Pileus Git - ~andy/linux/blob - 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 #include <linux/reciprocal_div.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 /*
 173  * Show the slaves in the current bond.
 174  */
 175 static ssize_t bonding_show_slaves(struct device *d,
 176                                    struct device_attribute *attr, char *buf)
 177 {
 178         struct bonding *bond = to_bond(d);
 179         struct list_head *iter;
 180         struct slave *slave;
 181         int res = 0;
 182
 183         if (!rtnl_trylock())
 184                 return restart_syscall();
 185
 186         bond_for_each_slave(bond, slave, iter) {
 187                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 188                         /* not enough space for another interface name */
 189                         if ((PAGE_SIZE - res) > 10)
 190                                 res = PAGE_SIZE - 10;
 191                         res += sprintf(buf + res, "++more++ ");
 192                         break;
 193                 }
 194                 res += sprintf(buf + res, "%s ", slave->dev->name);
 195         }
 196
 197         rtnl_unlock();
 198
 199         if (res)
 200                 buf[res-1] = '\n'; /* eat the leftover space */
 201
 202         return res;
 203 }
 204
 205 /*
 206  * Set the slaves in the current bond.
 207  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 208  * All hard work should be done there.
 209  */
 210 static ssize_t bonding_store_slaves(struct device *d,
 211                                     struct device_attribute *attr,
 212                                     const char *buffer, size_t count)
 213 {
 214         char command[IFNAMSIZ + 1] = { 0, };
 215         char *ifname;
 216         int res, ret = count;
 217         struct net_device *dev;
 218         struct bonding *bond = to_bond(d);
 219
 220         if (!rtnl_trylock())
 221                 return restart_syscall();
 222
 223         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 224         ifname = command + 1;
 225         if ((strlen(command) <= 1) ||
 226             !dev_valid_name(ifname))
 227                 goto err_no_cmd;
 228
 229         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 230         if (!dev) {
 231                 pr_info("%s: Interface %s does not exist!\n",
 232                         bond->dev->name, ifname);
 233                 ret = -ENODEV;
 234                 goto out;
 235         }
 236
 237         switch (command[0]) {
 238         case '+':
 239                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 240                 res = bond_enslave(bond->dev, dev);
 241                 break;
 242
 243         case '-':
 244                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 245                 res = bond_release(bond->dev, dev);
 246                 break;
 247
 248         default:
 249                 goto err_no_cmd;
 250         }
 251
 252         if (res)
 253                 ret = res;
 254         goto out;
 255
 256 err_no_cmd:
 257         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 258                bond->dev->name);
 259         ret = -EPERM;
 260
 261 out:
 262         rtnl_unlock();
 263         return ret;
 264 }
 265
 266 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 267                    bonding_store_slaves);
 268
 269 /*
 270  * Show and set the bonding mode.  The bond interface must be down to
 271  * change the mode.
 272  */
 273 static ssize_t bonding_show_mode(struct device *d,
 274                                  struct device_attribute *attr, char *buf)
 275 {
 276         struct bonding *bond = to_bond(d);
 277
 278         return sprintf(buf, "%s %d\n",
 279                         bond_mode_tbl[bond->params.mode].modename,
 280                         bond->params.mode);
 281 }
 282
 283 static ssize_t bonding_store_mode(struct device *d,
 284                                   struct device_attribute *attr,
 285                                   const char *buf, size_t count)
 286 {
 287         int new_value, ret;
 288         struct bonding *bond = to_bond(d);
 289
 290         new_value = bond_parse_parm(buf, bond_mode_tbl);
 291         if (new_value < 0)  {
 292                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 293                        bond->dev->name, (int)strlen(buf) - 1, buf);
 294                 return -EINVAL;
 295         }
 296         if (!rtnl_trylock())
 297                 return restart_syscall();
 298
 299         ret = bond_option_mode_set(bond, new_value);
 300         if (!ret) {
 301                 pr_info("%s: setting mode to %s (%d).\n",
 302                         bond->dev->name, bond_mode_tbl[new_value].modename,
 303                         new_value);
 304                 ret = count;
 305         }
 306
 307         rtnl_unlock();
 308         return ret;
 309 }
 310 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 311                    bonding_show_mode, bonding_store_mode);
 312
 313 /*
 314  * Show and set the bonding transmit hash method.
 315  */
 316 static ssize_t bonding_show_xmit_hash(struct device *d,
 317                                       struct device_attribute *attr,
 318                                       char *buf)
 319 {
 320         struct bonding *bond = to_bond(d);
 321
 322         return sprintf(buf, "%s %d\n",
 323                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 324                        bond->params.xmit_policy);
 325 }
 326
 327 static ssize_t bonding_store_xmit_hash(struct device *d,
 328                                        struct device_attribute *attr,
 329                                        const char *buf, size_t count)
 330 {
 331         int new_value, ret = count;
 332         struct bonding *bond = to_bond(d);
 333
 334         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 335         if (new_value < 0)  {
 336                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 337                        bond->dev->name,
 338                        (int)strlen(buf) - 1, buf);
 339                 ret = -EINVAL;
 340         } else {
 341                 bond->params.xmit_policy = new_value;
 342                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 343                         bond->dev->name,
 344                         xmit_hashtype_tbl[new_value].modename, new_value);
 345         }
 346
 347         return ret;
 348 }
 349 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 350                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 351
 352 /*
 353  * Show and set arp_validate.
