_store_downdelay);
 732
 733 static ssize_t bonding_show_updelay(struct device *d,
 734                                     struct device_attribute *attr,
 735                                     char *buf)
 736 {
 737         struct bonding *bond = to_bond(d);
 738
 739         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 740
 741 }
 742
 743 static ssize_t bonding_store_updelay(struct device *d,
 744                                      struct device_attribute *attr,
 745                                      const char *buf, size_t count)
 746 {
 747         int new_value, ret = count;
 748         struct bonding *bond = to_bond(d);
 749
 750         if (!(bond->params.miimon)) {
 751                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 752                        bond->dev->name);
 753                 ret = -EPERM;
 754                 goto out;
 755         }
 756
 757         if (sscanf(buf, "%d", &new_value) != 1) {
 758                 pr_err("%s: no up delay value specified.\n",
 759                        bond->dev->name);
 760                 ret = -EINVAL;
 761                 goto out;
 762         }
 763         if (new_value < 0) {
 764                 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
 765                        bond->dev->name, new_value, 0, INT_MAX);
 766                 ret = -EINVAL;
 767                 goto out;
 768         } else {
 769                 if ((new_value % bond->params.miimon) != 0) {
 770                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 771                                    bond->dev->name, new_value,
 772                                    bond->params.miimon,
 773                                    (new_value / bond->params.miimon) *
 774                                    bond->params.miimon);
 775                 }
 776                 bond->params.updelay = new_value / bond->params.miimon;
 777                 pr_info("%s: Setting up delay to %d.\n",
 778                         bond->dev->name,
 779                         bond->params.updelay * bond->params.miimon);
 780         }
 781
 782 out:
 783         return ret;
 784 }
 785 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 786                    bonding_show_updelay, bonding_store_updelay);
 787
 788 /*
 789  * Show and set the LACP interval.  Interface must be down, and the mode
 790  * must be set to 802.3ad mode.
 791  */
 792 static ssize_t bonding_show_lacp(struct device *d,
 793                                  struct device_attribute *attr,
 794                                  char *buf)
 795 {
 796         struct bonding *bond = to_bond(d);
 797
 798         return sprintf(buf, "%s %d\n",
 799                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 800                 bond->params.lacp_fast);
 801 }
 802
 803 static ssize_t bonding_store_lacp(struct device *d,
 804                                   struct device_attribute *attr,
 805                                   const char *buf, size_t count)
 806 {
 807         int new_value, ret = count;
 808         struct bonding *bond = to_bond(d);
 809
 810         if (bond->dev->flags & IFF_UP) {
 811                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 812                        bond->dev->name);
 813                 ret = -EPERM;
 814                 goto out;
 815         }
 816
 817         if (bond->params.mode != BOND_MODE_8023AD) {
 818                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 819                        bond->dev->name);
 820                 ret = -EPERM;
 821                 goto out;
 822         }
 823
 824         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 825
 826         if ((new_value == 1) || (new_value == 0)) {
 827                 bond->params.lacp_fast = new_value;
 828                 bond_3ad_update_lacp_rate(bond);
 829                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 830                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 831                         new_value);
 832         } else {
 833                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 834                        bond->dev->name, (int)strlen(buf) - 1, buf);
 835                 ret = -EINVAL;
 836         }
 837 out:
 838         return ret;
 839 }
 840 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 841                    bonding_show_lacp, bonding_store_lacp);
 842
 843 static ssize_t bonding_show_min_links(struct device *d,
 844                                       struct device_attribute *attr,
 845                                       char *buf)
 846 {
 847         struct bonding *bond = to_bond(d);
 848
 849         return sprintf(buf, "%d\n", bond->params.min_links);
 850 }
 851
 852 static ssize_t bonding_store_min_links(struct device *d,
 853                                        struct device_attribute *attr,
 854                                        const char *buf, size_t count)
 855 {
 856         struct bonding *bond = to_bond(d);
 857         int ret;
 858         unsigned int new_value;
 859
 860         ret = kstrtouint(buf, 0, &new_value);
 861         if (ret < 0) {
 862                 pr_err("%s: Ignoring invalid min links value %s.\n",
 863                        bond->dev->name, buf);
 864                 return ret;
 865         }
 866
 867         pr_info("%s: Setting min links value to %u\n",
 868                 bond->dev->name, new_value);
 869         bond->params.min_links = new_value;
 870         return count;
 871 }
 872 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 873                    bonding_show_min_links, bonding_store_min_links);
