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                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 808                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 809                         new_value);
 810         } else {
 811                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 812                        bond->dev->name, (int)strlen(buf) - 1, buf);
 813                 ret = -EINVAL;
 814         }
 815 out:
 816         return ret;
 817 }
 818 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 819                    bonding_show_lacp, bonding_store_lacp);
 820
 821 static ssize_t bonding_show_ad_select(struct device *d,
 822                                       struct device_attribute *attr,
 823                                       char *buf)
 824 {
 825         struct bonding *bond = to_bond(d);
 826
 827         return sprintf(buf, "%s %d\n",
 828                 ad_select_tbl[bond->params.ad_select].modename,
 829                 bond->params.ad_select);
 830 }
 831
 832
 833 static ssize_t bonding_store_ad_select(struct device *d,
 834                                        struct device_attribute *attr,
 835                                        const char *buf, size_t count)
 836 {
 837         int new_value, ret = count;
 838         struct bonding *bond = to_bond(d);
 839
 840         if (bond->dev->flags & IFF_UP) {
 841                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 842                        bond->dev->name);
 843                 ret = -EPERM;
 844                 goto out;
 845         }
 846
 847         new_value = bond_parse_parm(buf, ad_select_tbl);
 848
 849         if (new_value != -1) {
 850                 bond->params.ad_select = new_value;
 851                 pr_info("%s: Setting ad_select to %s (%d).\n",
 852                         bond->dev->name, ad_select_tbl[new_value].modename,
 853                         new_value);
 854         } else {
 855                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 856                        bond->dev->name, (int)strlen(buf) - 1, buf);
 857                 ret = -EINVAL;
 858         }
 859 out:
 860         return ret;
 861 }
 862 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 863                    bonding_show_ad_select, bonding_store_ad_select);
 864
 865 /*
 866  * Show and set the number of peer notifications to send after a failover event.
 867  */
 868 static ssize_t bonding_show_num_peer_notif(struct device *d,
 869                                            struct device_attribute *attr,
 870                                            char *buf)
 871 {
 872         struct bonding *bond = to_bond(d);
 873         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 874 }
 875
 876 static ssize_t bonding_store_num_peer_notif(struct device *d,
 877                                             struct device_attribute *attr,
 878                                             const char *buf, size_t count)
 879 {
 880         struct bonding *bond = to_bond(d);
 881         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 882         return err ? err : count;
 883 }
 884 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 885                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 886 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 887                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 888
 889 /*
 890  * Show and set the MII monitor interval.  There are two tricky bits
 891  * here.  First, if MII monitoring is activated, then we must disable
 892  * ARP monitoring.  Second, if the timer isn't running, we must
 893  * start it.
 894  */
 895 static ssize_t bonding_show_miimon(struct device *d,
 896                                    struct device_attribute *attr,
 897                                    char *buf)
 898 {
 899         struct bonding *bond = to_bond(d);
 900
 901         return sprintf(buf, "%d\n", bond->params.miimon);
 902 }
 903
 904 static ssize_t bonding_store_miimon(struct device *d,
 905                                     struct device_attribute *attr,
 906                                     const char *buf, size_t count)
 907 {
 908         int new_value, ret = count;
 909         struct bonding *bond = to_bond(d);
 910
 911         if (sscanf(buf, "%d", &new_value) != 1) {
 912                 pr_err("%s: no miimon value specified.\n",
 913                        bond->dev->name);
 914                 ret = -EINVAL;
 915                 goto out;
 916         }
 917         if (new_value < 0) {
 918                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 919                        bond->dev->name, new_value, 1, INT_MAX);
 920                 ret = -EINVAL;
 921                 goto out;
 922         } else {
 923                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 924                         bond->dev->name, new_value);
 925                 bond->params.miimon = new_value;
 926                 if (bond->params.updelay)
 927                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 928                                 bond->dev->name,
 929                                 bond->params.updelay * bond->params.miimon);
 930                 if (bond->params.downdelay)
 931                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 932                                 bond->dev->name,
 933                                 bond->params.downdelay * bond->params.miimon);
 934                 if (bond->params.arp_interval) {
 935                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 936                                 bond->dev->name);
 937                         bond->params.arp_interval = 0;
 938                         if (bond->params.arp_validate) {
 939                                 bond->params.arp_validate =
 940                                         BOND_ARP_VALIDATE_NONE;
 941                         }
 942                         if (delayed_work_pending(&bond->arp_work)) {
 943                                 cancel_delayed_work(&bond->arp_work);
 944                                 flush_workqueue(bond->wq);
 945                         }
 946                 }
 947
 948                 if (bond->dev->flags & IFF_UP) {
 949                         /* If the interface is up, we may need to fire off
 950                          * the MII timer. If the interface is down, the
 951                          * timer will get fired off when the open function
 952                          * is called.
