drivers/net/bonding/bond_sysfs.c

   1 /*
   2  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <linux/sched.h>
  29 #include <linux/sysdev.h>
  30 #include <linux/fs.h>
  31 #include <linux/types.h>
  32 #include <linux/string.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/inetdevice.h>
  35 #include <linux/in.h>
  36 #include <linux/sysfs.h>
  37 #include <linux/ctype.h>
  38 #include <linux/inet.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/etherdevice.h>
  41 #include <net/net_namespace.h>
  42 #include <net/netns/generic.h>
  43 #include <linux/nsproxy.h>
  44
  45 #include "bonding.h"
  46
  47 #define to_dev(obj)     container_of(obj, struct device, kobj)
  48 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  49
  50 /*
  51  * "show" function for the bond_masters attribute.
  52  * The class parameter is ignored.
  53  */
  54 static ssize_t bonding_show_bonds(struct class *cls,
  55                                   struct class_attribute *attr,
  56                                   char *buf)
  57 {
  58         struct net *net = current->nsproxy->net_ns;
  59         struct bond_net *bn = net_generic(net, bond_net_id);
  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 net *net, const char *ifname)
  83 {
  84         struct bond_net *bn = net_generic(net, bond_net_id);
  85         struct bonding *bond;
  86
  87         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  88                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  89                         return bond->dev;
  90         }
  91         return NULL;
  92 }
  93
  94 /*
  95  * "store" function for the bond_masters attribute.  This is what
  96  * creates and deletes entire bonds.
  97  *
  98  * The class parameter is ignored.
  99  *
 100  */
 101
 102 static ssize_t bonding_store_bonds(struct class *cls,
 103                                    struct class_attribute *attr,
 104                                    const char *buffer, size_t count)
 105 {
 106         struct net *net = current->nsproxy->net_ns;
 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(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(net, 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 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 154 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 155                   bonding_show_bonds, bonding_store_bonds);
 156
 157 int bond_create_slave_symlinks(struct net_device *master,
 158                                struct net_device *slave)
 159 {
 160         char linkname[IFNAMSIZ+7];
 161         int ret = 0;
 162
 163         /* first, create a link from the slave back to the master */
 164         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 165                                 "master");
 166         if (ret)
 167                 return ret;
 168         /* next, create a link from the master to the slave */
 169         sprintf(linkname, "slave_%s", slave->name);
 170         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 171                                 linkname);
 172         return ret;
 173
 174 }
 175
 176 void bond_destroy_slave_symlinks(struct net_device *master,
 177                                  struct net_device *slave)
 178 {
 179         char linkname[IFNAMSIZ+7];
 180
 181         sysfs_remove_link(&(slave->dev.kobj), "master");
 182         sprintf(linkname, "slave_%s", slave->name);
 183         sysfs_remove_link(&(master->dev.kobj), linkname);
 184 }
 185
 186
 187 /*
 188  * Show the slaves in the current bond.
 189  */
 190 static ssize_t bonding_show_slaves(struct device *d,
 191                                    struct device_attribute *attr, char *buf)
 192 {
 193         struct slave *slave;
 194         int i, res = 0;
 195         struct bonding *bond = to_bond(d);
 196
 197         read_lock(&bond->lock);
 198         bond_for_each_slave(bond, slave, i) {
 199                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 200                         /* not enough space for another interface name */
 201                         if ((PAGE_SIZE - res) > 10)
 202                                 res = PAGE_SIZE - 10;
 203                         res += sprintf(buf + res, "++more++ ");
 204                         break;
 205                 }
 206                 res += sprintf(buf + res, "%s ", slave->dev->name);
 207         }
 208         read_unlock(&bond->lock);
 209         if (res)
 210                 buf[res-1] = '\n'; /* eat the leftover space */
 211         return res;
 212 }
 213
 214 /*
 215  * Set the slaves in the current bond.  The bond interface must be
 216  * up for this to succeed.
 217  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 218  * All hard work should be done there.
 219  */
 220 static ssize_t bonding_store_slaves(struct device *d,
 221                                     struct device_attribute *attr,
 222                                     const char *buffer, size_t count)
 223 {
 224         char command[IFNAMSIZ + 1] = { 0, };
 225         char *ifname;
 226         int res, ret = count;
 227         struct net_device *dev;
 228         struct bonding *bond = to_bond(d);
 229
 230         if (!rtnl_trylock())
 231                 return restart_syscall();
 232
 233         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 234         ifname = command + 1;
 235         if ((strlen(command) <= 1) ||
 236             !dev_valid_name(ifname))
 237                 goto err_no_cmd;
 238
 239         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 240         if (!dev) {
 241                 pr_info("%s: Interface %s does not exist!\n",
 242                         bond->dev->name, ifname);
 243                 ret = -ENODEV;
 244                 goto out;
 245         }
 246
 247         switch (command[0]) {
 248         case '+':
 249                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 250                 res = bond_enslave(bond->dev, dev);
 251                 break;
 252
 253         case '-':
 254                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 255                 res = bond_release(bond->dev, dev);
 256                 break;
 257
 258         default:
 259                 goto err_no_cmd;
 260         }
 261
 262         if (res)
 263                 ret = res;
 264         goto out;
 265
 266 err_no_cmd:
 267         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 268                bond->dev->name);
 269         ret = -EPERM;
 270
 271 out:
 272         rtnl_unlock();
 273         return ret;
 274 }
 275
 276 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 277                    bonding_store_slaves);
 278
 279 /*
 280  * Show and set the bonding mode.  The bond interface must be down to
 281  * change the mode.