 874
 875 static ssize_t bonding_show_ad_select(struct device *d,
 876                                       struct device_attribute *attr,
 877                                       char *buf)
 878 {
 879         struct bonding *bond = to_bond(d);
 880
 881         return sprintf(buf, "%s %d\n",
 882                 ad_select_tbl[bond->params.ad_select].modename,
 883                 bond->params.ad_select);
 884 }
 885
 886
 887 static ssize_t bonding_store_ad_select(struct device *d,
 888                                        struct device_attribute *attr,
 889                                        const char *buf, size_t count)
 890 {
 891         int new_value, ret = count;
 892         struct bonding *bond = to_bond(d);
 893
 894         if (bond->dev->flags & IFF_UP) {
 895                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 896                        bond->dev->name);
 897                 ret = -EPERM;
 898                 goto out;
 899         }
 900
 901         new_value = bond_parse_parm(buf, ad_select_tbl);
 902
 903         if (new_value != -1) {
 904                 bond->params.ad_select = new_value;
 905                 pr_info("%s: Setting ad_select to %s (%d).\n",
 906                         bond->dev->name, ad_select_tbl[new_value].modename,
 907                         new_value);
 908         } else {
 909                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 910                        bond->dev->name, (int)strlen(buf) - 1, buf);
 911                 ret = -EINVAL;
 912         }
 913 out:
 914         return ret;
 915 }
 916 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 917                    bonding_show_ad_select, bonding_store_ad_select);
 918
 919 /*
 920  * Show and set the number of peer notifications to send after a failover event.
 921  */
 922 static ssize_t bonding_show_num_peer_notif(struct device *d,
 923                                            struct device_attribute *attr,
 924                                            char *buf)
 925 {
 926         struct bonding *bond = to_bond(d);
 927         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 928 }
 929
 930 static ssize_t bonding_store_num_peer_notif(struct device *d,
 931                                             struct device_attribute *attr,
 932                                             const char *buf, size_t count)
 933 {
 934         struct bonding *bond = to_bond(d);
 935         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 936         return err ? err : count;
 937 }
 938 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 939                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 940 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 941                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 942
 943 /*
 944  * Show and set the MII monitor interval.  There are two tricky bits
 945  * here.  First, if MII monitoring is activated, then we must disable
 946  * ARP monitoring.  Second, if the timer isn't running, we must
 947  * start it.
 948  */
 949 static ssize_t bonding_show_miimon(struct device *d,
 950                                    struct device_attribute *attr,
 951                                    char *buf)
 952 {
 953         struct bonding *bond = to_bond(d);
 954
 955         return sprintf(buf, "%d\n", bond->params.miimon);
 956 }
 957
 958 static ssize_t bonding_store_miimon(struct device *d,
 959                                     struct device_attribute *attr,
 960                                     const char *buf, size_t count)
 961 {
 962         int new_value, ret = count;
 963         struct bonding *bond = to_bond(d);
 964
 965         if (!rtnl_trylock())
 966                 return restart_syscall();
 967         if (sscanf(buf, "%d", &new_value) != 1) {
 968                 pr_err("%s: no miimon value specified.\n",
 969                        bond->dev->name);
 970                 ret = -EINVAL;
 971                 goto out;
 972         }
 973         if (new_value < 0) {
 974                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 975                        bond->dev->name, new_value, 0, INT_MAX);
 976                 ret = -EINVAL;
 977                 goto out;
 978         }
 979         pr_info("%s: Setting MII monitoring interval to %d.\n",
 980                 bond->dev->name, new_value);
 981         bond->params.miimon = new_value;
 982         if (bond->params.updelay)
 983                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 984                         bond->dev->name,
 985                         bond->params.updelay * bond->params.miimon);
 986         if (bond->params.downdelay)
 987                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 988                         bond->dev->name,
 989                         bond->params.downdelay * bond->params.miimon);
 990         if (new_value && bond->params.arp_interval) {
 991                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 992                         bond->dev->name);
 993                 bond->params.arp_interval = 0;
 994                 if (bond->params.arp_validate)
 995                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 996         }
 997         if (bond->dev->flags & IFF_UP) {
 998                 /* If the interface is up, we may need to fire off
 999                  * the MII timer. If the interface is down, the
1000                  * timer will get fired off when the open function
1001                  * is called.