 354  */
 355 static ssize_t bonding_show_arp_validate(struct device *d,
 356                                          struct device_attribute *attr,
 357                                          char *buf)
 358 {
 359         struct bonding *bond = to_bond(d);
 360
 361         return sprintf(buf, "%s %d\n",
 362                        arp_validate_tbl[bond->params.arp_validate].modename,
 363                        bond->params.arp_validate);
 364 }
 365
 366 static ssize_t bonding_store_arp_validate(struct device *d,
 367                                           struct device_attribute *attr,
 368                                           const char *buf, size_t count)
 369 {
 370         struct bonding *bond = to_bond(d);
 371         int new_value, ret = count;
 372
 373         if (!rtnl_trylock())
 374                 return restart_syscall();
 375         new_value = bond_parse_parm(buf, arp_validate_tbl);
 376         if (new_value < 0) {
 377                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 378                        bond->dev->name, buf);
 379                 ret = -EINVAL;
 380                 goto out;
 381         }
 382         if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
 383                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 384                        bond->dev->name);
 385                 ret = -EINVAL;
 386                 goto out;
 387         }
 388         pr_info("%s: setting arp_validate to %s (%d).\n",
 389                 bond->dev->name, arp_validate_tbl[new_value].modename,
 390                 new_value);
 391
 392         if (bond->dev->flags & IFF_UP) {
 393                 if (!new_value)
 394                         bond->recv_probe = NULL;
 395                 else if (bond->params.arp_interval)
 396                         bond->recv_probe = bond_arp_rcv;
 397         }
 398         bond->params.arp_validate = new_value;
 399 out:
 400         rtnl_unlock();
 401
 402         return ret;
 403 }
 404
 405 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 406                    bonding_store_arp_validate);
 407 /*
 408  * Show and set arp_all_targets.
 409  */
 410 static ssize_t bonding_show_arp_all_targets(struct device *d,
 411                                          struct device_attribute *attr,
 412                                          char *buf)
 413 {
 414         struct bonding *bond = to_bond(d);
 415         int value = bond->params.arp_all_targets;
 416
 417         return sprintf(buf, "%s %d\n", arp_all_targets_tbl[value].modename,
 418                        value);
 419 }
 420
 421 static ssize_t bonding_store_arp_all_targets(struct device *d,
 422                                           struct device_attribute *attr,
 423                                           const char *buf, size_t count)
 424 {
 425         struct bonding *bond = to_bond(d);
 426         int new_value;
 427
 428         new_value = bond_parse_parm(buf, arp_all_targets_tbl);
 429         if (new_value < 0) {
 430                 pr_err("%s: Ignoring invalid arp_all_targets value %s\n",
 431                        bond->dev->name, buf);
 432                 return -EINVAL;
 433         }
 434         pr_info("%s: setting arp_all_targets to %s (%d).\n",
 435                 bond->dev->name, arp_all_targets_tbl[new_value].modename,
 436                 new_value);
 437
 438         bond->params.arp_all_targets = new_value;
 439
 440         return count;
 441 }
 442
 443 static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
 444                    bonding_show_arp_all_targets, bonding_store_arp_all_targets);
 445
 446 /*
 447  * Show and store fail_over_mac.  User only allowed to change the
 448  * value when there are no slaves.
 449  */
 450 static ssize_t bonding_show_fail_over_mac(struct device *d,
 451                                           struct device_attribute *attr,
 452                                           char *buf)
 453 {
 454         struct bonding *bond = to_bond(d);
 455
 456         return sprintf(buf, "%s %d\n",
 457                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 458                        bond->params.fail_over_mac);
 459 }
 460
 461 static ssize_t bonding_store_fail_over_mac(struct device *d,
 462                                            struct device_attribute *attr,
 463                                            const char *buf, size_t count)
 464 {
 465         int new_value, ret = count;
 466         struct bonding *bond = to_bond(d);
 467
 468         if (!rtnl_trylock())
 469                 return restart_syscall();
 470
 471         if (bond_has_slaves(bond)) {
 472                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 473                        bond->dev->name);
 474                 ret = -EPERM;
 475                 goto out;
 476         }
 477
 478         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 479         if (new_value < 0) {
 480                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 481                        bond->dev->name, buf);
 482                 ret = -EINVAL;
 483                 goto out;
 484         }
 485
 486         bond->params.fail_over_mac = new_value;
 487         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 488                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 489                 new_value);
 490
 491 out:
 492         rtnl_unlock();
 493         return ret;
 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         struct bonding *bond = to_bond(d);
 519         int new_value, ret = count;
 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                         if (bond->params.arp_validate)
 563                                 bond->recv_probe = NULL;
 564                         cancel_delayed_work_sync(&bond->arp_work);
 565                 } else {
 566                         /* arp_validate can be set only in active-backup mode */
 567                         if (bond->params.arp_validate)
 568                                 bond->recv_probe = bond_arp_rcv;
 569                         cancel_delayed_work_sync(&bond->mii_work);
 570                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 571                 }
 572         }
 573 out:
 574         rtnl_unlock();
 575         return ret;
 576 }
 577 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 578                    bonding_show_arp_interval, bonding_store_arp_interval);
 579
 580 /*
 581  * Show and set the arp targets.