 282  */
 283 static ssize_t bonding_show_mode(struct device *d,
 284                                  struct device_attribute *attr, char *buf)
 285 {
 286         struct bonding *bond = to_bond(d);
 287
 288         return sprintf(buf, "%s %d\n",
 289                         bond_mode_tbl[bond->params.mode].modename,
 290                         bond->params.mode);
 291 }
 292
 293 static ssize_t bonding_store_mode(struct device *d,
 294                                   struct device_attribute *attr,
 295                                   const char *buf, size_t count)
 296 {
 297         int new_value, ret = count;
 298         struct bonding *bond = to_bond(d);
 299
 300         if (bond->dev->flags & IFF_UP) {
 301                 pr_err("unable to update mode of %s because interface is up.\n",
 302                        bond->dev->name);
 303                 ret = -EPERM;
 304                 goto out;
 305         }
 306
 307         new_value = bond_parse_parm(buf, bond_mode_tbl);
 308         if (new_value < 0)  {
 309                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 310                        bond->dev->name, (int)strlen(buf) - 1, buf);
 311                 ret = -EINVAL;
 312                 goto out;
 313         }
 314         if ((new_value == BOND_MODE_ALB ||
 315              new_value == BOND_MODE_TLB) &&
 316             bond->params.arp_interval) {
 317                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 318                        bond->dev->name, bond_mode_tbl[new_value].modename);
 319                 ret = -EINVAL;
 320                 goto out;
 321         }
 322
 323         bond->params.mode = new_value;
 324         bond_set_mode_ops(bond, bond->params.mode);
 325         pr_info("%s: setting mode to %s (%d).\n",
 326                 bond->dev->name, bond_mode_tbl[new_value].modename,
 327                 new_value);
 328 out:
 329         return ret;
 330 }
 331 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 332                    bonding_show_mode, bonding_store_mode);
 333
 334 /*
 335  * Show and set the bonding transmit hash method.
 336  * The bond interface must be down to change the xmit hash policy.
 337  */
 338 static ssize_t bonding_show_xmit_hash(struct device *d,
 339                                       struct device_attribute *attr,
 340                                       char *buf)
 341 {
 342         struct bonding *bond = to_bond(d);
 343
 344         return sprintf(buf, "%s %d\n",
 345                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 346                        bond->params.xmit_policy);
 347 }
 348
 349 static ssize_t bonding_store_xmit_hash(struct device *d,
 350                                        struct device_attribute *attr,
 351                                        const char *buf, size_t count)
 352 {
 353         int new_value, ret = count;
 354         struct bonding *bond = to_bond(d);
 355
 356         if (bond->dev->flags & IFF_UP) {
 357                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 358                        bond->dev->name);
 359                 ret = -EPERM;
 360                 goto out;
 361         }
 362
 363         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 364         if (new_value < 0)  {
 365                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 366                        bond->dev->name,
 367                        (int)strlen(buf) - 1, buf);
 368                 ret = -EINVAL;
 369                 goto out;
 370         } else {
 371                 bond->params.xmit_policy = new_value;
 372                 bond_set_mode_ops(bond, bond->params.mode);
 373                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 374                         bond->dev->name,
 375                         xmit_hashtype_tbl[new_value].modename, new_value);
 376         }
 377 out:
 378         return ret;
 379 }
 380 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 381                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 382
 383 /*
 384  * Show and set arp_validate.
 385  */
 386 static ssize_t bonding_show_arp_validate(struct device *d,
 387                                          struct device_attribute *attr,
 388                                          char *buf)
 389 {
 390         struct bonding *bond = to_bond(d);
 391
 392         return sprintf(buf, "%s %d\n",
 393                        arp_validate_tbl[bond->params.arp_validate].modename,
 394                        bond->params.arp_validate);
 395 }
 396
 397 static ssize_t bonding_store_arp_validate(struct device *d,
 398                                           struct device_attribute *attr,
 399                                           const char *buf, size_t count)
 400 {
 401         int new_value;
 402         struct bonding *bond = to_bond(d);
 403
 404         new_value = bond_parse_parm(buf, arp_validate_tbl);
 405         if (new_value < 0) {
 406                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 407                        bond->dev->name, buf);
 408                 return -EINVAL;
 409         }
 410         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 411                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 412                        bond->dev->name);
 413                 return -EINVAL;
 414         }
 415         pr_info("%s: setting arp_validate to %s (%d).\n",
 416                 bond->dev->name, arp_validate_tbl[new_value].modename,
 417                 new_value);
 418
 419         bond->params.arp_validate = new_value;
 420
 421         return count;
 422 }
 423
 424 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 425                    bonding_store_arp_validate);
 426
 427 /*
 428  * Show and store fail_over_mac.  User only allowed to change the
 429  * value when there are no slaves.
 430  */
 431 static ssize_t bonding_show_fail_over_mac(struct device *d,
 432                                           struct device_attribute *attr,
 433                                           char *buf)
 434 {
 435         struct bonding *bond = to_bond(d);
 436
 437         return sprintf(buf, "%s %d\n",
 438                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 439                        bond->params.fail_over_mac);
 440 }
 441
 442 static ssize_t bonding_store_fail_over_mac(struct device *d,
 443                                            struct device_attribute *attr,
 444                                            const char *buf, size_t count)
 445 {
 446         int new_value;
 447         struct bonding *bond = to_bond(d);
 448
 449         if (bond->slave_cnt != 0) {
 450                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 451                        bond->dev->name);
 452                 return -EPERM;
 453         }
 454
 455         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 456         if (new_value < 0) {
 457                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 458                        bond->dev->name, buf);
 459                 return -EINVAL;
 460         }
 461
 462         bond->params.fail_over_mac = new_value;
 463         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 464                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 465                 new_value);
 466
 467         return count;
 468 }
 469
 470 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 471                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 472
 473 /*
 474  * Show and set the arp timer interval.  There are two tricky bits
 475  * here.  First, if ARP monitoring is activated, then we must disable
 476  * MII monitoring.  Second, if the ARP timer isn't running, we must
 477  * start it.
 478  */
 479 static ssize_t bonding_show_arp_interval(struct device *d,
 480                                          struct device_attribute *attr,
 481                                          char *buf)
 482 {
 483         struct bonding *bond = to_bond(d);
 484
 485         return sprintf(buf, "%d\n", bond->params.arp_interval);
 486 }
 487
 488 static ssize_t bonding_store_arp_interval(struct device *d,
 489                                           struct device_attribute *attr,
 490                                           const char *buf, size_t count)
 491 {
 492         int new_value, ret = count;
 493         struct bonding *bond = to_bond(d);
 494
 495         if (sscanf(buf, "%d", &new_value) != 1) {
 496                 pr_err("%s: no arp_interval value specified.\n",
 497                        bond->dev->name);
 498                 ret = -EINVAL;
 499                 goto out;
 500         }
 501         if (new_value < 0) {
 502                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 503                        bond->dev->name, new_value, INT_MAX);
 504                 ret = -EINVAL;
 505                 goto out;
 506         }
 507         if (bond->params.mode == BOND_MODE_ALB ||
 508             bond->params.mode == BOND_MODE_TLB) {
 509                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 510                         bond->dev->name, bond->dev->name);
 511                 ret = -EINVAL;
 512                 goto out;
 513         }
 514         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 515                 bond->dev->name, new_value);
 516         bond->params.arp_interval = new_value;
 517         if (bond->params.miimon) {
 518                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 519                         bond->dev->name, bond->dev->name);
 520                 bond->params.miimon = 0;
 521                 if (delayed_work_pending(&bond->mii_work)) {
 522                         cancel_delayed_work(&bond->mii_work);
 523                         flush_workqueue(bond->wq);
 524                 }
 525         }
 526         if (!bond->params.arp_targets[0]) {
 527                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 528                         bond->dev->name);
 529         }
 530         if (bond->dev->flags & IFF_UP) {
 531                 /* If the interface is up, we may need to fire off
 532                  * the ARP timer.  If the interface is down, the
 533                  * timer will get fired off when the open function
 534                  * is called.