 953                          */
 954                         if (!delayed_work_pending(&bond->mii_work)) {
 955                                 INIT_DELAYED_WORK(&bond->mii_work,
 956                                                   bond_mii_monitor);
 957                                 queue_delayed_work(bond->wq,
 958                                                    &bond->mii_work, 0);
 959                         }
 960                 }
 961         }
 962 out:
 963         return ret;
 964 }
 965 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 966                    bonding_show_miimon, bonding_store_miimon);
 967
 968 /*
 969  * Show and set the primary slave.  The store function is much
 970  * simpler than bonding_store_slaves function because it only needs to
 971  * handle one interface name.
 972  * The bond must be a mode that supports a primary for this be
 973  * set.
 974  */
 975 static ssize_t bonding_show_primary(struct device *d,
 976                                     struct device_attribute *attr,
 977                                     char *buf)
 978 {
 979         int count = 0;
 980         struct bonding *bond = to_bond(d);
 981
 982         if (bond->primary_slave)
 983                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
 984
 985         return count;
 986 }
 987
 988 static ssize_t bonding_store_primary(struct device *d,
 989                                      struct device_attribute *attr,
 990                                      const char *buf, size_t count)
 991 {
 992         int i;
 993         struct slave *slave;
 994         struct bonding *bond = to_bond(d);
 995
 996         if (!rtnl_trylock())
 997                 return restart_syscall();
 998         block_netpoll_tx();
 999         read_lock(&bond->lock);
1000         write_lock_bh(&bond->curr_slave_lock);
1001
1002         if (!USES_PRIMARY(bond->params.mode)) {
1003                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1004                         bond->dev->name, bond->dev->name, bond->params.mode);
1005         } else {
1006                 bond_for_each_slave(bond, slave, i) {
1007                         if (strnicmp
1008                             (slave->dev->name, buf,
1009                              strlen(slave->dev->name)) == 0) {
1010                                 pr_info("%s: Setting %s as primary slave.\n",
1011                                         bond->dev->name, slave->dev->name);
1012                                 bond->primary_slave = slave;
1013                                 strcpy(bond->params.primary, slave->dev->name);
1014                                 bond_select_active_slave(bond);
1015                                 goto out;
1016                         }
1017                 }
1018
1019                 /* if we got here, then we didn't match the name of any slave */
1020
1021                 if (strlen(buf) == 0 || buf[0] == '\n') {
1022                         pr_info("%s: Setting primary slave to None.\n",
1023                                 bond->dev->name);
1024                         bond->primary_slave = NULL;
1025                                 bond_select_active_slave(bond);
1026                 } else {
1027                         pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1028                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1029                 }
1030         }
1031 out:
1032         write_unlock_bh(&bond->curr_slave_lock);
1033         read_unlock(&bond->lock);
1034         unblock_netpoll_tx();
1035         rtnl_unlock();
1036
1037         return count;
1038 }
1039 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1040                    bonding_show_primary, bonding_store_primary);
1041
1042 /*
1043  * Show and set the primary_reselect flag.
