drivers/net/bonding/bond_sysfs.c

   1 /*
   2  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <linux/sched.h>
  29 #include <linux/fs.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/inetdevice.h>
  34 #include <linux/in.h>
  35 #include <linux/sysfs.h>
  36 #include <linux/ctype.h>
  37 #include <linux/inet.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/etherdevice.h>
  40 #include <net/net_namespace.h>
  41 #include <net/netns/generic.h>
  42 #include <linux/nsproxy.h>
  43
  44 #include "bonding.h"
  45
  46 #define to_dev(obj)     container_of(obj, struct device, kobj)
  47 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  48
  49 /*
  50  * "show" function for the bond_masters attribute.
  51  * The class parameter is ignored.
  52  */
  53 static ssize_t bonding_show_bonds(struct class *cls,
  54                                   struct class_attribute *attr,
  55                                   char *buf)
  56 {
  57         struct bond_net *bn =
  58                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  59         int res = 0;
  60         struct bonding *bond;
  61
  62         rtnl_lock();
  63
  64         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  65                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  66                         /* not enough space for another interface name */
  67                         if ((PAGE_SIZE - res) > 10)
  68                                 res = PAGE_SIZE - 10;
  69                         res += sprintf(buf + res, "++more++ ");
  70                         break;
  71                 }
  72                 res += sprintf(buf + res, "%s ", bond->dev->name);
  73         }
  74         if (res)
  75                 buf[res-1] = '\n'; /* eat the leftover space */
  76
  77         rtnl_unlock();
  78         return res;
  79 }
  80
  81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  82 {
  83         struct bonding *bond;
  84
  85         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  86                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  87                         return bond->dev;
  88         }
  89         return NULL;
  90 }
  91
  92 /*
  93  * "store" function for the bond_masters attribute.  This is what
  94  * creates and deletes entire bonds.
  95  *
  96  * The class parameter is ignored.
  97  *
  98  */
  99
 100 static ssize_t bonding_store_bonds(struct class *cls,
 101                                    struct class_attribute *attr,
 102                                    const char *buffer, size_t count)
 103 {
 104         struct bond_net *bn =
 105                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 106         char command[IFNAMSIZ + 1] = {0, };
 107         char *ifname;
 108         int rv, res = count;
 109
 110         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 111         ifname = command + 1;
 112         if ((strlen(command) <= 1) ||
 113             !dev_valid_name(ifname))
 114                 goto err_no_cmd;
 115
 116         if (command[0] == '+') {
 117                 pr_info("%s is being created...\n", ifname);
 118                 rv = bond_create(bn->net, ifname);
 119                 if (rv) {
 120                         if (rv == -EEXIST)
 121                                 pr_info("%s already exists.\n", ifname);
 122                         else
 123                                 pr_info("%s creation failed.\n", ifname);
 124                         res = rv;
 125                 }
 126         } else if (command[0] == '-') {
 127                 struct net_device *bond_dev;
 128
 129                 rtnl_lock();
 130                 bond_dev = bond_get_by_name(bn, ifname);
 131                 if (bond_dev) {
 132                         pr_info("%s is being deleted...\n", ifname);
 133                         unregister_netdevice(bond_dev);
 134                 } else {
 135                         pr_err("unable to delete non-existent %s\n", ifname);
 136                         res = -ENODEV;
 137                 }
 138                 rtnl_unlock();
 139         } else
 140                 goto err_no_cmd;
 141
 142         /* Always return either count or an error.  If you return 0, you'll
 143          * get called forever, which is bad.