 535                  */
 536                 if (!delayed_work_pending(&bond->arp_work)) {
 537                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 538                                 INIT_DELAYED_WORK(&bond->arp_work,
 539                                                   bond_activebackup_arp_mon);
 540                         else
 541                                 INIT_DELAYED_WORK(&bond->arp_work,
 542                                                   bond_loadbalance_arp_mon);
 543
 544                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 545                 }
 546         }
 547
 548 out:
 549         return ret;
 550 }
 551 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 552                    bonding_show_arp_interval, bonding_store_arp_interval);
 553
 554 /*
 555  * Show and set the arp targets.
 556  */
 557 static ssize_t bonding_show_arp_targets(struct device *d,
 558                                         struct device_attribute *attr,
 559                                         char *buf)
 560 {
 561         int i, res = 0;
 562         struct bonding *bond = to_bond(d);
 563
 564         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 565                 if (bond->params.arp_targets[i])
 566                         res += sprintf(buf + res, "%pI4 ",
 567                                        &bond->params.arp_targets[i]);
 568         }
 569         if (res)
 570                 buf[res-1] = '\n'; /* eat the leftover space */
 571         return res;
 572 }
 573
 574 static ssize_t bonding_store_arp_targets(struct device *d,
 575                                          struct device_attribute *attr,
 576                                          const char *buf, size_t count)
 577 {
 578         __be32 newtarget;
 579         int i = 0, done = 0, ret = count;
 580         struct bonding *bond = to_bond(d);
 581         __be32 *targets;
 582
 583         targets = bond->params.arp_targets;
 584         newtarget = in_aton(buf + 1);
 585         /* look for adds */
 586         if (buf[0] == '+') {
 587                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 588                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 589                                bond->dev->name, &newtarget);
 590                         ret = -EINVAL;
 591                         goto out;
 592                 }
 593                 /* look for an empty slot to put the target in, and check for dupes */
 594                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 595                         if (targets[i] == newtarget) { /* duplicate */
 596                                 pr_err("%s: ARP target %pI4 is already present\n",
 597                                        bond->dev->name, &newtarget);
 598                                 ret = -EINVAL;
 599                                 goto out;
 600                         }
 601                         if (targets[i] == 0) {
 602                                 pr_info("%s: adding ARP target %pI4.\n",
 603                                         bond->dev->name, &newtarget);
 604                                 done = 1;
 605                                 targets[i] = newtarget;
 606                         }
 607                 }
 608                 if (!done) {
 609                         pr_err("%s: ARP target table is full!\n",
 610                                bond->dev->name);
 611                         ret = -EINVAL;
 612                         goto out;
 613                 }
 614
 615         } else if (buf[0] == '-')       {
 616                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 617                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 618                                bond->dev->name, &newtarget);
 619                         ret = -EINVAL;
 620                         goto out;
 621                 }
 622
 623                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 624                         if (targets[i] == newtarget) {
 625                                 int j;
 626                                 pr_info("%s: removing ARP target %pI4.\n",
 627                                         bond->dev->name, &newtarget);
 628                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 629                                         targets[j] = targets[j+1];
 630
 631                                 targets[j] = 0;
 632                                 done = 1;
 633                         }
 634                 }
 635                 if (!done) {
 636                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 637                                 bond->dev->name, &newtarget);
 638                         ret = -EINVAL;
 639                         goto out;
 640                 }
 641         } else {
 642                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 643                        bond->dev->name);
 644                 ret = -EPERM;
 645                 goto out;
 646         }
 647
 648 out:
 649         return ret;
 650 }
 651 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 652
 653 /*
 654  * Show and set the up and down delays.  These must be multiples of the
 655  * MII monitoring value, and are stored internally as the multiplier.
 656  * Thus, we must translate to MS for the real world.