 582  */
 583 static ssize_t bonding_show_arp_targets(struct device *d,
 584                                         struct device_attribute *attr,
 585                                         char *buf)
 586 {
 587         int i, res = 0;
 588         struct bonding *bond = to_bond(d);
 589
 590         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 591                 if (bond->params.arp_targets[i])
 592                         res += sprintf(buf + res, "%pI4 ",
 593                                        &bond->params.arp_targets[i]);
 594         }
 595         if (res)
 596                 buf[res-1] = '\n'; /* eat the leftover space */
 597         return res;
 598 }
 599
 600 static ssize_t bonding_store_arp_targets(struct device *d,
 601                                          struct device_attribute *attr,
 602                                          const char *buf, size_t count)
 603 {
 604         struct bonding *bond = to_bond(d);
 605         struct list_head *iter;
 606         struct slave *slave;
 607         __be32 newtarget, *targets;
 608         unsigned long *targets_rx;
 609         int ind, i, j, ret = -EINVAL;
 610
 611         if (!rtnl_trylock())
 612                 return restart_syscall();
 613
 614         targets = bond->params.arp_targets;
 615         newtarget = in_aton(buf + 1);
 616         /* look for adds */
 617         if (buf[0] == '+') {
 618                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 619                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 620                                bond->dev->name, &newtarget);
 621                         goto out;
 622                 }
 623
 624                 if (bond_get_targets_ip(targets, newtarget) != -1) { /* dup */
 625                         pr_err("%s: ARP target %pI4 is already present\n",
 626                                bond->dev->name, &newtarget);
 627                         goto out;
 628                 }
 629
 630                 ind = bond_get_targets_ip(targets, 0); /* first free slot */
 631                 if (ind == -1) {
 632                         pr_err("%s: ARP target table is full!\n",
 633                                bond->dev->name);
 634                         goto out;
 635                 }
 636
 637                 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name,
 638                          &newtarget);
 639                 /* not to race with bond_arp_rcv */
 640                 write_lock_bh(&bond->lock);
 641                 bond_for_each_slave(bond, slave, iter)
 642                         slave->target_last_arp_rx[ind] = jiffies;
 643                 targets[ind] = newtarget;
 644                 write_unlock_bh(&bond->lock);
 645         } else if (buf[0] == '-')       {
 646                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 647                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 648                                bond->dev->name, &newtarget);
 649                         goto out;
 650                 }
 651
 652                 ind = bond_get_targets_ip(targets, newtarget);
 653                 if (ind == -1) {
 654                         pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
 655                                 bond->dev->name, &newtarget);
 656                         goto out;
 657                 }
 658
 659                 if (ind == 0 && !targets[1] && bond->params.arp_interval)
 660                         pr_warn("%s: removing last arp target with arp_interval on\n",
 661                                 bond->dev->name);
 662
 663                 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
 664                         &newtarget);
 665
 666                 write_lock_bh(&bond->lock);
 667                 bond_for_each_slave(bond, slave, iter) {
 668                         targets_rx = slave->target_last_arp_rx;
 669                         j = ind;
 670                         for (; (j < BOND_MAX_ARP_TARGETS-1) && targets[j+1]; j++)
 671                                 targets_rx[j] = targets_rx[j+1];
 672                         targets_rx[j] = 0;
 673                 }
 674                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 675                         targets[i] = targets[i+1];
 676                 targets[i] = 0;
 677                 write_unlock_bh(&bond->lock);
 678         } else {
 679                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 680                        bond->dev->name);
 681                 ret = -EPERM;
 682                 goto out;
 683         }
 684
 685         ret = count;
 686 out:
 687         rtnl_unlock();
 688         return ret;
 689 }
 690 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 691
 692 /*
 693  * Show and set the up and down delays.  These must be multiples of the
 694  * MII monitoring value, and are stored internally as the multiplier.
 695  * Thus, we must translate to MS for the real world.
 696  */
 697 static ssize_t bonding_show_downdelay(struct device *d,
 698                                       struct device_attribute *attr,
 699                                       char *buf)
 700 {
 701         struct bonding *bond = to_bond(d);
 702
 703         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 704 }
 705
 706 static ssize_t bonding_store_downdelay(struct device *d,
 707                                        struct device_attribute *attr,
 708                                        const char *buf, size_t count)
 709 {
 710         int new_value, ret = count;
 711         struct bonding *bond = to_bond(d);
 712
 713         if (!(bond->params.miimon)) {
 714                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 715                        bond->dev->name);
 716                 ret = -EPERM;
 717                 goto out;
 718         }
 719
 720         if (sscanf(buf, "%d", &new_value) != 1) {
 721                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 722                 ret = -EINVAL;
 723                 goto out;
 724         }
 725         if (new_value < 0) {
 726                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 727                        bond->dev->name, new_value, 0, INT_MAX);
 728                 ret = -EINVAL;
 729                 goto out;
 730         } else {
 731                 if ((new_value % bond->params.miimon) != 0) {
 732                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 733                                    bond->dev->name, new_value,
 734                                    bond->params.miimon,
 735                                    (new_value / bond->params.miimon) *
 736                                    bond->params.miimon);
 737                 }
 738                 bond->params.downdelay = new_value / bond->params.miimon;
 739                 pr_info("%s: Setting down delay to %d.\n",
 740                         bond->dev->name,
 741                         bond->params.downdelay * bond->params.miimon);
 742
 743         }
 744
 745 out:
 746         return ret;
 747 }
 748 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 749                    bonding_show_downdelay, bonding_store_downdelay);
 750
 751 static ssize_t bonding_show_updelay(struct device *d,
 752                                     struct device_attribute *attr,
 753                                     char *buf)
 754 {
 755         struct bonding *bond = to_bond(d);
 756
 757         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 758
 759 }
 760
 761 static ssize_t bonding_store_updelay(struct device *d,
 762                                      struct device_attribute *attr,
 763                                      const char *buf, size_t count)
 764 {
 765         int new_value, ret = count;
 766         struct bonding *bond = to_bond(d);
 767
 768         if (!(bond->params.miimon)) {
 769                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 770                        bond->dev->name);
 771                 ret = -EPERM;
 772                 goto out;
 773         }
 774
 775         if (sscanf(buf, "%d", &new_value) != 1) {
 776                 pr_err("%s: no up delay value specified.\n",
 777                        bond->dev->name);
 778                 ret = -EINVAL;
 779                 goto out;
 780         }
 781         if (new_value < 0) {
 782                 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
 783                        bond->dev->name, new_value, 0, INT_MAX);
 784                 ret = -EINVAL;
 785                 goto out;
 786         } else {
 787                 if ((new_value % bond->params.miimon) != 0) {
 788                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 789                                    bond->dev->name, new_value,
 790                                    bond->params.miimon,
 791                                    (new_value / bond->params.miimon) *
 792                                    bond->params.miimon);
 793                 }
 794                 bond->params.updelay = new_value / bond->params.miimon;
 795                 pr_info("%s: Setting up delay to %d.\n",
 796                         bond->dev->name,
 797                         bond->params.updelay * bond->params.miimon);
 798         }
 799
 800 out:
 801         return ret;
 802 }
 803 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 804                    bonding_show_updelay, bonding_store_updelay);
 805
 806 /*
 807  * Show and set the LACP interval.  Interface must be down, and the mode
 808  * must be set to 802.3ad mode.