1002                  */
1003                 if (!new_value) {
1004                         cancel_delayed_work_sync(&bond->mii_work);
1005                 } else {
1006                         cancel_delayed_work_sync(&bond->arp_work);
1007                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1008                 }
1009         }
1010 out:
1011         rtnl_unlock();
1012         return ret;
1013 }
1014 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1015                    bonding_show_miimon, bonding_store_miimon);
1016
1017 /*
1018  * Show and set the primary slave.  The store function is much
1019  * simpler than bonding_store_slaves function because it only needs to
1020  * handle one interface name.
1021  * The bond must be a mode that supports a primary for this be
1022  * set.
1023  */
1024 static ssize_t bonding_show_primary(struct device *d,
1025                                     struct device_attribute *attr,
1026                                     char *buf)
1027 {
1028         int count = 0;
1029         struct bonding *bond = to_bond(d);
1030
1031         if (bond->primary_slave)
1032                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1033
1034         return count;
1035 }
1036
1037 static ssize_t bonding_store_primary(struct device *d,
1038                                      struct device_attribute *attr,
1039                                      const char *buf, size_t count)
1040 {
1041         int i;
1042         struct slave *slave;
1043         struct bonding *bond = to_bond(d);
1044         char ifname[IFNAMSIZ];
1045
1046         if (!rtnl_trylock())
1047                 return restart_syscall();
1048         block_netpoll_tx();
1049         read_lock(&bond->lock);
1050         write_lock_bh(&bond->curr_slave_lock);
1051
1052         if (!USES_PRIMARY(bond->params.mode)) {
1053                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1054                         bond->dev->name, bond->dev->name, bond->params.mode);
1055                 goto out;
1056         }
1057
1058         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1059
1060         /* check to see if we are clearing primary */
1061         if (!strlen(ifname) || buf[0] == '\n') {
1062                 pr_info("%s: Setting primary slave to None.\n",
1063                         bond->dev->name);
1064                 bond->primary_slave = NULL;
1065                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1066                 bond_select_active_slave(bond);
1067                 goto out;
1068         }
1069
1070         bond_for_each_slave(bond, slave, i) {
1071                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1072                         pr_info("%s: Setting %s as primary slave.\n",
1073                                 bond->dev->name, slave->dev->name);
1074                         bond->primary_slave = slave;
1075                         strcpy(bond->params.primary, slave->dev->name);
1076                         bond_select_active_slave(bond);
1077                         goto out;
1078                 }
1079         }
1080
1081         strncpy(bond->params.primary, ifname, IFNAMSIZ);
1082         bond->params.primary[IFNAMSIZ - 1] = 0;
1083
1084         pr_info("%s: Recording %s as primary, "
1085                 "but it has not been enslaved to %s yet.\n",
1086                 bond->dev->name, ifname, bond->dev->name);
1087 out:
1088         write_unlock_bh(&bond->curr_slave_lock);
1089         read_unlock(&bond->lock);
1090         unblock_netpoll_tx();
1091         rtnl_unlock();
1092
1093         return count;
1094 }
1095 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1096                    bonding_show_primary, bonding_store_primary);
1097
1098 /*
1099  * Show and set the primary_reselect flag.