 657  */
 658 static ssize_t bonding_show_downdelay(struct device *d,
 659                                       struct device_attribute *attr,
 660                                       char *buf)
 661 {
 662         struct bonding *bond = to_bond(d);
 663
 664         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 665 }
 666
 667 static ssize_t bonding_store_downdelay(struct device *d,
 668                                        struct device_attribute *attr,
 669                                        const char *buf, size_t count)
 670 {
 671         int new_value, ret = count;
 672         struct bonding *bond = to_bond(d);
 673
 674         if (!(bond->params.miimon)) {
 675                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 676                        bond->dev->name);
 677                 ret = -EPERM;
 678                 goto out;
 679         }
 680
 681         if (sscanf(buf, "%d", &new_value) != 1) {
 682                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 683                 ret = -EINVAL;
 684                 goto out;
 685         }
 686         if (new_value < 0) {
 687                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 688                        bond->dev->name, new_value, 1, INT_MAX);
 689                 ret = -EINVAL;
 690                 goto out;
 691         } else {
 692                 if ((new_value % bond->params.miimon) != 0) {
 693                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 694                                    bond->dev->name, new_value,
 695                                    bond->params.miimon,
 696                                    (new_value / bond->params.miimon) *
 697                                    bond->params.miimon);
 698                 }
 699                 bond->params.downdelay = new_value / bond->params.miimon;
 700                 pr_info("%s: Setting down delay to %d.\n",
 701                         bond->dev->name,
 702                         bond->params.downdelay * bond->params.miimon);
 703
 704         }
 705
 706 out:
 707         return ret;
 708 }
 709 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 710                    bonding_show_downdelay, bonding_store_downdelay);
 711
 712 static ssize_t bonding_show_updelay(struct device *d,
 713                                     struct device_attribute *attr,
 714                                     char *buf)
 715 {
 716         struct bonding *bond = to_bond(d);
 717
 718         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 719
 720 }
 721
 722 static ssize_t bonding_store_updelay(struct device *d,
 723                                      struct device_attribute *attr,
 724                                      const char *buf, size_t count)
 725 {
 726         int new_value, ret = count;
 727         struct bonding *bond = to_bond(d);
 728
 729         if (!(bond->params.miimon)) {
 730                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 731                        bond->dev->name);
 732                 ret = -EPERM;
 733                 goto out;
 734         }
 735
 736         if (sscanf(buf, "%d", &new_value) != 1) {
 737                 pr_err("%s: no up delay value specified.\n",
 738                        bond->dev->name);
 739                 ret = -EINVAL;
 740                 goto out;
 741         }
 742         if (new_value < 0) {
 743                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 744                        bond->dev->name, new_value, 1, INT_MAX);
 745                 ret = -EINVAL;
 746                 goto out;
 747         } else {
 748                 if ((new_value % bond->params.miimon) != 0) {
 749                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 750                                    bond->dev->name, new_value,
 751                                    bond->params.miimon,
 752                                    (new_value / bond->params.miimon) *
 753                                    bond->params.miimon);
 754                 }
 755                 bond->params.updelay = new_value / bond->params.miimon;
 756                 pr_info("%s: Setting up delay to %d.\n",
 757                         bond->dev->name,
 758                         bond->params.updelay * bond->params.miimon);
 759         }
 760
 761 out:
 762         return ret;
 763 }
 764 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 765                    bonding_show_updelay, bonding_store_updelay);
 766
 767 /*
 768  * Show and set the LACP interval.  Interface must be down, and the mode
 769  * must be set to 802.3ad mode.
 770  */
 771 static ssize_t bonding_show_lacp(struct device *d,
 772                                  struct device_attribute *attr,
 773                                  char *buf)
 774 {
 775         struct bonding *bond = to_bond(d);
 776
 777         return sprintf(buf, "%s %d\n",
 778                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 779                 bond->params.lacp_fast);
 780 }
 781
 782 static ssize_t bonding_store_lacp(struct device *d,
 783                                   struct device_attribute *attr,
 784                                   const char *buf, size_t count)
 785 {
 786         int new_value, ret = count;
 787         struct bonding *bond = to_bond(d);
 788
 789         if (bond->dev->flags & IFF_UP) {
 790                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 791                        bond->dev->name);
 792                 ret = -EPERM;
 793                 goto out;
 794         }
 795
 796         if (bond->params.mode != BOND_MODE_8023AD) {
 797                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 798                        bond->dev->name);
 799                 ret = -EPERM;
 800                 goto out;
 801         }
 802
 803         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 804
 805         if ((new_value == 1) || (new_value == 0)) {
 806                 bond->params.lacp_fast = new_value;
 807                 bond_3ad_update_lacp_rate(bond);
 808                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 809                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 810                         new_value);
 811         } else {
 812                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 813                        bond->dev->name, (int)strlen(buf) - 1, buf);
 814                 ret = -EINVAL;
 815         }
 816 out:
 817         return ret;
 818 }
 819 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 820                    bonding_show_lacp, bonding_store_lacp);
 821
 822 static ssize_t bonding_show_min_links(struct device *d,
 823                                       struct device_attribute *attr,
 824                                       char *buf)
 825 {
 826         struct bonding *bond = to_bond(d);
 827
 828         return sprintf(buf, "%d\n", bond->params.min_links);
 829 }
 830
 831 static ssize_t bonding_store_min_links(struct device *d,
 832                                        struct device_attribute *attr,
 833                                        const char *buf, size_t count)
 834 {
 835         struct bonding *bond = to_bond(d);
 836         int ret;
 837         unsigned int new_value;
 838
 839         ret = kstrtouint(buf, 0, &new_value);
 840         if (ret < 0) {
 841                 pr_err("%s: Ignoring invalid min links value %s.\n",
 842                        bond->dev->name, buf);
 843                 return ret;
 844         }
 845
 846         pr_info("%s: Setting min links value to %u\n",
 847                 bond->dev->name, new_value);
 848         bond->params.min_links = new_value;
 849         return count;
 850 }
 851 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 852                    bonding_show_min_links, bonding_store_min_links);
 853
 854 static ssize_t bonding_show_ad_select(struct device *d,
 855                                       struct device_attribute *attr,
 856                                       char *buf)
 857 {
 858         struct bonding *bond = to_bond(d);
 859
 860         return sprintf(buf, "%s %d\n",
 861                 ad_select_tbl[bond->params.ad_select].modename,
 862                 bond->params.ad_select);
 863 }
 864
 865
 866 static ssize_t bonding_store_ad_select(struct device *d,
 867                                        struct device_attribute *attr,
 868                                        const char *buf, size_t count)
 869 {
 870         int new_value, ret = count;
 871         struct bonding *bond = to_bond(d);
 872
 873         if (bond->dev->flags & IFF_UP) {
 874                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 875                        bond->dev->name);
 876                 ret = -EPERM;
 877                 goto out;
 878         }
 879
 880         new_value = bond_parse_parm(buf, ad_select_tbl);
 881
 882         if (new_value != -1) {
 883                 bond->params.ad_select = new_value;
 884                 pr_info("%s: Setting ad_select to %s (%d).\n",
 885                         bond->dev->name, ad_select_tbl[new_value].modename,
 886                         new_value);
 887         } else {
 888                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 889                        bond->dev->name, (int)strlen(buf) - 1, buf);
 890                 ret = -EINVAL;
 891         }
 892 out:
 893         return ret;
 894 }
 895 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 896                    bonding_show_ad_select, bonding_store_ad_select);
 897
 898 /*
 899  * Show and set the number of peer notifications to send after a failover event.
 900  */
 901 static ssize_t bonding_show_num_peer_notif(struct device *d,
 902                                            struct device_attribute *attr,
 903                                            char *buf)
 904 {
 905         struct bonding *bond = to_bond(d);
 906         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 907 }
 908
 909 static ssize_t bonding_store_num_peer_notif(struct device *d,
 910                                             struct device_attribute *attr,
 911                                             const char *buf, size_t count)
 912 {
 913         struct bonding *bond = to_bond(d);
 914         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 915         return err ? err : count;
 916 }
 917 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 918                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 919 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 920                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 921
 922 /*
 923  * Show and set the MII monitor interval.  There are two tricky bits
 924  * here.  First, if MII monitoring is activated, then we must disable
 925  * ARP monitoring.  Second, if the timer isn't running, we must
 926  * start it.