 809  */
 810 static ssize_t bonding_show_lacp(struct device *d,
 811                                  struct device_attribute *attr,
 812                                  char *buf)
 813 {
 814         struct bonding *bond = to_bond(d);
 815
 816         return sprintf(buf, "%s %d\n",
 817                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 818                 bond->params.lacp_fast);
 819 }
 820
 821 static ssize_t bonding_store_lacp(struct device *d,
 822                                   struct device_attribute *attr,
 823                                   const char *buf, size_t count)
 824 {
 825         struct bonding *bond = to_bond(d);
 826         int new_value, ret = count;
 827
 828         if (!rtnl_trylock())
 829                 return restart_syscall();
 830
 831         if (bond->dev->flags & IFF_UP) {
 832                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 833                        bond->dev->name);
 834                 ret = -EPERM;
 835                 goto out;
 836         }
 837
 838         if (bond->params.mode != BOND_MODE_8023AD) {
 839                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 840                        bond->dev->name);
 841                 ret = -EPERM;
 842                 goto out;
 843         }
 844
 845         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 846
 847         if ((new_value == 1) || (new_value == 0)) {
 848                 bond->params.lacp_fast = new_value;
 849                 bond_3ad_update_lacp_rate(bond);
 850                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 851                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 852                         new_value);
 853         } else {
 854                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 855                        bond->dev->name, (int)strlen(buf) - 1, buf);
 856                 ret = -EINVAL;
 857         }
 858 out:
 859         rtnl_unlock();
 860
 861         return ret;
 862 }
 863 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 864                    bonding_show_lacp, bonding_store_lacp);
 865
 866 static ssize_t bonding_show_min_links(struct device *d,
 867                                       struct device_attribute *attr,
 868                                       char *buf)
 869 {
 870         struct bonding *bond = to_bond(d);
 871
 872         return sprintf(buf, "%d\n", bond->params.min_links);
 873 }
 874
 875 static ssize_t bonding_store_min_links(struct device *d,
 876                                        struct device_attribute *attr,
 877                                        const char *buf, size_t count)
 878 {
 879         struct bonding *bond = to_bond(d);
 880         int ret;
 881         unsigned int new_value;
 882
 883         ret = kstrtouint(buf, 0, &new_value);
 884         if (ret < 0) {
 885                 pr_err("%s: Ignoring invalid min links value %s.\n",
 886                        bond->dev->name, buf);
 887                 return ret;
 888         }
 889
 890         pr_info("%s: Setting min links value to %u\n",
 891                 bond->dev->name, new_value);
 892         bond->params.min_links = new_value;
 893         return count;
 894 }
 895 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 896                    bonding_show_min_links, bonding_store_min_links);
 897
 898 static ssize_t bonding_show_ad_select(struct device *d,
 899                                       struct device_attribute *attr,
 900                                       char *buf)
 901 {
 902         struct bonding *bond = to_bond(d);
 903
 904         return sprintf(buf, "%s %d\n",
 905                 ad_select_tbl[bond->params.ad_select].modename,
 906                 bond->params.ad_select);
 907 }
 908
 909
 910 static ssize_t bonding_store_ad_select(struct device *d,
 911                                        struct device_attribute *attr,
 912                                        const char *buf, size_t count)
 913 {
 914         int new_value, ret = count;
 915         struct bonding *bond = to_bond(d);
 916
 917         if (bond->dev->flags & IFF_UP) {
 918                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 919                        bond->dev->name);
 920                 ret = -EPERM;
 921                 goto out;
 922         }
 923
 924         new_value = bond_parse_parm(buf, ad_select_tbl);
 925
 926         if (new_value != -1) {
 927                 bond->params.ad_select = new_value;
 928                 pr_info("%s: Setting ad_select to %s (%d).\n",
 929                         bond->dev->name, ad_select_tbl[new_value].modename,
 930                         new_value);
 931         } else {
 932                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 933                        bond->dev->name, (int)strlen(buf) - 1, buf);
 934                 ret = -EINVAL;
 935         }
 936 out:
 937         return ret;
 938 }
 939 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 940                    bonding_show_ad_select, bonding_store_ad_select);
 941
 942 /*
 943  * Show and set the number of peer notifications to send after a failover event.
 944  */
 945 static ssize_t bonding_show_num_peer_notif(struct device *d,
 946                                            struct device_attribute *attr,
 947                                            char *buf)
 948 {
 949         struct bonding *bond = to_bond(d);
 950         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 951 }
 952
 953 static ssize_t bonding_store_num_peer_notif(struct device *d,
 954                                             struct device_attribute *attr,
 955                                             const char *buf, size_t count)
 956 {
 957         struct bonding *bond = to_bond(d);
 958         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 959         return err ? err : count;
 960 }
 961 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 962                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 963 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 964                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 965
 966 /*
 967  * Show and set the MII monitor interval.  There are two tricky bits
 968  * here.  First, if MII monitoring is activated, then we must disable
 969  * ARP monitoring.  Second, if the timer isn't running, we must
 970  * start it.
 971  */
 972 static ssize_t bonding_show_miimon(struct device *d,
 973                                    struct device_attribute *attr,
 974                                    char *buf)
 975 {
 976         struct bonding *bond = to_bond(d);
 977
 978         return sprintf(buf, "%d\n", bond->params.miimon);
 979 }
 980
 981 static ssize_t bonding_store_miimon(struct device *d,
 982                                     struct device_attribute *attr,
 983                                     const char *buf, size_t count)
 984 {
 985         int new_value, ret = count;
 986         struct bonding *bond = to_bond(d);
 987
 988         if (!rtnl_trylock())
 989                 return restart_syscall();
 990         if (sscanf(buf, "%d", &new_value) != 1) {
 991                 pr_err("%s: no miimon value specified.\n",
 992                        bond->dev->name);
 993                 ret = -EINVAL;
 994                 goto out;
 995         }
 996         if (new_value < 0) {
 997                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 998                        bond->dev->name, new_value, 0, INT_MAX);
 999                 ret = -EINVAL;
1000                 goto out;
1001         }
1002         pr_info("%s: Setting MII monitoring interval to %d.\n",
1003                 bond->dev->name, new_value);
1004         bond->params.miimon = new_value;
1005         if (bond->params.updelay)
1006                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
1007                         bond->dev->name,
1008                         bond->params.updelay * bond->params.miimon);
1009         if (bond->params.downdelay)
1010                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1011                         bond->dev->name,
1012                         bond->params.downdelay * bond->params.miimon);
1013         if (new_value && bond->params.arp_interval) {
1014                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1015                         bond->dev->name);
1016                 bond->params.arp_interval = 0;
1017                 if (bond->params.arp_validate)
1018                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1019         }
1020         if (bond->dev->flags & IFF_UP) {
1021                 /* If the interface is up, we may need to fire off
1022                  * the MII timer. If the interface is down, the
1023                  * timer will get fired off when the open function
1024                  * is called.