1044  */
1045 static ssize_t bonding_show_primary_reselect(struct device *d,
1046                                              struct device_attribute *attr,
1047                                              char *buf)
1048 {
1049         struct bonding *bond = to_bond(d);
1050
1051         return sprintf(buf, "%s %d\n",
1052                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1053                        bond->params.primary_reselect);
1054 }
1055
1056 static ssize_t bonding_store_primary_reselect(struct device *d,
1057                                               struct device_attribute *attr,
1058                                               const char *buf, size_t count)
1059 {
1060         int new_value, ret = count;
1061         struct bonding *bond = to_bond(d);
1062
1063         if (!rtnl_trylock())
1064                 return restart_syscall();
1065
1066         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1067         if (new_value < 0)  {
1068                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1069                        bond->dev->name,
1070                        (int) strlen(buf) - 1, buf);
1071                 ret = -EINVAL;
1072                 goto out;
1073         }
1074
1075         bond->params.primary_reselect = new_value;
1076         pr_info("%s: setting primary_reselect to %s (%d).\n",
1077                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1078                 new_value);
1079
1080         block_netpoll_tx();
1081         read_lock(&bond->lock);
1082         write_lock_bh(&bond->curr_slave_lock);
1083         bond_select_active_slave(bond);
1084         write_unlock_bh(&bond->curr_slave_lock);
1085         read_unlock(&bond->lock);
1086         unblock_netpoll_tx();
1087 out:
1088         rtnl_unlock();
1089         return ret;
1090 }
1091 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1092                    bonding_show_primary_reselect,
1093                    bonding_store_primary_reselect);
1094
1095 /*
1096  * Show and set the use_carrier flag.
1097  */
1098 static ssize_t bonding_show_carrier(struct device *d,
1099                                     struct device_attribute *attr,
1100                                     char *buf)
1101 {
1102         struct bonding *bond = to_bond(d);
1103
1104         return sprintf(buf, "%d\n", bond->params.use_carrier);
1105 }
1106
1107 static ssize_t bonding_store_carrier(struct device *d,
1108                                      struct device_attribute *attr,
1109                                      const char *buf, size_t count)
1110 {
1111         int new_value, ret = count;
1112         struct bonding *bond = to_bond(d);
1113
1114
1115         if (sscanf(buf, "%d", &new_value) != 1) {
1116                 pr_err("%s: no use_carrier value specified.\n",
1117                        bond->dev->name);
1118                 ret = -EINVAL;
1119                 goto out;
1120         }
1121         if ((new_value == 0) || (new_value == 1)) {
1122                 bond->params.use_carrier = new_value;
1123                 pr_info("%s: Setting use_carrier to %d.\n",
1124                         bond->dev->name, new_value);
1125         } else {
1126                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1127                         bond->dev->name, new_value);
1128         }
1129 out:
1130         return ret;
1131 }
1132 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1133                    bonding_show_carrier, bonding_store_carrier);
1134
1135
1136 /*
1137  * Show and set currently active_slave.