 144          */
 145         return res;
 146
 147 err_no_cmd:
 148         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 149         return -EPERM;
 150 }
 151
 152 static const void *bonding_namespace(struct class *cls,
 153                                      const struct class_attribute *attr)
 154 {
 155         const struct bond_net *bn =
 156                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 157         return bn->net;
 158 }
 159
 160 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 161 static const struct class_attribute class_attr_bonding_masters = {
 162         .attr = {
 163                 .name = "bonding_masters",
 164                 .mode = S_IWUSR | S_IRUGO,
 165         },
 166         .show = bonding_show_bonds,
 167         .store = bonding_store_bonds,
 168         .namespace = bonding_namespace,
 169 };
 170
 171 int bond_create_slave_symlinks(struct net_device *master,
 172                                struct net_device *slave)
 173 {
 174         char linkname[IFNAMSIZ+7];
 175         int ret = 0;
 176
 177         /* first, create a link from the slave back to the master */
 178         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 179                                 "master");
 180         if (ret)
 181                 return ret;
 182         /* next, create a link from the master to the slave */
 183         sprintf(linkname, "slave_%s", slave->name);
 184         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 185                                 linkname);
 186
 187         /* free the master link created earlier in case of error */
 188         if (ret)
 189                 sysfs_remove_link(&(slave->dev.kobj), "master");
 190
 191         return ret;
 192
 193 }
 194
 195 void bond_destroy_slave_symlinks(struct net_device *master,
 196                                  struct net_device *slave)
 197 {
 198         char linkname[IFNAMSIZ+7];
 199
 200         sysfs_remove_link(&(slave->dev.kobj), "master");
 201         sprintf(linkname, "slave_%s", slave->name);
 202         sysfs_remove_link(&(master->dev.kobj), linkname);
 203 }
 204
 205
 206 /*
 207  * Show the slaves in the current bond.
 208  */
 209 static ssize_t bonding_show_slaves(struct device *d,
 210                                    struct device_attribute *attr, char *buf)
 211 {
 212         struct slave *slave;
 213         int i, res = 0;
 214         struct bonding *bond = to_bond(d);
 215
 216         read_lock(&bond->lock);
 217         bond_for_each_slave(bond, slave, i) {
 218                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 219                         /* not enough space for another interface name */
 220                         if ((PAGE_SIZE - res) > 10)
 221                                 res = PAGE_SIZE - 10;
 222                         res += sprintf(buf + res, "++more++ ");
 223                         break;
 224                 }
 225                 res += sprintf(buf + res, "%s ", slave->dev->name);
 226         }
 227         read_unlock(&bond->lock);
 228         if (res)
 229                 buf[res-1] = '\n'; /* eat the leftover space */
 230         return res;
 231 }
 232
 233 /*
 234  * Set the slaves in the current bond.  The bond interface must be
 235  * up for this to succeed.
 236  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 237  * All hard work should be done there.
 238  */
 239 static ssize_t bonding_store_slaves(struct device *d,
 240                                     struct device_attribute *attr,
 241                                     const char *buffer, size_t count)
 242 {
 243         char command[IFNAMSIZ + 1] = { 0, };
 244         char *ifname;
 245         int res, ret = count;
 246         struct net_device *dev;
 247         struct bonding *bond = to_bond(d);
 248
 249         if (!rtnl_trylock())
 250                 return restart_syscall();
 251
 252         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 253         ifname = command + 1;
 254         if ((strlen(command) <= 1) ||
 255             !dev_valid_name(ifname))
 256                 goto err_no_cmd;
 257
 258         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 259         if (!dev) {
 260                 pr_info("%s: Interface %s does not exist!\n",
 261                         bond->dev->name, ifname);
 262                 ret = -ENODEV;
 263                 goto out;
 264         }
 265
 266         switch (command[0]) {
 267         case '+':
 268                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 269                 res = bond_enslave(bond->dev, dev);
 270                 break;
 271
 272         case '-':
 273                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 274                 res = bond_release(bond->dev, dev);
 275                 break;
 276
 277         default:
 278                 goto err_no_cmd;
 279         }
 280
 281         if (res)
 282                 ret = res;
 283         goto out;
 284
 285 err_no_cmd:
 286         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 287                bond->dev->name);
 288         ret = -EPERM;
 289
 290 out:
 291         rtnl_unlock();
 292         return ret;
 293 }
 294
 295 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 296                    bonding_store_slaves);
 297
 298 /*
 299  * Show and set the bonding mode.  The bond interface must be down to
 300  * change the mode.