1100  */
1101 static ssize_t bonding_show_primary_reselect(struct device *d,
1102                                              struct device_attribute *attr,
1103                                              char *buf)
1104 {
1105         struct bonding *bond = to_bond(d);
1106
1107         return sprintf(buf, "%s %d\n",
1108                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1109                        bond->params.primary_reselect);
1110 }
1111
1112 static ssize_t bonding_store_primary_reselect(struct device *d,
1113                                               struct device_attribute *attr,
1114                                               const char *buf, size_t count)
1115 {
1116         int new_value, ret = count;
1117         struct bonding *bond = to_bond(d);
1118
1119         if (!rtnl_trylock())
1120                 return restart_syscall();
1121
1122         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1123         if (new_value < 0)  {
1124                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1125                        bond->dev->name,
1126                        (int) strlen(buf) - 1, buf);
1127                 ret = -EINVAL;
1128                 goto out;
1129         }
1130
1131         bond->params.primary_reselect = new_value;
1132         pr_info("%s: setting primary_reselect to %s (%d).\n",
1133                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1134                 new_value);
1135
1136         block_netpoll_tx();
1137         read_lock(&bond->lock);
1138         write_lock_bh(&bond->curr_slave_lock);
1139         bond_select_active_slave(bond);
1140         write_unlock_bh(&bond->curr_slave_lock);
1141         read_unlock(&bond->lock);
1142         unblock_netpoll_tx();
1143 out:
1144         rtnl_unlock();
1145         return ret;
1146 }
1147 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1148                    bonding_show_primary_reselect,
1149                    bonding_store_primary_reselect);
1150
1151 /*
1152  * Show and set the use_carrier flag.
1153  */
1154 static ssize_t bonding_show_carrier(struct device *d,
1155                                     struct device_attribute *attr,
1156                                     char *buf)
1157 {
1158         struct bonding *bond = to_bond(d);
1159
1160         return sprintf(buf, "%d\n", bond->params.use_carrier);
1161 }
1162
1163 static ssize_t bonding_store_carrier(struct device *d,
1164                                      struct device_attribute *attr,
1165                                      const char *buf, size_t count)
1166 {
1167         int new_value, ret = count;
1168         struct bonding *bond = to_bond(d);
1169
1170
1171         if (sscanf(buf, "%d", &new_value) != 1) {
1172                 pr_err("%s: no use_carrier value specified.\n",
1173                        bond->dev->name);
1174                 ret = -EINVAL;
1175                 goto out;
1176         }
1177         if ((new_value == 0) || (new_value == 1)) {
1178                 bond->params.use_carrier = new_value;
1179                 pr_info("%s: Setting use_carrier to %d.\n",
1180                         bond->dev->name, new_value);
1181         } else {
1182                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1183                         bond->dev->name, new_value);
1184         }
1185 out:
1186         return ret;
1187 }
1188 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1189                    bonding_show_carrier, bonding_store_carrier);
1190
1191
1192 /*
1193  * Show and set currently active_slave.