 927  */
 928 static ssize_t bonding_show_miimon(struct device *d,
 929                                    struct device_attribute *attr,
 930                                    char *buf)
 931 {
 932         struct bonding *bond = to_bond(d);
 933
 934         return sprintf(buf, "%d\n", bond->params.miimon);
 935 }
 936
 937 static ssize_t bonding_store_miimon(struct device *d,
 938                                     struct device_attribute *attr,
 939                                     const char *buf, size_t count)
 940 {
 941         int new_value, ret = count;
 942         struct bonding *bond = to_bond(d);
 943
 944         if (sscanf(buf, "%d", &new_value) != 1) {
 945                 pr_err("%s: no miimon value specified.\n",
 946                        bond->dev->name);
 947                 ret = -EINVAL;
 948                 goto out;
 949         }
 950         if (new_value < 0) {
 951                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 952                        bond->dev->name, new_value, 1, INT_MAX);
 953                 ret = -EINVAL;
 954                 goto out;
 955         } else {
 956                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 957                         bond->dev->name, new_value);
 958                 bond->params.miimon = new_value;
 959                 if (bond->params.updelay)
 960                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 961                                 bond->dev->name,
 962                                 bond->params.updelay * bond->params.miimon);
 963                 if (bond->params.downdelay)
 964                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 965                                 bond->dev->name,
 966                                 bond->params.downdelay * bond->params.miimon);
 967                 if (bond->params.arp_interval) {
 968                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 969                                 bond->dev->name);
 970                         bond->params.arp_interval = 0;
 971                         if (bond->params.arp_validate) {
 972                                 bond->params.arp_validate =
 973                                         BOND_ARP_VALIDATE_NONE;
 974                         }
 975                         if (delayed_work_pending(&bond->arp_work)) {
 976                                 cancel_delayed_work(&bond->arp_work);
 977                                 flush_workqueue(bond->wq);
 978                         }
 979                 }
 980
 981                 if (bond->dev->flags & IFF_UP) {
 982                         /* If the interface is up, we may need to fire off
 983                          * the MII timer. If the interface is down, the
 984                          * timer will get fired off when the open function
 985                          * is called.
 986                          */
 987                         if (!delayed_work_pending(&bond->mii_work)) {
 988                                 INIT_DELAYED_WORK(&bond->mii_work,
 989                                                   bond_mii_monitor);
 990                                 queue_delayed_work(bond->wq,
 991                                                    &bond->mii_work, 0);
 992                         }
 993                 }
 994         }
 995 out:
 996         return ret;
 997 }
 998 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 999                    bonding_show_miimon, bonding_store_miimon);
1000
1001 /*
1002  * Show and set the primary slave.  The store function is much
1003  * simpler than bonding_store_slaves function because it only needs to
1004  * handle one interface name.
1005  * The bond must be a mode that supports a primary for this be
1006  * set.
1007  */
1008 static ssize_t bonding_show_primary(struct device *d,
1009                                     struct device_attribute *attr,
1010                                     char *buf)
1011 {
1012         int count = 0;
1013         struct bonding *bond = to_bond(d);
1014
1015         if (bond->primary_slave)
1016                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1017
1018         return count;
1019 }
1020
1021 static ssize_t bonding_store_primary(struct device *d,
1022                                      struct device_attribute *attr,
1023                                      const char *buf, size_t count)
1024 {
1025         int i;
1026         struct slave *slave;
1027         struct bonding *bond = to_bond(d);
1028         char ifname[IFNAMSIZ];
1029
1030         if (!rtnl_trylock())
1031                 return restart_syscall();
1032         block_netpoll_tx();
1033         read_lock(&bond->lock);
1034         write_lock_bh(&bond->curr_slave_lock);
1035
1036         if (!USES_PRIMARY(bond->params.mode)) {
1037                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1038                         bond->dev->name, bond->dev->name, bond->params.mode);
1039                 goto out;
1040         }
1041
1042         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1043
1044         /* check to see if we are clearing primary */
1045         if (!strlen(ifname) || buf[0] == '\n') {
1046                 pr_info("%s: Setting primary slave to None.\n",
1047                         bond->dev->name);
1048                 bond->primary_slave = NULL;
1049                 bond_select_active_slave(bond);
1050                 goto out;
1051         }
1052
1053         bond_for_each_slave(bond, slave, i) {
1054                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1055                         pr_info("%s: Setting %s as primary slave.\n",
1056                                 bond->dev->name, slave->dev->name);
1057                         bond->primary_slave = slave;
1058                         strcpy(bond->params.primary, slave->dev->name);
1059                         bond_select_active_slave(bond);
1060                         goto out;
1061                 }
1062         }
1063
1064         pr_info("%s: Unable to set %.*s as primary slave.\n",
1065                 bond->dev->name, (int)strlen(buf) - 1, buf);
1066 out:
1067         write_unlock_bh(&bond->curr_slave_lock);
1068         read_unlock(&bond->lock);
1069         unblock_netpoll_tx();
1070         rtnl_unlock();
1071
1072         return count;
1073 }
1074 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1075                    bonding_show_primary, bonding_store_primary);
1076
1077 /*
1078  * Show and set the primary_reselect flag.
1079  */
1080 static ssize_t bonding_show_primary_reselect(struct device *d,
1081                                              struct device_attribute *attr,
1082                                              char *buf)
1083 {
1084         struct bonding *bond = to_bond(d);
1085
1086         return sprintf(buf, "%s %d\n",
1087                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1088                        bond->params.primary_reselect);
1089 }
1090
1091 static ssize_t bonding_store_primary_reselect(struct device *d,
1092                                               struct device_attribute *attr,
1093                                               const char *buf, size_t count)
1094 {
1095         int new_value, ret = count;
1096         struct bonding *bond = to_bond(d);
1097
1098         if (!rtnl_trylock())
1099                 return restart_syscall();
1100
1101         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1102         if (new_value < 0)  {
1103                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1104                        bond->dev->name,
1105                        (int) strlen(buf) - 1, buf);
1106                 ret = -EINVAL;
1107                 goto out;
1108         }
1109
1110         bond->params.primary_reselect = new_value;
1111         pr_info("%s: setting primary_reselect to %s (%d).\n",
1112                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1113                 new_value);
1114
1115         block_netpoll_tx();
1116         read_lock(&bond->lock);
1117         write_lock_bh(&bond->curr_slave_lock);
1118         bond_select_active_slave(bond);
1119         write_unlock_bh(&bond->curr_slave_lock);
1120         read_unlock(&bond->lock);
1121         unblock_netpoll_tx();
1122 out:
1123         rtnl_unlock();
1124         return ret;
1125 }
1126 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1127                    bonding_show_primary_reselect,
1128                    bonding_store_primary_reselect);
1129
1130 /*
1131  * Show and set the use_carrier flag.