 301  */
 302 static ssize_t bonding_show_mode(struct device *d,
 303                                  struct device_attribute *attr, char *buf)
 304 {
 305         struct bonding *bond = to_bond(d);
 306
 307         return sprintf(buf, "%s %d\n",
 308                         bond_mode_tbl[bond->params.mode].modename,
 309                         bond->params.mode);
 310 }
 311
 312 static ssize_t bonding_store_mode(struct device *d,
 313                                   struct device_attribute *attr,
 314                                   const char *buf, size_t count)
 315 {
 316         int new_value, ret = count;
 317         struct bonding *bond = to_bond(d);
 318
 319         if (!rtnl_trylock())
 320                 return restart_syscall();
 321
 322         if (bond->dev->flags & IFF_UP) {
 323                 pr_err("unable to update mode of %s because interface is up.\n",
 324                        bond->dev->name);
 325                 ret = -EPERM;
 326                 goto out;
 327         }
 328
 329         if (bond->slave_cnt > 0) {
 330                 pr_err("unable to update mode of %s because it has slaves.\n",
 331                         bond->dev->name);
 332                 ret = -EPERM;
 333                 goto out;
 334         }
 335
 336         new_value = bond_parse_parm(buf, bond_mode_tbl);
 337         if (new_value < 0)  {
 338                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 339                        bond->dev->name, (int)strlen(buf) - 1, buf);
 340                 ret = -EINVAL;
 341                 goto out;
 342         }
 343         if ((new_value == BOND_MODE_ALB ||
 344              new_value == BOND_MODE_TLB) &&
 345             bond->params.arp_interval) {
 346                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 347                        bond->dev->name, bond_mode_tbl[new_value].modename);
 348                 ret = -EINVAL;
 349                 goto out;
 350         }
 351
 352         bond->params.mode = new_value;
 353         bond_set_mode_ops(bond, bond->params.mode);
 354         pr_info("%s: setting mode to %s (%d).\n",
 355                 bond->dev->name, bond_mode_tbl[new_value].modename,
 356                 new_value);
 357 out:
 358         rtnl_unlock();
 359         return ret;
 360 }
 361 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 362                    bonding_show_mode, bonding_store_mode);
 363
 364 /*
 365  * Show and set the bonding transmit hash method.
 366  * The bond interface must be down to change the xmit hash policy.
 367  */
 368 static ssize_t bonding_show_xmit_hash(struct device *d,
 369                                       struct device_attribute *attr,
 370                                       char *buf)
 371 {
 372         struct bonding *bond = to_bond(d);
 373
 374         return sprintf(buf, "%s %d\n",
 375                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 376                        bond->params.xmit_policy);
 377 }
 378
 379 static ssize_t bonding_store_xmit_hash(struct device *d,
 380                                        struct device_attribute *attr,
 381                                        const char *buf, size_t count)
 382 {
 383         int new_value, ret = count;
 384         struct bonding *bond = to_bond(d);
 385
 386         if (bond->dev->flags & IFF_UP) {
 387                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 388                        bond->dev->name);
 389                 ret = -EPERM;
 390                 goto out;
 391         }
 392
 393         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 394         if (new_value < 0)  {
 395                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 396                        bond->dev->name,
 397                        (int)strlen(buf) - 1, buf);
 398                 ret = -EINVAL;
 399                 goto out;
 400         } else {
 401                 bond->params.xmit_policy = new_value;
 402                 bond_set_mode_ops(bond, bond->params.mode);
 403                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 404                         bond->dev->name,
 405                         xmit_hashtype_tbl[new_value].modename, new_value);
 406         }
 407 out:
 408         return ret;
 409 }
 410 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 411                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 412
 413 /*
 414  * Show and set arp_validate.