1194  */
1195 static ssize_t bonding_show_active_slave(struct device *d,
1196                                          struct device_attribute *attr,
1197                                          char *buf)
1198 {
1199         struct slave *curr;
1200         struct bonding *bond = to_bond(d);
1201         int count = 0;
1202
1203         read_lock(&bond->curr_slave_lock);
1204         curr = bond->curr_active_slave;
1205         read_unlock(&bond->curr_slave_lock);
1206
1207         if (USES_PRIMARY(bond->params.mode) && curr)
1208                 count = sprintf(buf, "%s\n", curr->dev->name);
1209         return count;
1210 }
1211
1212 static ssize_t bonding_store_active_slave(struct device *d,
1213                                           struct device_attribute *attr,
1214                                           const char *buf, size_t count)
1215 {
1216         int i;
1217         struct slave *slave;
1218         struct slave *old_active = NULL;
1219         struct slave *new_active = NULL;
1220         struct bonding *bond = to_bond(d);
1221         char ifname[IFNAMSIZ];
1222
1223         if (!rtnl_trylock())
1224                 return restart_syscall();
1225
1226         block_netpoll_tx();
1227         read_lock(&bond->lock);
1228         write_lock_bh(&bond->curr_slave_lock);
1229
1230         if (!USES_PRIMARY(bond->params.mode)) {
1231                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1232                         bond->dev->name, bond->dev->name, bond->params.mode);
1233                 goto out;
1234         }
1235
1236         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1237
1238         /* check to see if we are clearing active */
1239         if (!strlen(ifname) || buf[0] == '\n') {
1240                 pr_info("%s: Clearing current active slave.\n",
1241                         bond->dev->name);
1242                 bond->curr_active_slave = NULL;
1243                 bond_select_active_slave(bond);
1244                 goto out;
1245         }
1246
1247         bond_for_each_slave(bond, slave, i) {
1248                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1249                         old_active = bond->curr_active_slave;
1250                         new_active = slave;
1251                         if (new_active == old_active) {
1252                                 /* do nothing */
1253                                 pr_info("%s: %s is already the current"
1254                                         " active slave.\n",
1255                                         bond->dev->name,
1256                                         slave->dev->name);
1257                                 goto out;
1258                         }
1259                         else {
1260                                 if ((new_active) &&
1261                                     (old_active) &&
1262                                     (new_active->link == BOND_LINK_UP) &&
1263                                     IS_UP(new_active->dev)) {
1264                                         pr_info("%s: Setting %s as active"
1265                                                 " slave.\n",
1266                                                 bond->dev->name,
1267                                                 slave->dev->name);
1268                                         bond_change_active_slave(bond,
1269                                                                  new_active);
1270                                 }
1271                                 else {
1272                                         pr_info("%s: Could not set %s as"
1273                                                 " active slave; either %s is"
1274                                                 " down or the link is down.\n",
1275                                                 bond->dev->name,
1276                                                 slave->dev->name,
1277                                                 slave->dev->name);
1278                                 }
1279                                 goto out;
1280                         }
1281                 }
1282         }
1283
1284         pr_info("%s: Unable to set %.*s as active slave.\n",
1285                 bond->dev->name, (int)strlen(buf) - 1, buf);
1286  out:
1287         write_unlock_bh(&bond->curr_slave_lock);
1288         read_unlock(&bond->lock);
1289         unblock_netpoll_tx();
1290
1291         rtnl_unlock();
1292
1293         return count;
1294
1295 }
1296 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1297                    bonding_show_active_slave, bonding_store_active_slave);
1298
1299
1300 /*
1301  * Show link status of the bond interface.
1302  */
1303 static ssize_t bonding_show_mii_status(struct device *d,
1304                                        struct device_attribute *attr,
1305                                        char *buf)
1306 {
1307         struct slave *curr;
1308         struct bonding *bond = to_bond(d);
1309
1310         read_lock(&bond->curr_slave_lock);
1311         curr = bond->curr_active_slave;
1312         read_unlock(&bond->curr_slave_lock);
1313
1314         return sprintf(buf, "%s\n", curr ? "up" : "down");
1315 }
1316 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1317
1318
1319 /*
1320  * Show current 802.3ad aggregator ID.
1321  */
1322 static ssize_t bonding_show_ad_aggregator(struct device *d,
1323                                           struct device_attribute *attr,
1324                                           char *buf)
1325 {
1326         int count = 0;
1327         struct bonding *bond = to_bond(d);
1328
1329         if (bond->params.mode == BOND_MODE_8023AD) {
1330                 struct ad_info ad_info;
1331                 count = sprintf(buf, "%d\n",
1332                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1333                                 ?  0 : ad_info.aggregator_id);
1334         }
1335
1336         return count;
1337 }
1338 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1339
1340
1341 /*
1342  * Show number of active 802.3ad ports.