1132  */
1133 static ssize_t bonding_show_carrier(struct device *d,
1134                                     struct device_attribute *attr,
1135                                     char *buf)
1136 {
1137         struct bonding *bond = to_bond(d);
1138
1139         return sprintf(buf, "%d\n", bond->params.use_carrier);
1140 }
1141
1142 static ssize_t bonding_store_carrier(struct device *d,
1143                                      struct device_attribute *attr,
1144                                      const char *buf, size_t count)
1145 {
1146         int new_value, ret = count;
1147         struct bonding *bond = to_bond(d);
1148
1149
1150         if (sscanf(buf, "%d", &new_value) != 1) {
1151                 pr_err("%s: no use_carrier value specified.\n",
1152                        bond->dev->name);
1153                 ret = -EINVAL;
1154                 goto out;
1155         }
1156         if ((new_value == 0) || (new_value == 1)) {
1157                 bond->params.use_carrier = new_value;
1158                 pr_info("%s: Setting use_carrier to %d.\n",
1159                         bond->dev->name, new_value);
1160         } else {
1161                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1162                         bond->dev->name, new_value);
1163         }
1164 out:
1165         return ret;
1166 }
1167 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1168                    bonding_show_carrier, bonding_store_carrier);
1169
1170
1171 /*
1172  * Show and set currently active_slave.
1173  */
1174 static ssize_t bonding_show_active_slave(struct device *d,
1175                                          struct device_attribute *attr,
1176                                          char *buf)
1177 {
1178         struct slave *curr;
1179         struct bonding *bond = to_bond(d);
1180         int count = 0;
1181
1182         read_lock(&bond->curr_slave_lock);
1183         curr = bond->curr_active_slave;
1184         read_unlock(&bond->curr_slave_lock);
1185
1186         if (USES_PRIMARY(bond->params.mode) && curr)
1187                 count = sprintf(buf, "%s\n", curr->dev->name);
1188         return count;
1189 }
1190
1191 static ssize_t bonding_store_active_slave(struct device *d,
1192                                           struct device_attribute *attr,
1193                                           const char *buf, size_t count)
1194 {
1195         int i;
1196         struct slave *slave;
1197         struct slave *old_active = NULL;
1198         struct slave *new_active = NULL;
1199         struct bonding *bond = to_bond(d);
1200         char ifname[IFNAMSIZ];
1201
1202         if (!rtnl_trylock())
1203                 return restart_syscall();
1204
1205         block_netpoll_tx();
1206         read_lock(&bond->lock);
1207         write_lock_bh(&bond->curr_slave_lock);
1208
1209         if (!USES_PRIMARY(bond->params.mode)) {
1210                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1211                         bond->dev->name, bond->dev->name, bond->params.mode);
1212                 goto out;
1213         }
1214
1215         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1216
1217         /* check to see if we are clearing active */
1218         if (!strlen(ifname) || buf[0] == '\n') {
1219                 pr_info("%s: Clearing current active slave.\n",
1220                         bond->dev->name);
1221                 bond->curr_active_slave = NULL;
1222                 bond_select_active_slave(bond);
1223                 goto out;
1224         }
1225
1226         bond_for_each_slave(bond, slave, i) {
1227                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1228                         old_active = bond->curr_active_slave;
1229                         new_active = slave;
1230                         if (new_active == old_active) {
1231                                 /* do nothing */
1232                                 pr_info("%s: %s is already the current"
1233                                         " active slave.\n",
1234                                         bond->dev->name,
1235                                         slave->dev->name);
1236                                 goto out;
1237                         }
1238                         else {
1239                                 if ((new_active) &&
1240                                     (old_active) &&
1241                                     (new_active->link == BOND_LINK_UP) &&
1242                                     IS_UP(new_active->dev)) {
1243                                         pr_info("%s: Setting %s as active"
1244                                                 " slave.\n",
1245                                                 bond->dev->name,
1246                                                 slave->dev->name);
1247                                         bond_change_active_slave(bond,
1248                                                                  new_active);
1249                                 }
1250                                 else {
1251                                         pr_info("%s: Could not set %s as"
1252                                                 " active slave; either %s is"
1253                                                 " down or the link is down.\n",
1254                                                 bond->dev->name,
1255                                                 slave->dev->name,
1256                                                 slave->dev->name);
1257                                 }
1258                                 goto out;
1259                         }
1260                 }
1261         }
1262
1263         pr_info("%s: Unable to set %.*s as active slave.\n",
1264                 bond->dev->name, (int)strlen(buf) - 1, buf);
1265  out:
1266         write_unlock_bh(&bond->curr_slave_lock);
1267         read_unlock(&bond->lock);
1268         unblock_netpoll_tx();
1269
1270         rtnl_unlock();
1271
1272         return count;
1273
1274 }
1275 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1276                    bonding_show_active_slave, bonding_store_active_slave);
1277
1278
1279 /*
1280  * Show link status of the bond interface.
1281  */
1282 static ssize_t bonding_show_mii_status(struct device *d,
1283                                        struct device_attribute *attr,
1284                                        char *buf)
1285 {
1286         struct slave *curr;
1287         struct bonding *bond = to_bond(d);
1288
1289         read_lock(&bond->curr_slave_lock);
1290         curr = bond->curr_active_slave;
1291         read_unlock(&bond->curr_slave_lock);
1292
1293         return sprintf(buf, "%s\n", curr ? "up" : "down");
1294 }
1295 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1296
1297
1298 /*
1299  * Show current 802.3ad aggregator ID.