 415  */
 416 static ssize_t bonding_show_arp_validate(struct device *d,
 417                                          struct device_attribute *attr,
 418                                          char *buf)
 419 {
 420         struct bonding *bond = to_bond(d);
 421
 422         return sprintf(buf, "%s %d\n",
 423                        arp_validate_tbl[bond->params.arp_validate].modename,
 424                        bond->params.arp_validate);
 425 }
 426
 427 static ssize_t bonding_store_arp_validate(struct device *d,
 428                                           struct device_attribute *attr,
 429                                           const char *buf, size_t count)
 430 {
 431         int new_value;
 432         struct bonding *bond = to_bond(d);
 433
 434         new_value = bond_parse_parm(buf, arp_validate_tbl);
 435         if (new_value < 0) {
 436                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 437                        bond->dev->name, buf);
 438                 return -EINVAL;
 439         }
 440         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 441                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 442                        bond->dev->name);
 443                 return -EINVAL;
 444         }
 445         pr_info("%s: setting arp_validate to %s (%d).\n",
 446                 bond->dev->name, arp_validate_tbl[new_value].modename,
 447                 new_value);
 448
 449         bond->params.arp_validate = new_value;
 450
 451         return count;
 452 }
 453
 454 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 455                    bonding_store_arp_validate);
 456
 457 /*
 458  * Show and store fail_over_mac.  User only allowed to change the
 459  * value when there are no slaves.
 460  */
 461 static ssize_t bonding_show_fail_over_mac(struct device *d,
 462                                           struct device_attribute *attr,
 463                                           char *buf)
 464 {
 465         struct bonding *bond = to_bond(d);
 466
 467         return sprintf(buf, "%s %d\n",
 468                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 469                        bond->params.fail_over_mac);
 470 }
 471
 472 static ssize_t bonding_store_fail_over_mac(struct device *d,
 473                                            struct device_attribute *attr,
 474                                            const char *buf, size_t count)
 475 {
 476         int new_value;
 477         struct bonding *bond = to_bond(d);
 478
 479         if (bond->slave_cnt != 0) {
 480                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 481                        bond->dev->name);
 482                 return -EPERM;
 483         }
 484
 485         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 486         if (new_value < 0) {
 487                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 488                        bond->dev->name, buf);
 489                 return -EINVAL;
 490         }
 491
 492         bond->params.fail_over_mac = new_value;
 493         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 494                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 495                 new_value);
 496
 497         return count;
 498 }
 499
 500 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 501                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 502
 503 /*
 504  * Show and set the arp timer interval.  There are two tricky bits
 505  * here.  First, if ARP monitoring is activated, then we must disable
 506  * MII monitoring.  Second, if the ARP timer isn't running, we must
 507  * start it.
 508  */
 509 static ssize_t bonding_show_arp_interval(struct device *d,
 510                                          struct device_attribute *attr,
 511                                          char *buf)
 512 {
 513         struct bonding *bond = to_bond(d);
 514
 515         return sprintf(buf, "%d\n", bond->params.arp_interval);
 516 }
 517
 518 static ssize_t bonding_store_arp_interval(struct device *d,
 519                                           struct device_attribute *attr,
 520                                           const char *buf, size_t count)
 521 {
 522         int new_value, ret = count;
 523         struct bonding *bond = to_bond(d);
 524
 525         if (!rtnl_trylock())
 526                 return restart_syscall();
 527         if (sscanf(buf, "%d", &new_value) != 1) {
 528                 pr_err("%s: no arp_interval value specified.\n",
 529                        bond->dev->name);
 530                 ret = -EINVAL;
 531                 goto out;
 532         }
 533         if (new_value < 0) {
 534                 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
 535                        bond->dev->name, new_value, INT_MAX);
 536                 ret = -EINVAL;
 537                 goto out;
 538         }
 539         if (bond->params.mode == BOND_MODE_ALB ||
 540             bond->params.mode == BOND_MODE_TLB ||
 541             bond->params.mode == BOND_MODE_8023AD) {
 542                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n",
 543                         bond->dev->name, bond->dev->name);
 544                 ret = -EINVAL;
 545                 goto out;
 546         }
 547         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 548                 bond->dev->name, new_value);
 549         bond->params.arp_interval = new_value;
 550         if (new_value) {
 551                 if (bond->params.miimon) {
 552                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 553                                 bond->dev->name, bond->dev->name);
 554                         bond->params.miimon = 0;
 555                 }
 556                 if (!bond->params.arp_targets[0])
 557                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 558                                 bond->dev->name);
 559         }
 560         if (bond->dev->flags & IFF_UP) {
 561                 /* If the interface is up, we may need to fire off
 562                  * the ARP timer.  If the interface is down, the
 563                  * timer will get fired off when the open function
 564                  * is called.