1025                  */
1026                 if (!new_value) {
1027                         cancel_delayed_work_sync(&bond->mii_work);
1028                 } else {
1029                         cancel_delayed_work_sync(&bond->arp_work);
1030                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1031                 }
1032         }
1033 out:
1034         rtnl_unlock();
1035         return ret;
1036 }
1037 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1038                    bonding_show_miimon, bonding_store_miimon);
1039
1040 /*
1041  * Show and set the primary slave.  The store function is much
1042  * simpler than bonding_store_slaves function because it only needs to
1043  * handle one interface name.
1044  * The bond must be a mode that supports a primary for this be
1045  * set.
1046  */
1047 static ssize_t bonding_show_primary(struct device *d,
1048                                     struct device_attribute *attr,
1049                                     char *buf)
1050 {
1051         int count = 0;
1052         struct bonding *bond = to_bond(d);
1053
1054         if (bond->primary_slave)
1055                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1056
1057         return count;
1058 }
1059
1060 static ssize_t bonding_store_primary(struct device *d,
1061                                      struct device_attribute *attr,
1062                                      const char *buf, size_t count)
1063 {
1064         struct bonding *bond = to_bond(d);
1065         struct list_head *iter;
1066         char ifname[IFNAMSIZ];
1067         struct slave *slave;
1068
1069         if (!rtnl_trylock())
1070                 return restart_syscall();
1071         block_netpoll_tx();
1072         read_lock(&bond->lock);
1073         write_lock_bh(&bond->curr_slave_lock);
1074
1075         if (!USES_PRIMARY(bond->params.mode)) {
1076                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1077                         bond->dev->name, bond->dev->name, bond->params.mode);
1078                 goto out;
1079         }
1080
1081         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1082
1083         /* check to see if we are clearing primary */
1084         if (!strlen(ifname) || buf[0] == '\n') {
1085                 pr_info("%s: Setting primary slave to None.\n",
1086                         bond->dev->name);
1087                 bond->primary_slave = NULL;
1088                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1089                 bond_select_active_slave(bond);
1090                 goto out;
1091         }
1092
1093         bond_for_each_slave(bond, slave, iter) {
1094                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1095                         pr_info("%s: Setting %s as primary slave.\n",
1096                                 bond->dev->name, slave->dev->name);
1097                         bond->primary_slave = slave;
1098                         strcpy(bond->params.primary, slave->dev->name);
1099                         bond_select_active_slave(bond);
1100                         goto out;
1101                 }
1102         }
1103
1104         strncpy(bond->params.primary, ifname, IFNAMSIZ);
1105         bond->params.primary[IFNAMSIZ - 1] = 0;
1106
1107         pr_info("%s: Recording %s as primary, "
1108                 "but it has not been enslaved to %s yet.\n",
1109                 bond->dev->name, ifname, bond->dev->name);
1110 out:
1111         write_unlock_bh(&bond->curr_slave_lock);
1112         read_unlock(&bond->lock);
1113         unblock_netpoll_tx();
1114         rtnl_unlock();
1115
1116         return count;
1117 }
1118 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1119                    bonding_show_primary, bonding_store_primary);
1120
1121 /*
1122  * Show and set the primary_reselect flag.
1123  */
1124 static ssize_t bonding_show_primary_reselect(struct device *d,
1125                                              struct device_attribute *attr,
1126                                              char *buf)
1127 {
1128         struct bonding *bond = to_bond(d);
1129
1130         return sprintf(buf, "%s %d\n",
1131                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1132                        bond->params.primary_reselect);
1133 }
1134
1135 static ssize_t bonding_store_primary_reselect(struct device *d,
1136                                               struct device_attribute *attr,
1137                                               const char *buf, size_t count)
1138 {
1139         int new_value, ret = count;
1140         struct bonding *bond = to_bond(d);
1141
1142         if (!rtnl_trylock())
1143                 return restart_syscall();
1144
1145         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1146         if (new_value < 0)  {
1147                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1148                        bond->dev->name,
1149                        (int) strlen(buf) - 1, buf);
1150                 ret = -EINVAL;
1151                 goto out;
1152         }
1153
1154         bond->params.primary_reselect = new_value;
1155         pr_info("%s: setting primary_reselect to %s (%d).\n",
1156                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1157                 new_value);
1158
1159         block_netpoll_tx();
1160         read_lock(&bond->lock);
1161         write_lock_bh(&bond->curr_slave_lock);
1162         bond_select_active_slave(bond);
1163         write_unlock_bh(&bond->curr_slave_lock);
1164         read_unlock(&bond->lock);
1165         unblock_netpoll_tx();
1166 out:
1167         rtnl_unlock();
1168         return ret;
1169 }
1170 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1171                    bonding_show_primary_reselect,
1172                    bonding_store_primary_reselect);
1173
1174 /*
1175  * Show and set the use_carrier flag.
1176  */
1177 static ssize_t bonding_show_carrier(struct device *d,
1178                                     struct device_attribute *attr,
1179                                     char *buf)
1180 {
1181         struct bonding *bond = to_bond(d);
1182
1183         return sprintf(buf, "%d\n", bond->params.use_carrier);
1184 }
1185
1186 static ssize_t bonding_store_carrier(struct device *d,
1187                                      struct device_attribute *attr,
1188                                      const char *buf, size_t count)
1189 {
1190         int new_value, ret = count;
1191         struct bonding *bond = to_bond(d);
1192
1193
1194         if (sscanf(buf, "%d", &new_value) != 1) {
1195                 pr_err("%s: no use_carrier value specified.\n",
1196                        bond->dev->name);
1197                 ret = -EINVAL;
1198                 goto out;
1199         }
1200         if ((new_value == 0) || (new_value == 1)) {
1201                 bond->params.use_carrier = new_value;
1202                 pr_info("%s: Setting use_carrier to %d.\n",
1203                         bond->dev->name, new_value);
1204         } else {
1205                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1206                         bond->dev->name, new_value);
1207         }
1208 out:
1209         return ret;
1210 }
1211 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1212                    bonding_show_carrier, bonding_store_carrier);
1213
1214
1215 /*
1216  * Show and set currently active_slave.