1343  */
1344 static ssize_t bonding_show_ad_num_ports(struct device *d,
1345                                          struct device_attribute *attr,
1346                                          char *buf)
1347 {
1348         int count = 0;
1349         struct bonding *bond = to_bond(d);
1350
1351         if (bond->params.mode == BOND_MODE_8023AD) {
1352                 struct ad_info ad_info;
1353                 count = sprintf(buf, "%d\n",
1354                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1355                                 ?  0 : ad_info.ports);
1356         }
1357
1358         return count;
1359 }
1360 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1361
1362
1363 /*
1364  * Show current 802.3ad actor key.
1365  */
1366 static ssize_t bonding_show_ad_actor_key(struct device *d,
1367                                          struct device_attribute *attr,
1368                                          char *buf)
1369 {
1370         int count = 0;
1371         struct bonding *bond = to_bond(d);
1372
1373         if (bond->params.mode == BOND_MODE_8023AD) {
1374                 struct ad_info ad_info;
1375                 count = sprintf(buf, "%d\n",
1376                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1377                                 ?  0 : ad_info.actor_key);
1378         }
1379
1380         return count;
1381 }
1382 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1383
1384
1385 /*
1386  * Show current 802.3ad partner key.
1387  */
1388 static ssize_t bonding_show_ad_partner_key(struct device *d,
1389                                            struct device_attribute *attr,
1390                                            char *buf)
1391 {
1392         int count = 0;
1393         struct bonding *bond = to_bond(d);
1394
1395         if (bond->params.mode == BOND_MODE_8023AD) {
1396                 struct ad_info ad_info;
1397                 count = sprintf(buf, "%d\n",
1398                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1399                                 ?  0 : ad_info.partner_key);
1400         }
1401
1402         return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1405
1406
1407 /*
1408  * Show current 802.3ad partner mac.
1409  */
1410 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1411                                            struct device_attribute *attr,
1412                                            char *buf)
1413 {
1414         int count = 0;
1415         struct bonding *bond = to_bond(d);
1416
1417         if (bond->params.mode == BOND_MODE_8023AD) {
1418                 struct ad_info ad_info;
1419                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1420                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1421         }
1422
1423         return count;
1424 }
1425 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1426
1427 /*
1428  * Show the queue_ids of the slaves in the current bond.
1429  */
1430 static ssize_t bonding_show_queue_id(struct device *d,
1431                                      struct device_attribute *attr,
1432                                      char *buf)
1433 {
1434         struct slave *slave;
1435         int i, res = 0;
1436         struct bonding *bond = to_bond(d);
1437
1438         if (!rtnl_trylock())
1439                 return restart_syscall();
1440
1441         read_lock(&bond->lock);
1442         bond_for_each_slave(bond, slave, i) {
1443                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1444                         /* not enough space for another interface_name:queue_id pair */
1445                         if ((PAGE_SIZE - res) > 10)
1446                                 res = PAGE_SIZE - 10;
1447                         res += sprintf(buf + res, "++more++ ");
1448                         break;
1449                 }
1450                 res += sprintf(buf + res, "%s:%d ",
1451                                slave->dev->name, slave->queue_id);
1452         }
1453         read_unlock(&bond->lock);
1454         if (res)
1455                 buf[res-1] = '\n'; /* eat the leftover space */
1456         rtnl_unlock();
1457         return res;
1458 }
1459
1460 /*
1461  * Set the queue_ids of the  slaves in the current bond.  The bond
1462  * interface must be enslaved for this to work.
1463  */
1464 static ssize_t bonding_store_queue_id(struct device *d,
1465                                       struct device_attribute *attr,
1466                                       const char *buffer, size_t count)
1467 {
1468         struct slave *slave, *update_slave;
1469         struct bonding *bond = to_bond(d);
1470         u16 qid;
1471         int i, ret = count;
1472         char *delim;
1473         struct net_device *sdev = NULL;
1474
1475         if (!rtnl_trylock())
1476                 return restart_syscall();
1477
1478         /* delim will point to queue id if successful */
1479         delim = strchr(buffer, ':');
1480         if (!delim)
1481                 goto err_no_cmd;
1482
1483         /*
1484          * Terminate string that points to device name and bump it
1485          * up one, so we can read the queue id there.