 565                  */
 566                 if (!new_value) {
 567                         cancel_delayed_work_sync(&bond->arp_work);
 568                 } else {
 569                         cancel_delayed_work_sync(&bond->mii_work);
 570                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 571                 }
 572         }
 573 out:
 574         rtnl_unlock();
 575         return ret;
 576 }
 577 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 578                    bonding_show_arp_interval, bonding_store_arp_interval);
 579
 580 /*
 581  * Show and set the arp targets.
 582  */
 583 static ssize_t bonding_show_arp_targets(struct device *d,
 584                                         struct device_attribute *attr,
 585                                         char *buf)
 586 {
 587         int i, res = 0;
 588         struct bonding *bond = to_bond(d);
 589
 590         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 591                 if (bond->params.arp_targets[i])
 592                         res += sprintf(buf + res, "%pI4 ",
 593                                        &bond->params.arp_targets[i]);
 594         }
 595         if (res)
 596                 buf[res-1] = '\n'; /* eat the leftover space */
 597         return res;
 598 }
 599
 600 static ssize_t bonding_store_arp_targets(struct device *d,
 601                                          struct device_attribute *attr,
 602                                          const char *buf, size_t count)
 603 {
 604         __be32 newtarget;
 605         int i = 0, done = 0, ret = count;
 606         struct bonding *bond = to_bond(d);
 607         __be32 *targets;
 608
 609         targets = bond->params.arp_targets;
 610         newtarget = in_aton(buf + 1);
 611         /* look for adds */
 612         if (buf[0] == '+') {
 613                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 614                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 615                                bond->dev->name, &newtarget);
 616                         ret = -EINVAL;
 617                         goto out;
 618                 }
 619                 /* look for an empty slot to put the target in, and check for dupes */
 620                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 621                         if (targets[i] == newtarget) { /* duplicate */
 622                                 pr_err("%s: ARP target %pI4 is already present\n",
 623                                        bond->dev->name, &newtarget);
 624                                 ret = -EINVAL;
 625                                 goto out;
 626                         }
 627                         if (targets[i] == 0) {
 628                                 pr_info("%s: adding ARP target %pI4.\n",
 629                                         bond->dev->name, &newtarget);
 630                                 done = 1;
 631                                 targets[i] = newtarget;
 632                         }
 633                 }
 634                 if (!done) {
 635                         pr_err("%s: ARP target table is full!\n",
 636                                bond->dev->name);
 637                         ret = -EINVAL;
 638                         goto out;
 639                 }
 640
 641         } else if (buf[0] == '-')       {
 642                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 643                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 644                                bond->dev->name, &newtarget);
 645                         ret = -EINVAL;
 646                         goto out;
 647                 }
 648
 649                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 650                         if (targets[i] == newtarget) {
 651                                 int j;
 652                                 pr_info("%s: removing ARP target %pI4.\n",
 653                                         bond->dev->name, &newtarget);
 654                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 655                                         targets[j] = targets[j+1];
 656
 657                                 targets[j] = 0;
 658                                 done = 1;
 659                         }
 660                 }
 661                 if (!done) {
 662                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 663                                 bond->dev->name, &newtarget);
 664                         ret = -EINVAL;
 665                         goto out;
 666                 }
 667         } else {
 668                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 669                        bond->dev->name);
 670                 ret = -EPERM;
 671                 goto out;
 672         }
 673
 674 out:
 675         return ret;
 676 }
 677 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 678
 679 /*
 680  * Show and set the up and down delays.  These must be multiples of the
 681  * MII monitoring value, and are stored internally as the multiplier.
 682  * Thus, we must translate to MS for the real world.