1138  */
1139 static ssize_t bonding_show_active_slave(struct device *d,
1140                                          struct device_attribute *attr,
1141                                          char *buf)
1142 {
1143         struct slave *curr;
1144         struct bonding *bond = to_bond(d);
1145         int count = 0;
1146
1147         read_lock(&bond->curr_slave_lock);
1148         curr = bond->curr_active_slave;
1149         read_unlock(&bond->curr_slave_lock);
1150
1151         if (USES_PRIMARY(bond->params.mode) && curr)
1152                 count = sprintf(buf, "%s\n", curr->dev->name);
1153         return count;
1154 }
1155
1156 static ssize_t bonding_store_active_slave(struct device *d,
1157                                           struct device_attribute *attr,
1158                                           const char *buf, size_t count)
1159 {
1160         int i;
1161         struct slave *slave;
1162         struct slave *old_active = NULL;
1163         struct slave *new_active = NULL;
1164         struct bonding *bond = to_bond(d);
1165
1166         if (!rtnl_trylock())
1167                 return restart_syscall();
1168
1169         block_netpoll_tx();
1170         read_lock(&bond->lock);
1171         write_lock_bh(&bond->curr_slave_lock);
1172
1173         if (!USES_PRIMARY(bond->params.mode))
1174                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1175                         bond->dev->name, bond->dev->name, bond->params.mode);
1176         else {
1177                 bond_for_each_slave(bond, slave, i) {
1178                         if (strnicmp
1179                             (slave->dev->name, buf,
1180                              strlen(slave->dev->name)) == 0) {
1181                                 old_active = bond->curr_active_slave;
1182                                 new_active = slave;
1183                                 if (new_active == old_active) {
1184                                         /* do nothing */
1185                                         pr_info("%s: %s is already the current active slave.\n",
1186                                                 bond->dev->name,
1187                                                 slave->dev->name);
1188                                         goto out;
1189                                 }
1190                                 else {
1191                                         if ((new_active) &&
1192                                             (old_active) &&
1193                                             (new_active->link == BOND_LINK_UP) &&
1194                                             IS_UP(new_active->dev)) {
1195                                                 pr_info("%s: Setting %s as active slave.\n",
1196                                                         bond->dev->name,
1197                                                         slave->dev->name);
1198                                                         bond_change_active_slave(bond, new_active);
1199                                         }
1200                                         else {
1201                                                 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1202                                                         bond->dev->name,
1203                                                         slave->dev->name,
1204                                                         slave->dev->name);
1205                                         }
1206                                         goto out;
1207                                 }
1208                         }
1209                 }
1210
1211                 /* if we got here, then we didn't match the name of any slave */
1212
1213                 if (strlen(buf) == 0 || buf[0] == '\n') {
1214                         pr_info("%s: Setting active slave to None.\n",
1215                                 bond->dev->name);
1216                         bond->primary_slave = NULL;
1217                         bond_select_active_slave(bond);
1218                 } else {
1219                         pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1220                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1221                 }
1222         }
1223  out:
1224         write_unlock_bh(&bond->curr_slave_lock);
1225         read_unlock(&bond->lock);
1226         unblock_netpoll_tx();
1227
1228         rtnl_unlock();
1229
1230         return count;
1231
1232 }
1233 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1234                    bonding_show_active_slave, bonding_store_active_slave);
1235
1236
1237 /*
1238  * Show link status of the bond interface.
1239  */
1240 static ssize_t bonding_show_mii_status(struct device *d,
1241                                        struct device_attribute *attr,
1242                                        char *buf)
1243 {
1244         struct slave *curr;
1245         struct bonding *bond = to_bond(d);
1246
1247         read_lock(&bond->curr_slave_lock);
1248         curr = bond->curr_active_slave;
1249         read_unlock(&bond->curr_slave_lock);
1250
1251         return sprintf(buf, "%s\n", curr ? "up" : "down");
1252 }
1253 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1254
1255
1256 /*
1257  * Show current 802.3ad aggregator ID.
1258  */
1259 static ssize_t bonding_show_ad_aggregator(struct device *d,
1260                                           struct device_attribute *attr,
1261                                           char *buf)
1262 {
1263         int count = 0;
1264         struct bonding *bond = to_bond(d);
1265
1266         if (bond->params.mode == BOND_MODE_8023AD) {
1267                 struct ad_info ad_info;
1268                 count = sprintf(buf, "%d\n",
1269                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1270                                 ?  0 : ad_info.aggregator_id);
1271         }
1272
1273         return count;
1274 }
1275 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1276
1277
1278 /*
1279  * Show number of active 802.3ad ports.
1280  */
1281 static ssize_t bonding_show_ad_num_ports(struct device *d,
1282                                          struct device_attribute *attr,
1283                                          char *buf)
1284 {
1285         int count = 0;
1286         struct bonding *bond = to_bond(d);
1287
1288         if (bond->params.mode == BOND_MODE_8023AD) {
1289                 struct ad_info ad_info;
1290                 count = sprintf(buf, "%d\n",
1291                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1292                                 ?  0 : ad_info.ports);
1293         }
1294
1295         return count;
1296 }
1297 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1298
1299
1300 /*
1301  * Show current 802.3ad actor key.