1486          */
1487         *delim = '\0';
1488         if (sscanf(++delim, "%hd\n", &qid) != 1)
1489                 goto err_no_cmd;
1490
1491         /* Check buffer length, valid ifname and queue id */
1492         if (strlen(buffer) > IFNAMSIZ ||
1493             !dev_valid_name(buffer) ||
1494             qid > bond->dev->real_num_tx_queues)
1495                 goto err_no_cmd;
1496
1497         /* Get the pointer to that interface if it exists */
1498         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1499         if (!sdev)
1500                 goto err_no_cmd;
1501
1502         read_lock(&bond->lock);
1503
1504         /* Search for thes slave and check for duplicate qids */
1505         update_slave = NULL;
1506         bond_for_each_slave(bond, slave, i) {
1507                 if (sdev == slave->dev)
1508                         /*
1509                          * We don't need to check the matching
1510                          * slave for dups, since we're overwriting it
1511                          */
1512                         update_slave = slave;
1513                 else if (qid && qid == slave->queue_id) {
1514                         goto err_no_cmd_unlock;
1515                 }
1516         }
1517
1518         if (!update_slave)
1519                 goto err_no_cmd_unlock;
1520
1521         /* Actually set the qids for the slave */
1522         update_slave->queue_id = qid;
1523
1524         read_unlock(&bond->lock);
1525 out:
1526         rtnl_unlock();
1527         return ret;
1528
1529 err_no_cmd_unlock:
1530         read_unlock(&bond->lock);
1531 err_no_cmd:
1532         pr_info("invalid input for queue_id set for %s.\n",
1533                 bond->dev->name);
1534         ret = -EPERM;
1535         goto out;
1536 }
1537
1538 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1539                    bonding_store_queue_id);
1540
1541
1542 /*
1543  * Show and set the all_slaves_active flag.
1544  */
1545 static ssize_t bonding_show_slaves_active(struct device *d,
1546                                           struct device_attribute *attr,
1547                                           char *buf)
1548 {
1549         struct bonding *bond = to_bond(d);
1550
1551         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1552 }
1553
1554 static ssize_t bonding_store_slaves_active(struct device *d,
1555                                            struct device_attribute *attr,
1556                                            const char *buf, size_t count)
1557 {
1558         int i, new_value, ret = count;
1559         struct bonding *bond = to_bond(d);
1560         struct slave *slave;
1561
1562         if (sscanf(buf, "%d", &new_value) != 1) {
1563                 pr_err("%s: no all_slaves_active value specified.\n",
1564                        bond->dev->name);
1565                 ret = -EINVAL;
1566                 goto out;
1567         }
1568
1569         if (new_value == bond->params.all_slaves_active)
1570                 goto out;
1571
1572         if ((new_value == 0) || (new_value == 1)) {
1573                 bond->params.all_slaves_active = new_value;
1574         } else {
1575                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1576                         bond->dev->name, new_value);
1577                 ret = -EINVAL;
1578                 goto out;
1579         }
1580
1581         read_lock(&bond->lock);
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         read_unlock(&bond->lock);
1591 out:
1592         return ret;
1593 }
1594 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1595                    bonding_show_slaves_active, bonding_store_slaves_active);
1596
1597 /*
1598  * Show and set the number of IGMP membership reports to send on link failure
1599  */
1600 static ssize_t bonding_show_resend_igmp(struct device *d,
1601                                         struct device_attribute *attr,
1602                                         char *buf)
1603 {
1604         struct bonding *bond = to_bond(d);
1605
1606         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1607 }
1608
1609 static ssize_t bonding_store_resend_igmp(struct device *d,
1610                                          struct device_attribute *attr,
1611                                          const char *buf, size_t count)