1217  */
1218 static ssize_t bonding_show_active_slave(struct device *d,
1219                                          struct device_attribute *attr,
1220                                          char *buf)
1221 {
1222         struct bonding *bond = to_bond(d);
1223         struct net_device *slave_dev;
1224         int count = 0;
1225
1226         rcu_read_lock();
1227         slave_dev = bond_option_active_slave_get_rcu(bond);
1228         if (slave_dev)
1229                 count = sprintf(buf, "%s\n", slave_dev->name);
1230         rcu_read_unlock();
1231
1232         return count;
1233 }
1234
1235 static ssize_t bonding_store_active_slave(struct device *d,
1236                                           struct device_attribute *attr,
1237                                           const char *buf, size_t count)
1238 {
1239         int ret;
1240         struct bonding *bond = to_bond(d);
1241         char ifname[IFNAMSIZ];
1242         struct net_device *dev;
1243
1244         if (!rtnl_trylock())
1245                 return restart_syscall();
1246
1247         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1248         if (!strlen(ifname) || buf[0] == '\n') {
1249                 dev = NULL;
1250         } else {
1251                 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1252                 if (!dev) {
1253                         ret = -ENODEV;
1254                         goto out;
1255                 }
1256         }
1257
1258         ret = bond_option_active_slave_set(bond, dev);
1259         if (!ret)
1260                 ret = count;
1261
1262  out:
1263         rtnl_unlock();
1264
1265         return ret;
1266
1267 }
1268 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1269                    bonding_show_active_slave, bonding_store_active_slave);
1270
1271
1272 /*
1273  * Show link status of the bond interface.
1274  */
1275 static ssize_t bonding_show_mii_status(struct device *d,
1276                                        struct device_attribute *attr,
1277                                        char *buf)
1278 {
1279         struct bonding *bond = to_bond(d);
1280
1281         return sprintf(buf, "%s\n", bond->curr_active_slave ? "up" : "down");
1282 }
1283 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1284
1285 /*
1286  * Show current 802.3ad aggregator ID.
1287  */
1288 static ssize_t bonding_show_ad_aggregator(struct device *d,
1289                                           struct device_attribute *attr,
1290                                           char *buf)
1291 {
1292         int count = 0;
1293         struct bonding *bond = to_bond(d);
1294
1295         if (bond->params.mode == BOND_MODE_8023AD) {
1296                 struct ad_info ad_info;
1297                 count = sprintf(buf, "%d\n",
1298                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1299                                 ?  0 : ad_info.aggregator_id);
1300         }
1301
1302         return count;
1303 }
1304 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1305
1306
1307 /*
1308  * Show number of active 802.3ad ports.
1309  */
1310 static ssize_t bonding_show_ad_num_ports(struct device *d,
1311                                          struct device_attribute *attr,
1312                                          char *buf)
1313 {
1314         int count = 0;
1315         struct bonding *bond = to_bond(d);
1316
1317         if (bond->params.mode == BOND_MODE_8023AD) {
1318                 struct ad_info ad_info;
1319                 count = sprintf(buf, "%d\n",
1320                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1321                                 ?  0 : ad_info.ports);
1322         }
1323
1324         return count;
1325 }
1326 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1327
1328
1329 /*
1330  * Show current 802.3ad actor key.
1331  */
1332 static ssize_t bonding_show_ad_actor_key(struct device *d,
1333                                          struct device_attribute *attr,
1334                                          char *buf)
1335 {
1336         int count = 0;
1337         struct bonding *bond = to_bond(d);
1338
1339         if (bond->params.mode == BOND_MODE_8023AD) {
1340                 struct ad_info ad_info;
1341                 count = sprintf(buf, "%d\n",
1342                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1343                                 ?  0 : ad_info.actor_key);
1344         }
1345
1346         return count;
1347 }
1348 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1349
1350
1351 /*
1352  * Show current 802.3ad partner key.
1353  */
1354 static ssize_t bonding_show_ad_partner_key(struct device *d,
1355                                            struct device_attribute *attr,
1356                                            char *buf)
1357 {
1358         int count = 0;
1359         struct bonding *bond = to_bond(d);
1360
1361         if (bond->params.mode == BOND_MODE_8023AD) {
1362                 struct ad_info ad_info;
1363                 count = sprintf(buf, "%d\n",
1364                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1365                                 ?  0 : ad_info.partner_key);
1366         }
1367
1368         return count;
1369 }
1370 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1371
1372
1373 /*
1374  * Show current 802.3ad partner mac.
1375  */
1376 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1377                                            struct device_attribute *attr,
1378                                            char *buf)
1379 {
1380         int count = 0;
1381         struct bonding *bond = to_bond(d);
1382
1383         if (bond->params.mode == BOND_MODE_8023AD) {
1384                 struct ad_info ad_info;
1385                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1386                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1387         }
1388
1389         return count;
1390 }
1391 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1392
1393 /*
1394  * Show the queue_ids of the slaves in the current bond.
1395  */
1396 static ssize_t bonding_show_queue_id(struct device *d,
1397                                      struct device_attribute *attr,
1398                                      char *buf)
1399 {
1400         struct bonding *bond = to_bond(d);
1401         struct list_head *iter;
1402         struct slave *slave;
1403         int res = 0;
1404
1405         if (!rtnl_trylock())
1406                 return restart_syscall();
1407
1408         bond_for_each_slave(bond, slave, iter) {
1409                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1410                         /* not enough space for another interface_name:queue_id pair */
1411                         if ((PAGE_SIZE - res) > 10)
1412                                 res = PAGE_SIZE - 10;
1413                         res += sprintf(buf + res, "++more++ ");
1414                         break;
1415                 }
1416                 res += sprintf(buf + res, "%s:%d ",
1417                                slave->dev->name, slave->queue_id);
1418         }
1419         if (res)
1420                 buf[res-1] = '\n'; /* eat the leftover space */
1421
1422         rtnl_unlock();
1423
1424         return res;
1425 }
1426
1427 /*
1428  * Set the queue_ids of the  slaves in the current bond.  The bond
1429  * interface must be enslaved for this to work.