1302  */
1303 static ssize_t bonding_show_ad_actor_key(struct device *d,
1304                                          struct device_attribute *attr,
1305                                          char *buf)
1306 {
1307         int count = 0;
1308         struct bonding *bond = to_bond(d);
1309
1310         if (bond->params.mode == BOND_MODE_8023AD) {
1311                 struct ad_info ad_info;
1312                 count = sprintf(buf, "%d\n",
1313                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1314                                 ?  0 : ad_info.actor_key);
1315         }
1316
1317         return count;
1318 }
1319 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1320
1321
1322 /*
1323  * Show current 802.3ad partner key.
1324  */
1325 static ssize_t bonding_show_ad_partner_key(struct device *d,
1326                                            struct device_attribute *attr,
1327                                            char *buf)
1328 {
1329         int count = 0;
1330         struct bonding *bond = to_bond(d);
1331
1332         if (bond->params.mode == BOND_MODE_8023AD) {
1333                 struct ad_info ad_info;
1334                 count = sprintf(buf, "%d\n",
1335                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1336                                 ?  0 : ad_info.partner_key);
1337         }
1338
1339         return count;
1340 }
1341 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1342
1343
1344 /*
1345  * Show current 802.3ad partner mac.
1346  */
1347 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1348                                            struct device_attribute *attr,
1349                                            char *buf)
1350 {
1351         int count = 0;
1352         struct bonding *bond = to_bond(d);
1353
1354         if (bond->params.mode == BOND_MODE_8023AD) {
1355                 struct ad_info ad_info;
1356                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1357                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1358         }
1359
1360         return count;
1361 }
1362 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1363
1364 /*
1365  * Show the queue_ids of the slaves in the current bond.
1366  */
1367 static ssize_t bonding_show_queue_id(struct device *d,
1368                                      struct device_attribute *attr,
1369                                      char *buf)
1370 {
1371         struct slave *slave;
1372         int i, res = 0;
1373         struct bonding *bond = to_bond(d);
1374
1375         if (!rtnl_trylock())
1376                 return restart_syscall();
1377
1378         read_lock(&bond->lock);
1379         bond_for_each_slave(bond, slave, i) {
1380                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1381                         /* not enough space for another interface_name:queue_id pair */
1382                         if ((PAGE_SIZE - res) > 10)
1383                                 res = PAGE_SIZE - 10;
1384                         res += sprintf(buf + res, "++more++ ");
1385                         break;
1386                 }
1387                 res += sprintf(buf + res, "%s:%d ",
1388                                slave->dev->name, slave->queue_id);
1389         }
1390         read_unlock(&bond->lock);
1391         if (res)
1392                 buf[res-1] = '\n'; /* eat the leftover space */
1393         rtnl_unlock();
1394         return res;
1395 }
1396
1397 /*
1398  * Set the queue_ids of the  slaves in the current bond.  The bond
1399  * interface must be enslaved for this to work.
1400  */
1401 static ssize_t bonding_store_queue_id(struct device *d,
1402                                       struct device_attribute *attr,
1403                                       const char *buffer, size_t count)
1404 {
1405         struct slave *slave, *update_slave;
1406         struct bonding *bond = to_bond(d);
1407         u16 qid;
1408         int i, ret = count;
1409         char *delim;
1410         struct net_device *sdev = NULL;
1411
1412         if (!rtnl_trylock())
1413                 return restart_syscall();
1414
1415         /* delim will point to queue id if successful */
1416         delim = strchr(buffer, ':');
1417         if (!delim)
1418                 goto err_no_cmd;
1419
1420         /*
1421          * Terminate string that points to device name and bump it
1422          * up one, so we can read the queue id there.