1300  */
1301 static ssize_t bonding_show_ad_aggregator(struct device *d,
1302                                           struct device_attribute *attr,
1303                                           char *buf)
1304 {
1305         int count = 0;
1306         struct bonding *bond = to_bond(d);
1307
1308         if (bond->params.mode == BOND_MODE_8023AD) {
1309                 struct ad_info ad_info;
1310                 count = sprintf(buf, "%d\n",
1311                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1312                                 ?  0 : ad_info.aggregator_id);
1313         }
1314
1315         return count;
1316 }
1317 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1318
1319
1320 /*
1321  * Show number of active 802.3ad ports.
1322  */
1323 static ssize_t bonding_show_ad_num_ports(struct device *d,
1324                                          struct device_attribute *attr,
1325                                          char *buf)
1326 {
1327         int count = 0;
1328         struct bonding *bond = to_bond(d);
1329
1330         if (bond->params.mode == BOND_MODE_8023AD) {
1331                 struct ad_info ad_info;
1332                 count = sprintf(buf, "%d\n",
1333                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1334                                 ?  0 : ad_info.ports);
1335         }
1336
1337         return count;
1338 }
1339 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1340
1341
1342 /*
1343  * Show current 802.3ad actor key.
1344  */
1345 static ssize_t bonding_show_ad_actor_key(struct device *d,
1346                                          struct device_attribute *attr,
1347                                          char *buf)
1348 {
1349         int count = 0;
1350         struct bonding *bond = to_bond(d);
1351
1352         if (bond->params.mode == BOND_MODE_8023AD) {
1353                 struct ad_info ad_info;
1354                 count = sprintf(buf, "%d\n",
1355                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1356                                 ?  0 : ad_info.actor_key);
1357         }
1358
1359         return count;
1360 }
1361 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1362
1363
1364 /*
1365  * Show current 802.3ad partner key.
1366  */
1367 static ssize_t bonding_show_ad_partner_key(struct device *d,
1368                                            struct device_attribute *attr,
1369                                            char *buf)
1370 {
1371         int count = 0;
1372         struct bonding *bond = to_bond(d);
1373
1374         if (bond->params.mode == BOND_MODE_8023AD) {
1375                 struct ad_info ad_info;
1376                 count = sprintf(buf, "%d\n",
1377                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1378                                 ?  0 : ad_info.partner_key);
1379         }
1380
1381         return count;
1382 }
1383 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1384
1385
1386 /*
1387  * Show current 802.3ad partner mac.
1388  */
1389 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1390                                            struct device_attribute *attr,
1391                                            char *buf)
1392 {
1393         int count = 0;
1394         struct bonding *bond = to_bond(d);
1395
1396         if (bond->params.mode == BOND_MODE_8023AD) {
1397                 struct ad_info ad_info;
1398                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1399                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1400         }
1401
1402         return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1405
1406 /*
1407  * Show the queue_ids of the slaves in the current bond.
1408  */
1409 static ssize_t bonding_show_queue_id(struct device *d,
1410                                      struct device_attribute *attr,
1411                                      char *buf)
1412 {
1413         struct slave *slave;
1414         int i, res = 0;
1415         struct bonding *bond = to_bond(d);
1416
1417         if (!rtnl_trylock())
1418                 return restart_syscall();
1419
1420         read_lock(&bond->lock);
1421         bond_for_each_slave(bond, slave, i) {
1422                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1423                         /* not enough space for another interface_name:queue_id pair */
1424                         if ((PAGE_SIZE - res) > 10)
1425                                 res = PAGE_SIZE - 10;
1426                         res += sprintf(buf + res, "++more++ ");
1427                         break;
1428                 }
1429                 res += sprintf(buf + res, "%s:%d ",
1430                                slave->dev->name, slave->queue_id);
1431         }
1432         read_unlock(&bond->lock);
1433         if (res)
1434                 buf[res-1] = '\n'; /* eat the leftover space */
1435         rtnl_unlock();
1436         return res;
1437 }
1438
1439 /*
1440  * Set the queue_ids of the  slaves in the current bond.  The bond
1441  * interface must be enslaved for this to work.
1442  */
1443 static ssize_t bonding_store_queue_id(struct device *d,
1444                                       struct device_attribute *attr,
1445                                       const char *buffer, size_t count)
1446 {
1447         struct slave *slave, *update_slave;
1448         struct bonding *bond = to_bond(d);
1449         u16 qid;
1450         int i, ret = count;
1451         char *delim;
1452         struct net_device *sdev = NULL;
1453
1454         if (!rtnl_trylock())
1455                 return restart_syscall();
1456
1457         /* delim will point to queue id if successful */
1458         delim = strchr(buffer, ':');
1459         if (!delim)
1460                 goto err_no_cmd;
1461
1462         /*
1463          * Terminate string that points to device name and bump it
1464          * up one, so we can read the queue id there.
1465          */
1466         *delim = '\0';
1467         if (sscanf(++delim, "%hd\n", &qid) != 1)
1468                 goto err_no_cmd;
1469
1470         /* Check buffer length, valid ifname and queue id */
1471         if (strlen(buffer) > IFNAMSIZ ||
1472             !dev_valid_name(buffer) ||
1473             qid > bond->params.tx_queues)
1474                 goto err_no_cmd;
1475
1476         /* Get the pointer to that interface if it exists */
1477         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1478         if (!sdev)
1479                 goto err_no_cmd;
1480
1481         read_lock(&bond->lock);
1482
1483         /* Search for thes slave and check for duplicate qids */
1484         update_slave = NULL;
1485         bond_for_each_slave(bond, slave, i) {
1486                 if (sdev == slave->dev)
1487                         /*
1488                          * We don't need to check the matching
1489                          * slave for dups, since we're overwriting it
1490                          */
1491                         update_slave = slave;
1492                 else if (qid && qid == slave->queue_id) {
1493                         goto err_no_cmd_unlock;
1494                 }
1495         }
1496
1497         if (!update_slave)
1498                 goto err_no_cmd_unlock;
1499
1500         /* Actually set the qids for the slave */
1501         update_slave->queue_id = qid;
1502
1503         read_unlock(&bond->lock);
1504 out:
1505         rtnl_unlock();
1506         return ret;
1507
1508 err_no_cmd_unlock:
1509         read_unlock(&bond->lock);
1510 err_no_cmd:
1511         pr_info("invalid input for queue_id set for %s.\n",
1512                 bond->dev->name);
1513         ret = -EPERM;
1514         goto out;
1515 }
1516
1517 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1518                    bonding_store_queue_id);
1519
1520
1521 /*
1522  * Show and set the all_slaves_active flag.