1430  */
1431 static ssize_t bonding_store_queue_id(struct device *d,
1432                                       struct device_attribute *attr,
1433                                       const char *buffer, size_t count)
1434 {
1435         struct slave *slave, *update_slave;
1436         struct bonding *bond = to_bond(d);
1437         struct list_head *iter;
1438         u16 qid;
1439         int ret = count;
1440         char *delim;
1441         struct net_device *sdev = NULL;
1442
1443         if (!rtnl_trylock())
1444                 return restart_syscall();
1445
1446         /* delim will point to queue id if successful */
1447         delim = strchr(buffer, ':');
1448         if (!delim)
1449                 goto err_no_cmd;
1450
1451         /*
1452          * Terminate string that points to device name and bump it
1453          * up one, so we can read the queue id there.
1454          */
1455         *delim = '\0';
1456         if (sscanf(++delim, "%hd\n", &qid) != 1)
1457                 goto err_no_cmd;
1458
1459         /* Check buffer length, valid ifname and queue id */
1460         if (strlen(buffer) > IFNAMSIZ ||
1461             !dev_valid_name(buffer) ||
1462             qid > bond->dev->real_num_tx_queues)
1463                 goto err_no_cmd;
1464
1465         /* Get the pointer to that interface if it exists */
1466         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1467         if (!sdev)
1468                 goto err_no_cmd;
1469
1470         /* Search for thes slave and check for duplicate qids */
1471         update_slave = NULL;
1472         bond_for_each_slave(bond, slave, iter) {
1473                 if (sdev == slave->dev)
1474                         /*
1475                          * We don't need to check the matching
1476                          * slave for dups, since we're overwriting it
1477                          */
1478                         update_slave = slave;
1479                 else if (qid && qid == slave->queue_id) {
1480                         goto err_no_cmd;
1481                 }
1482         }
1483
1484         if (!update_slave)
1485                 goto err_no_cmd;
1486
1487         /* Actually set the qids for the slave */
1488         update_slave->queue_id = qid;
1489
1490 out:
1491         rtnl_unlock();
1492         return ret;
1493
1494 err_no_cmd:
1495         pr_info("invalid input for queue_id set for %s.\n",
1496                 bond->dev->name);
1497         ret = -EPERM;
1498         goto out;
1499 }
1500
1501 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1502                    bonding_store_queue_id);
1503
1504
1505 /*
1506  * Show and set the all_slaves_active flag.
1507  */
1508 static ssize_t bonding_show_slaves_active(struct device *d,
1509                                           struct device_attribute *attr,
1510                                           char *buf)
1511 {
1512         struct bonding *bond = to_bond(d);
1513
1514         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1515 }
1516
1517 static ssize_t bonding_store_slaves_active(struct device *d,
1518                                            struct device_attribute *attr,
1519                                            const char *buf, size_t count)
1520 {
1521         struct bonding *bond = to_bond(d);
1522         int new_value, ret = count;
1523         struct list_head *iter;
1524         struct slave *slave;
1525
1526         if (!rtnl_trylock())
1527                 return restart_syscall();
1528
1529         if (sscanf(buf, "%d", &new_value) != 1) {
1530                 pr_err("%s: no all_slaves_active value specified.\n",
1531                        bond->dev->name);
1532                 ret = -EINVAL;
1533                 goto out;
1534         }
1535
1536         if (new_value == bond->params.all_slaves_active)
1537                 goto out;
1538
1539         if ((new_value == 0) || (new_value == 1)) {
1540                 bond->params.all_slaves_active = new_value;
1541         } else {
1542                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1543                         bond->dev->name, new_value);
1544                 ret = -EINVAL;
1545                 goto out;
1546         }
1547
1548         bond_for_each_slave(bond, slave, iter) {
1549                 if (!bond_is_active_slave(slave)) {
1550                         if (new_value)
1551                                 slave->inactive = 0;
1552                         else
1553                                 slave->inactive = 1;
1554                 }
1555         }
1556 out:
1557         rtnl_unlock();
1558         return ret;
1559 }
1560 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1561                    bonding_show_slaves_active, bonding_store_slaves_active);
1562
1563 /*
1564  * Show and set the number of IGMP membership reports to send on link failure
1565  */
1566 static ssize_t bonding_show_resend_igmp(struct device *d,
1567                                         struct device_attribute *attr,
1568                                         char *buf)
1569 {
1570         struct bonding *bond = to_bond(d);
1571
1572         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1573 }
1574
1575 static ssize_t bonding_store_resend_igmp(struct device *d,
1576                                          struct device_attribute *attr,
1577                                          const char *buf, size_t count)
1578 {
1579         int new_value, ret = count;
1580         struct bonding *bond = to_bond(d);
1581
1582         if (sscanf(buf, "%d", &new_value) != 1) {
1583                 pr_err("%s: no resend_igmp value specified.\n",
1584                        bond->dev->name);
1585                 ret = -EINVAL;
1586                 goto out;
1587         }
1588
1589         if (new_value < 0 || new_value > 255) {
1590                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1591                        bond->dev->name, new_value);
1592                 ret = -EINVAL;
1593                 goto out;
1594         }
1595
1596         pr_info("%s: Setting resend_igmp to %d.\n",
1597                 bond->dev->name, new_value);
1598         bond->params.resend_igmp = new_value;
1599 out:
1600         return ret;
1601 }
1602
1603 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1604                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1605
1606
1607 static ssize_t bonding_show_lp_interval(struct device *d,
1608                                         struct device_attribute *attr,
1609                                         char *buf)
1610 {
1611         struct bonding *bond = to_bond(d);