 683  */
 684 static ssize_t bonding_show_downdelay(struct device *d,
 685                                       struct device_attribute *attr,
 686                                       char *buf)
 687 {
 688         struct bonding *bond = to_bond(d);
 689
 690         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 691 }
 692
 693 static ssize_t bonding_store_downdelay(struct device *d,
 694                                        struct device_attribute *attr,
 695                                        const char *buf, size_t count)
 696 {
 697         int new_value, ret = count;
 698         struct bonding *bond = to_bond(d);
 699
 700         if (!(bond->params.miimon)) {
 701                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 702                        bond->dev->name);
 703                 ret = -EPERM;
 704                 goto out;
 705         }
 706
 707         if (sscanf(buf, "%d", &new_value) != 1) {
 708                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 709                 ret = -EINVAL;
 710                 goto out;
 711         }
 712         if (new_value < 0) {
 713                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 714                        bond->dev->name, new_value, 0, INT_MAX);
 715                 ret = -EINVAL;
 716                 goto out;
 717         } else {
 718                 if ((new_value % bond->params.miimon) != 0) {
 719                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 720                                    bond->dev->name, new_value,
 721                                    bond->params.miimon,
 722                                    (new_value / bond->params.miimon) *
 723                                    bond->params.miimon);
 724                 }
 725                 bond->params.downdelay = new_value / bond->params.miimon;
 726                 pr_info("%s: Setting down delay to %d.\n",
 727                         bond->dev->name,
 728                         bond->params.downdelay * bond->params.miimon);
 729
 730         }
 731
 732 out:
 733         return ret;
 734 }
 735 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 736                    bonding_show_downdelay, bonding_store_downdelay);
 737
 738 static ssize_t bonding_show_updelay(struct device *d,
 739                                     struct device_attribute *attr,
 740                                     char *buf)
 741 {
 742         struct bonding *bond = to_bond(d);
 743
 744         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 745
 746 }
 747
 748 static ssize_t bonding_store_updelay(struct device *d,
 749                                      struct device_attribute *attr,
 750                                      const char *buf, size_t count)
 751 {
 752         int new_value, ret = count;
 753         struct bonding *bond = to_bond(d);
 754
 755         if (!(bond->params.miimon)) {
 756                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 757                        bond->dev->name);
 758                 ret = -EPERM;
 759                 goto out;
 760         }
 761
 762         if (sscanf(buf, "%d", &new_value) != 1) {
 763                 pr_err("%s: no up delay value specified.\n",
 764                        bond->dev->name);
 765                 ret = -EINVAL;
 766                 goto out;
 767         }
 768         if (new_value < 0) {
 769                 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
 770                        bond->dev->name, new_value, 0, INT_MAX);
 771                 ret = -EINVAL;
 772                 goto out;
 773         } else {
 774                 if ((new_value % bond->params.miimon) != 0) {
 775                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 776                                    bond->dev->name, new_value,
 777                                    bond->params.miimon,
 778                                    (new_value / bond->params.miimon) *
 779                                    bond->params.miimon);
 780                 }
 781                 bond->params.updelay = new_value / bond->params.miimon;
 782                 pr_info("%s: Setting up delay to %d.\n",
 783                         bond->dev->name,
 784                         bond->params.updelay * bond->params.miimon);
 785         }
 786
 787 out:
 788         return ret;
 789 }
 790 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 791                    bonding_show_updelay, bonding_store_updelay);
 792
 793 /*
 794  * Show and set the LACP interval.  Interface must be down, and the mode
 795  * must be set to 802.3ad mode.