1523  */
1524 static ssize_t bonding_show_slaves_active(struct device *d,
1525                                           struct device_attribute *attr,
1526                                           char *buf)
1527 {
1528         struct bonding *bond = to_bond(d);
1529
1530         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1531 }
1532
1533 static ssize_t bonding_store_slaves_active(struct device *d,
1534                                            struct device_attribute *attr,
1535                                            const char *buf, size_t count)
1536 {
1537         int i, new_value, ret = count;
1538         struct bonding *bond = to_bond(d);
1539         struct slave *slave;
1540
1541         if (sscanf(buf, "%d", &new_value) != 1) {
1542                 pr_err("%s: no all_slaves_active value specified.\n",
1543                        bond->dev->name);
1544                 ret = -EINVAL;
1545                 goto out;
1546         }
1547
1548         if (new_value == bond->params.all_slaves_active)
1549                 goto out;
1550
1551         if ((new_value == 0) || (new_value == 1)) {
1552                 bond->params.all_slaves_active = new_value;
1553         } else {
1554                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1555                         bond->dev->name, new_value);
1556                 ret = -EINVAL;
1557                 goto out;
1558         }
1559
1560         bond_for_each_slave(bond, slave, i) {
1561                 if (!bond_is_active_slave(slave)) {
1562                         if (new_value)
1563                                 slave->inactive = 0;
1564                         else
1565                                 slave->inactive = 1;
1566                 }
1567         }
1568 out:
1569         return ret;
1570 }
1571 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1572                    bonding_show_slaves_active, bonding_store_slaves_active);
1573
1574 /*
1575  * Show and set the number of IGMP membership reports to send on link failure
1576  */
1577 static ssize_t bonding_show_resend_igmp(struct device *d,
1578                                         struct device_attribute *attr,
1579                                         char *buf)
1580 {
1581         struct bonding *bond = to_bond(d);
1582
1583         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1584 }
1585
1586 static ssize_t bonding_store_resend_igmp(struct device *d,
1587                                          struct device_attribute *attr,
1588                                          const char *buf, size_t count)
1589 {
1590         int new_value, ret = count;
1591         struct bonding *bond = to_bond(d);
1592
1593         if (sscanf(buf, "%d", &new_value) != 1) {
1594                 pr_err("%s: no resend_igmp value specified.\n",
1595                        bond->dev->name);
1596                 ret = -EINVAL;
1597                 goto out;
1598         }
1599
1600         if (new_value < 0 || new_value > 255) {
1601                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1602                        bond->dev->name, new_value);
1603                 ret = -EINVAL;
1604                 goto out;
1605         }
1606
1607         pr_info("%s: Setting resend_igmp to %d.\n",
1608                 bond->dev->name, new_value);
1609         bond->params.resend_igmp = new_value;
1610 out:
1611         return ret;
1612 }
1613
1614 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1615                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1616
1617 static struct attribute *per_bond_attrs[] = {
1618         &dev_attr_slaves.attr,
1619         &dev_attr_mode.attr,
1620         &dev_attr_fail_over_mac.attr,
1621         &dev_attr_arp_validate.attr,
1622         &dev_attr_arp_interval.attr,
1623         &dev_attr_arp_ip_target.attr,
1624         &dev_attr_downdelay.attr,
1625         &dev_attr_updelay.attr,
1626         &dev_attr_lacp_rate.attr,
1627         &dev_attr_ad_select.attr,
1628         &dev_attr_xmit_hash_policy.attr,
1629         &dev_attr_num_grat_arp.attr,
1630         &dev_attr_num_unsol_na.attr,
1631         &dev_attr_miimon.attr,
1632         &dev_attr_primary.attr,
1633         &dev_attr_primary_reselect.attr,
1634         &dev_attr_use_carrier.attr,
1635         &dev_attr_active_slave.attr,
1636         &dev_attr_mii_status.attr,
1637         &dev_attr_ad_aggregator.attr,
1638         &dev_attr_ad_num_ports.attr,
1639         &dev_attr_ad_actor_key.attr,
1640         &dev_attr_ad_partner_key.attr,
1641         &dev_attr_ad_partner_mac.attr,
1642         &dev_attr_queue_id.attr,
1643         &dev_attr_all_slaves_active.attr,
1644         &dev_attr_resend_igmp.attr,
1645         &dev_attr_min_links.attr,
1646         NULL,
1647 };
1648
1649 static struct attribute_group bonding_group = {
1650         .name = "bonding",
1651         .attrs = per_bond_attrs,
1652 };
1653
1654 /*
1655  * Initialize sysfs.  This sets up the bonding_masters file in
1656  * /sys/class/net.
1657  */
1658 int bond_create_sysfs(void)
1659 {
1660         int ret;
1661
1662         ret = netdev_class_create_file(&class_attr_bonding_masters);
1663         /*
1664          * Permit multiple loads of the module by ignoring failures to
1665          * create the bonding_masters sysfs file.  Bonding devices
1666          * created by second or subsequent loads of the module will
1667          * not be listed in, or controllable by, bonding_masters, but
1668          * will have the usual "bonding" sysfs directory.
1669          *
1670          * This is done to preserve backwards compatibility for
1671          * initscripts/sysconfig, which load bonding multiple times to
1672          * configure multiple bonding devices.
1673          */
1674         if (ret == -EEXIST) {
1675                 /* Is someone being kinky and naming a device bonding_master? */
1676                 if (__dev_get_by_name(&init_net,
1677                                       class_attr_bonding_masters.attr.name))
1678                         pr_err("network device named %s already exists in sysfs",
1679                                class_attr_bonding_masters.attr.name);
1680                 ret = 0;
1681         }
1682
1683         return ret;
1684
1685 }
1686
1687 /*
1688  * Remove /sys/class/net/bonding_masters.
1689  */
1690 void bond_destroy_sysfs(void)
1691 {
1692         netdev_class_remove_file(&class_attr_bonding_masters);
1693 }
1694
1695 /*
1696  * Initialize sysfs for each bond.  This sets up and registers
1697  * the 'bondctl' directory for each individual bond under /sys/class/net.
1698  */
1699 void bond_prepare_sysfs_group(struct bonding *bond)
1700 {
1701         bond->dev->sysfs_groups[0] = &bonding_group;
1702 }
1703