1612         return sprintf(buf, "%d\n", bond->params.lp_interval);
1613 }
1614
1615 static ssize_t bonding_store_lp_interval(struct device *d,
1616                                          struct device_attribute *attr,
1617                                          const char *buf, size_t count)
1618 {
1619         struct bonding *bond = to_bond(d);
1620         int new_value, ret = count;
1621
1622         if (sscanf(buf, "%d", &new_value) != 1) {
1623                 pr_err("%s: no lp interval value specified.\n",
1624                         bond->dev->name);
1625                 ret = -EINVAL;
1626                 goto out;
1627         }
1628
1629         if (new_value <= 0) {
1630                 pr_err ("%s: lp_interval must be between 1 and %d\n",
1631                         bond->dev->name, INT_MAX);
1632                 ret = -EINVAL;
1633                 goto out;
1634         }
1635
1636         bond->params.lp_interval = new_value;
1637 out:
1638         return ret;
1639 }
1640
1641 static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
1642                    bonding_show_lp_interval, bonding_store_lp_interval);
1643
1644 static ssize_t bonding_show_packets_per_slave(struct device *d,
1645                                               struct device_attribute *attr,
1646                                               char *buf)
1647 {
1648         struct bonding *bond = to_bond(d);
1649         int packets_per_slave = bond->params.packets_per_slave;
1650
1651         if (packets_per_slave > 1)
1652                 packets_per_slave = reciprocal_value(packets_per_slave);
1653
1654         return sprintf(buf, "%d\n", packets_per_slave);
1655 }
1656
1657 static ssize_t bonding_store_packets_per_slave(struct device *d,
1658                                                struct device_attribute *attr,
1659                                                const char *buf, size_t count)
1660 {
1661         struct bonding *bond = to_bond(d);
1662         int new_value, ret = count;
1663
1664         if (sscanf(buf, "%d", &new_value) != 1) {
1665                 pr_err("%s: no packets_per_slave value specified.\n",
1666                        bond->dev->name);
1667                 ret = -EINVAL;
1668                 goto out;
1669         }
1670         if (new_value < 0 || new_value > USHRT_MAX) {
1671                 pr_err("%s: packets_per_slave must be between 0 and %u\n",
1672                        bond->dev->name, USHRT_MAX);
1673                 ret = -EINVAL;
1674                 goto out;
1675         }
1676         if (bond->params.mode != BOND_MODE_ROUNDROBIN)
1677                 pr_warn("%s: Warning: packets_per_slave has effect only in balance-rr mode\n",
1678                         bond->dev->name);
1679         if (new_value > 1)
1680                 bond->params.packets_per_slave = reciprocal_value(new_value);
1681         else
1682                 bond->params.packets_per_slave = new_value;
1683 out:
1684         return ret;
1685 }
1686
1687 static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
1688                    bonding_show_packets_per_slave,
1689                    bonding_store_packets_per_slave);
1690
1691 static struct attribute *per_bond_attrs[] = {
1692         &dev_attr_slaves.attr,
1693         &dev_attr_mode.attr,
1694         &dev_attr_fail_over_mac.attr,
1695         &dev_attr_arp_validate.attr,
1696         &dev_attr_arp_all_targets.attr,
1697         &dev_attr_arp_interval.attr,
1698         &dev_attr_arp_ip_target.attr,
1699         &dev_attr_downdelay.attr,
1700         &dev_attr_updelay.attr,
1701         &dev_attr_lacp_rate.attr,
1702         &dev_attr_ad_select.attr,
1703         &dev_attr_xmit_hash_policy.attr,
1704         &dev_attr_num_grat_arp.attr,
1705         &dev_attr_num_unsol_na.attr,
1706         &dev_attr_miimon.attr,
1707         &dev_attr_primary.attr,
1708         &dev_attr_primary_reselect.attr,
1709         &dev_attr_use_carrier.attr,
1710         &dev_attr_active_slave.attr,
1711         &dev_attr_mii_status.attr,
1712         &dev_attr_ad_aggregator.attr,
1713         &dev_attr_ad_num_ports.attr,
1714         &dev_attr_ad_actor_key.attr,
1715         &dev_attr_ad_partner_key.attr,
1716         &dev_attr_ad_partner_mac.attr,
1717         &dev_attr_queue_id.attr,
1718         &dev_attr_all_slaves_active.attr,
1719         &dev_attr_resend_igmp.attr,
1720         &dev_attr_min_links.attr,
1721         &dev_attr_lp_interval.attr,
1722         &dev_attr_packets_per_slave.attr,
1723         NULL,
1724 };
1725
1726 static struct attribute_group bonding_group = {
1727         .name = "bonding",
1728         .attrs = per_bond_attrs,
1729 };
1730
1731 /*
1732  * Initialize sysfs.  This sets up the bonding_masters file in
1733  * /sys/class/net.
1734  */
1735 int bond_create_sysfs(struct bond_net *bn)
1736 {
1737         int ret;
1738
1739         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1740         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1741
1742         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1743         /*
1744          * Permit multiple loads of the module by ignoring failures to
1745          * create the bonding_masters sysfs file.  Bonding devices
1746          * created by second or subsequent loads of the module will
1747          * not be listed in, or controllable by, bonding_masters, but
1748          * will have the usual "bonding" sysfs directory.
1749          *
1750          * This is done to preserve backwards compatibility for
1751          * initscripts/sysconfig, which load bonding multiple times to
1752          * configure multiple bonding devices.
1753          */
1754         if (ret == -EEXIST) {
1755                 /* Is someone being kinky and naming a device bonding_master? */
1756                 if (__dev_get_by_name(bn->net,
1757                                       class_attr_bonding_masters.attr.name))
1758                         pr_err("network device named %s already exists in sysfs",
1759                                class_attr_bonding_masters.attr.name);
1760                 ret = 0;
1761         }
1762
1763         return ret;
1764
1765 }
1766
1767 /*
1768  * Remove /sys/class/net/bonding_masters.
1769  */
1770 void bond_destroy_sysfs(struct bond_net *bn)
1771 {
1772         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1773 }
1774
1775 /*
1776  * Initialize sysfs for each bond.  This sets up and registers
1777  * the 'bondctl' directory for each individual bond under /sys/class/net.
1778  */
1779 void bond_prepare_sysfs_group(struct bonding *bond)
1780 {
1781         bond->dev->sysfs_groups[0] = &bonding_group;
1782 }
1783