 796  */
 797 static ssize_t bonding_show_lacp(struct device *d,
 798                                  struct device_attribute *attr,
 799                                  char *buf)
 800 {
 801         struct bonding *bond = to_bond(d);
 802
 803         return sprintf(buf, "%s %d\n",
 804                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 805                 bond->params.lacp_fast);
 806 }
 807
 808 static ssize_t bonding_store_lacp(struct device *d,
 809                                   struct device_attribute *attr,
 810                                   const char *buf, size_t count)
 811 {
 812         int new_value, ret = count;
 813         struct bonding *bond = to_bond(d);
 814
 815         if (bond->dev->flags & IFF_UP) {
 816                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 817                        bond->dev->name);
 818                 ret = -EPERM;
 819                 goto out;
 820         }
 821
 822         if (bond->params.mode != BOND_MODE_8023AD) {
 823                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 824                        bond->dev->name);
 825                 ret = -EPERM;
 826                 goto out;
 827         }
 828
 829         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 830
 831         if ((new_value == 1) || (new_value == 0)) {
 832                 bond->params.lacp_fast = new_value;
 833                 bond_3ad_update_lacp_rate(bond);
 834                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 835                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 836                         new_value);
 837         } else {
 838                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 839                        bond->dev->name, (int)strlen(buf) - 1, buf);
 840                 ret = -EINVAL;
 841         }
 842 out:
 843         return ret;
 844 }
 845 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 846                    bonding_show_lacp, bonding_store_lacp);
 847
 848 static ssize_t bonding_show_min_links(struct device *d,
 849                                       struct device_attribute *attr,
 850                                       char *buf)
 851 {
 852         struct bonding *bond = to_bond(d);
 853
 854         return sprintf(buf, "%d\n", bond->params.min_links);
 855 }
 856
 857 static ssize_t bonding_store_min_links(struct device *d,
 858                                        struct device_attribute *attr,
 859                                        const char *buf, size_t count)
 860 {
 861         struct bonding *bond = to_bond(d);
 862         int ret;
 863         unsigned int new_value;
 864
 865         ret = kstrtouint(buf, 0, &new_value);
 866         if (ret < 0) {
 867                 pr_err("%s: Ignoring invalid min links value %s.\n",
 868                        bond->dev->name, buf);
 869                 return ret;
 870         }
 871
 872         pr_info("%s: Setting min links value to %u\n",
 873                 bond->dev->name, new_value);
 874         bond->params.min_links = new_value;
 875         return count;
 876 }
 877 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 878                    bonding_show_min_links, bonding_store_min_links);
 879
 880 static ssize_t bonding_show_ad_select(struct device *d,
 881                                       struct device_attribute *attr,
 882                                       char *buf)
 883 {
 884         struct bonding *bond = to_bond(d);
 885
 886         return sprintf(buf, "%s %d\n",
 887                 ad_select_tbl[bond->params.ad_select].modename,
 888                 bond->params.ad_select);
 889 }
 890
 891
 892 static ssize_t bonding_store_ad_select(struct device *d,
 893                                        struct device_attribute *attr,
 894                                        const char *buf, size_t count)
 895 {
 896         int new_value, ret = count;
 897         struct bonding *bond = to_bond(d);
 898
 899         if (bond->dev->flags & IFF_UP) {
 900                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 901                        bond->dev->name);
 902                 ret = -EPERM;
 903                 goto out;
 904         }
 905
 906         new_value = bond_parse_parm(buf, ad_select_tbl);
 907
 908         if (new_value != -1) {
 909                 bond->params.ad_select = new_value;
 910                 pr_info("%s: Setting ad_select to %s (%d).\n",
 911                         bond->dev->name, ad_select_tbl[new_value].modename,
 912                         new_value);
 913         } else {
 914                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 915                        bond->dev->name, (int)strlen(buf) - 1, buf);
 916                 ret = -EINVAL;
 917         }
 918 out:
 919         return ret;
 920 }
 921 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 922                    bonding_show_ad_select, bonding_store_ad_select);
 923
 924 /*
 925  * Show and set the number of peer notifications to send after a failover event.
 926  */
 927 static ssize_t bonding_show_num_peer_notif(struct device *d,
 928                                            struct device_attribute *attr,
 929                                            char *buf)
 930 {
 931         struct bonding *bond = to_bond(d);
 932         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 933 }
 934
 935 static ssize_t bonding_store_num_peer_notif(struct device *d,
 936                                             struct device_attribute *attr,
 937                                             const char *buf, size_t count)
 938 {
 939         struct bonding *bond = to_bond(d);
 940         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 941         return err ? err : count;
 942 }
 943 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 944                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 945 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 946                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 947
 948 /*
 949  * Show and set the MII monitor interval.  There are two tricky bits
 950  * here.  First, if MII monitoring is activated, then we must disable
 951  * ARP monitoring.  Second, if the timer isn't running, we must
 952  * start it.