1423          */
1424         *delim = '\0';
1425         if (sscanf(++delim, "%hd\n", &qid) != 1)
1426                 goto err_no_cmd;
1427
1428         /* Check buffer length, valid ifname and queue id */
1429         if (strlen(buffer) > IFNAMSIZ ||
1430             !dev_valid_name(buffer) ||
1431             qid > bond->params.tx_queues)
1432                 goto err_no_cmd;
1433
1434         /* Get the pointer to that interface if it exists */
1435         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1436         if (!sdev)
1437                 goto err_no_cmd;
1438
1439         read_lock(&bond->lock);
1440
1441         /* Search for thes slave and check for duplicate qids */
1442         update_slave = NULL;
1443         bond_for_each_slave(bond, slave, i) {
1444                 if (sdev == slave->dev)
1445                         /*
1446                          * We don't need to check the matching
1447                          * slave for dups, since we're overwriting it
1448                          */
1449                         update_slave = slave;
1450                 else if (qid && qid == slave->queue_id) {
1451                         goto err_no_cmd_unlock;
1452                 }
1453         }
1454
1455         if (!update_slave)
1456                 goto err_no_cmd_unlock;
1457
1458         /* Actually set the qids for the slave */
1459         update_slave->queue_id = qid;
1460
1461         read_unlock(&bond->lock);
1462 out:
1463         rtnl_unlock();
1464         return ret;
1465
1466 err_no_cmd_unlock:
1467         read_unlock(&bond->lock);
1468 err_no_cmd:
1469         pr_info("invalid input for queue_id set for %s.\n",
1470                 bond->dev->name);
1471         ret = -EPERM;
1472         goto out;
1473 }
1474
1475 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1476                    bonding_store_queue_id);
1477
1478
1479 /*
1480  * Show and set the all_slaves_active flag.
1481  */
1482 static ssize_t bonding_show_slaves_active(struct device *d,
1483                                           struct device_attribute *attr,
1484                                           char *buf)
1485 {
1486         struct bonding *bond = to_bond(d);
1487
1488         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1489 }
1490
1491 static ssize_t bonding_store_slaves_active(struct device *d,
1492                                            struct device_attribute *attr,
1493                                            const char *buf, size_t count)
1494 {
1495         int i, new_value, ret = count;
1496         struct bonding *bond = to_bond(d);
1497         struct slave *slave;
1498
1499         if (sscanf(buf, "%d", &new_value) != 1) {
1500                 pr_err("%s: no all_slaves_active value specified.\n",
1501                        bond->dev->name);
1502                 ret = -EINVAL;
1503                 goto out;
1504         }
1505
1506         if (new_value == bond->params.all_slaves_active)
1507                 goto out;
1508
1509         if ((new_value == 0) || (new_value == 1)) {
1510                 bond->params.all_slaves_active = new_value;
1511         } else {
1512                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1513                         bond->dev->name, new_value);
1514                 ret = -EINVAL;
1515                 goto out;
1516         }
1517
1518         bond_for_each_slave(bond, slave, i) {
1519                 if (!bond_is_active_slave(slave)) {
1520                         if (new_value)
1521                                 slave->inactive = 0;
1522                         else
1523                                 slave->inactive = 1;
1524                 }
1525         }
1526 out:
1527         return ret;
1528 }
1529 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1530                    bonding_show_slaves_active, bonding_store_slaves_active);
1531
1532 /*
1533  * Show and set the number of IGMP membership reports to send on link failure
1534  */
1535 static ssize_t bonding_show_resend_igmp(struct device *d,
1536                                         struct device_attribute *attr,
1537                                         char *buf)
1538 {
1539         struct bonding *bond = to_bond(d);
1540
1541         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1542 }
1543