1612 {
1613         int new_value, ret = count;
1614         struct bonding *bond = to_bond(d);
1615
1616         if (sscanf(buf, "%d", &new_value) != 1) {
1617                 pr_err("%s: no resend_igmp value specified.\n",
1618                        bond->dev->name);
1619                 ret = -EINVAL;
1620                 goto out;
1621         }
1622
1623         if (new_value < 0 || new_value > 255) {
1624                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1625                        bond->dev->name, new_value);
1626                 ret = -EINVAL;
1627                 goto out;
1628         }
1629
1630         pr_info("%s: Setting resend_igmp to %d.\n",
1631                 bond->dev->name, new_value);
1632         bond->params.resend_igmp = new_value;
1633 out:
1634         return ret;
1635 }
1636
1637 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1638                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1639
1640 static struct attribute *per_bond_attrs[] = {
1641         &dev_attr_slaves.attr,
1642         &dev_attr_mode.attr,
1643         &dev_attr_fail_over_mac.attr,
1644         &dev_attr_arp_validate.attr,
1645         &dev_attr_arp_interval.attr,
1646         &dev_attr_arp_ip_target.attr,
1647         &dev_attr_downdelay.attr,
1648         &dev_attr_updelay.attr,
1649         &dev_attr_lacp_rate.attr,
1650         &dev_attr_ad_select.attr,
1651         &dev_attr_xmit_hash_policy.attr,
1652         &dev_attr_num_grat_arp.attr,
1653         &dev_attr_num_unsol_na.attr,
1654         &dev_attr_miimon.attr,
1655         &dev_attr_primary.attr,
1656         &dev_attr_primary_reselect.attr,
1657         &dev_attr_use_carrier.attr,
1658         &dev_attr_active_slave.attr,
1659         &dev_attr_mii_status.attr,
1660         &dev_attr_ad_aggregator.attr,
1661         &dev_attr_ad_num_ports.attr,
1662         &dev_attr_ad_actor_key.attr,
1663         &dev_attr_ad_partner_key.attr,
1664         &dev_attr_ad_partner_mac.attr,
1665         &dev_attr_queue_id.attr,
1666         &dev_attr_all_slaves_active.attr,
1667         &dev_attr_resend_igmp.attr,
1668         &dev_attr_min_links.attr,
1669         NULL,
1670 };
1671
1672 static struct attribute_group bonding_group = {
1673         .name = "bonding",
1674         .attrs = per_bond_attrs,
1675 };
1676
1677 /*
1678  * Initialize sysfs.  This sets up the bonding_masters file in
1679  * /sys/class/net.
1680  */
1681 int bond_create_sysfs(struct bond_net *bn)
1682 {
1683         int ret;
1684
1685         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1686         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1687
1688         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1689         /*
1690          * Permit multiple loads of the module by ignoring failures to
1691          * create the bonding_masters sysfs file.  Bonding devices
1692          * created by second or subsequent loads of the module will
1693          * not be listed in, or controllable by, bonding_masters, but
1694          * will have the usual "bonding" sysfs directory.
1695          *
1696          * This is done to preserve backwards compatibility for
1697          * initscripts/sysconfig, which load bonding multiple times to
1698          * configure multiple bonding devices.
1699          */
1700         if (ret == -EEXIST) {
1701                 /* Is someone being kinky and naming a device bonding_master? */
1702                 if (__dev_get_by_name(bn->net,
1703                                       class_attr_bonding_masters.attr.name))
1704                         pr_err("network device named %s already exists in sysfs",
1705                                class_attr_bonding_masters.attr.name);
1706                 ret = 0;
1707         }
1708
1709         return ret;
1710
1711 }
1712
1713 /*
1714  * Remove /sys/class/net/bonding_masters.
1715  */
1716 void bond_destroy_sysfs(struct bond_net *bn)
1717 {
1718         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1719 }
1720
1721 /*
1722  * Initialize sysfs for each bond.  This sets up and registers
1723  * the 'bondctl' directory for each individual bond under /sys/class/net.
1724  */
1725 void bond_prepare_sysfs_group(struct bonding *bond)
1726 {
1727         bond->dev->sysfs_groups[0] = &bonding_group;
1728 }
1729