1544 static ssize_t bonding_store_resend_igmp(struct device *d,
1545                                          struct device_attribute *attr,
1546                                          const char *buf, size_t count)
1547 {
1548         int new_value, ret = count;
1549         struct bonding *bond = to_bond(d);
1550
1551         if (sscanf(buf, "%d", &new_value) != 1) {
1552                 pr_err("%s: no resend_igmp value specified.\n",
1553                        bond->dev->name);
1554                 ret = -EINVAL;
1555                 goto out;
1556         }
1557
1558         if (new_value < 0 || new_value > 255) {
1559                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1560                        bond->dev->name, new_value);
1561                 ret = -EINVAL;
1562                 goto out;
1563         }
1564
1565         pr_info("%s: Setting resend_igmp to %d.\n",
1566                 bond->dev->name, new_value);
1567         bond->params.resend_igmp = new_value;
1568 out:
1569         return ret;
1570 }
1571
1572 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1573                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1574
1575 static struct attribute *per_bond_attrs[] = {
1576         &dev_attr_slaves.attr,
1577         &dev_attr_mode.attr,
1578         &dev_attr_fail_over_mac.attr,
1579         &dev_attr_arp_validate.attr,
1580         &dev_attr_arp_interval.attr,
1581         &dev_attr_arp_ip_target.attr,
1582         &dev_attr_downdelay.attr,
1583         &dev_attr_updelay.attr,
1584         &dev_attr_lacp_rate.attr,
1585         &dev_attr_ad_select.attr,
1586         &dev_attr_xmit_hash_policy.attr,
1587         &dev_attr_num_grat_arp.attr,
1588         &dev_attr_num_unsol_na.attr,
1589         &dev_attr_miimon.attr,
1590         &dev_attr_primary.attr,
1591         &dev_attr_primary_reselect.attr,
1592         &dev_attr_use_carrier.attr,
1593         &dev_attr_active_slave.attr,
1594         &dev_attr_mii_status.attr,
1595         &dev_attr_ad_aggregator.attr,
1596         &dev_attr_ad_num_ports.attr,
1597         &dev_attr_ad_actor_key.attr,
1598         &dev_attr_ad_partner_key.attr,
1599         &dev_attr_ad_partner_mac.attr,
1600         &dev_attr_queue_id.attr,
1601         &dev_attr_all_slaves_active.attr,
1602         &dev_attr_resend_igmp.attr,
1603         NULL,
1604 };
1605
1606 static struct attribute_group bonding_group = {
1607         .name = "bonding",
1608         .attrs = per_bond_attrs,
1609 };
1610
1611 /*
1612  * Initialize sysfs.  This sets up the bonding_masters file in
1613  * /sys/class/net.
1614  */
1615 int bond_create_sysfs(void)
1616 {
1617         int ret;
1618
1619         ret = netdev_class_create_file(&class_attr_bonding_masters);
1620         /*
1621          * Permit multiple loads of the module by ignoring failures to
1622          * create the bonding_masters sysfs file.  Bonding devices
1623          * created by second or subsequent loads of the module will
1624          * not be listed in, or controllable by, bonding_masters, but
1625          * will have the usual "bonding" sysfs directory.
1626          *
1627          * This is done to preserve backwards compatibility for
1628          * initscripts/sysconfig, which load bonding multiple times to
1629          * configure multiple bonding devices.
1630          */
1631         if (ret == -EEXIST) {
1632                 /* Is someone being kinky and naming a device bonding_master? */
1633                 if (__dev_get_by_name(&init_net,
1634                                       class_attr_bonding_masters.attr.name))
1635                         pr_err("network device named %s already exists in sysfs",
1636                                class_attr_bonding_masters.attr.name);
1637                 ret = 0;
1638         }
1639
1640         return ret;
1641
1642 }
1643
1644 /*
1645  * Remove /sys/class/net/bonding_masters.
1646  */
1647 void bond_destroy_sysfs(void)
1648 {
1649         netdev_class_remove_file(&class_attr_bonding_masters);
1650 }
1651
1652 /*
1653  * Initialize sysfs for each bond.  This sets up and registers
1654  * the 'bondctl' directory for each individual bond under /sys/class/net.
1655  */
1656 void bond_prepare_sysfs_group(struct bonding *bond)
1657 {
1658         bond->dev->sysfs_groups[0] = &bonding_group;
1659 }
1660