 953  */
 954 static ssize_t bonding_show_miimon(struct device *d,
 955                                    struct device_attribute *attr,
 956                                    char *buf)
 957 {
 958         struct bonding *bond = to_bond(d);
 959
 960         return sprintf(buf, "%d\n", bond->params.miimon);
 961 }
 962
 963 static ssize_t bonding_store_miimon(struct device *d,
 964                                     struct device_attribute *attr,
 965                                     const char *buf, size_t count)
 966 {
 967         int new_value, ret = count;
 968         struct bonding *bond = to_bond(d);
 969
 970         if (!rtnl_trylock())
 971                 return restart_syscall();
 972         if (sscanf(buf, "%d", &new_value) != 1) {
 973                 pr_err("%s: no miimon value specified.\n",
 974                        bond->dev->name);
 975                 ret = -EINVAL;
 976                 goto out;
 977         }
 978         if (new_value < 0) {
 979                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 980                        bond->dev->name, new_value, 0, INT_MAX);
 981                 ret = -EINVAL;
 982                 goto out;
 983         }
 984         pr_info("%s: Setting MII monitoring interval to %d.\n",
 985                 bond->dev->name, new_value);
 986         bond->params.miimon = new_value;
 987         if (bond->params.updelay)
 988                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 989                         bond->dev->name,
 990                         bond->params.updelay * bond->params.miimon);
 991         if (bond->params.downdelay)
 992                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 993                         bond->dev->name,
 994                         bond->params.downdelay * bond->params.miimon);
 995         if (new_value && bond->params.arp_interval) {
 996                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 997                         bond->dev->name);
 998                 bond->params.arp_interval = 0;
 999                 if (bond->params.arp_validate)
1000                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1001         }
1002         if (bond->dev->flags & IFF_UP) {
1003                 /* If the interface is up, we may need to fire off
1004                  * the MII timer. If the interface is down, the
1005                  * timer will get fired off when the open function
1006                  * is called.
1007                  */
1008                 if (!new_value) {
1009                         cancel_delayed_work_sync(&bond->mii_work);
1010                 } else {
1011                         cancel_delayed_work_sync(&bond->arp_work);
1012                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1013                 }
1014         }
1015 out:
1016         rtnl_unlock();
1017         return ret;
1018 }
1019 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1020                    bonding_show_miimon, bonding_store_miimon);
1021
1022 /*
1023  * Show and set the primary slave.  The store function is much
1024  * simpler than bonding_store_slaves function because it only needs to
1025  * handle one interface name.
1026  * The bond must be a mode that supports a primary for this be
1027  * set.
1028  */
1029 static ssize_t bonding_show_primary(struct device *d,
1030                                     struct device_attribute *attr,
1031                                     char *buf)
1032 {
1033         int count = 0;
1034         struct bonding *bond = to_bond(d);
1035
1036         if (bond->primary_slave)
1037                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1038
1039         return count;
1040 }
1041
1042 static ssize_t bonding_store_primary(struct device *d,
1043                                      struct device_attribute *attr,
1044                                      const char *buf, size_t count)
1045 {
1046         int i;
1047         struct slave *slave;
1048         struct bonding *bond = to_bond(d);
1049         char ifname[IFNAMSIZ];
1050
1051         if (!rtnl_trylock())
1052                 return restart_syscall();
1053         block_netpoll_tx();
1054         read_lock(&bond->lock);
1055         write_lock_bh(&bond->curr_slave_lock);
1056
1057         if (!USES_PRIMARY(bond->params.mode)) {
1058                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1059                         bond->dev->name, bond->dev->name, bond->params.mode);
1060                 goto out;
1061         }
1062
1063         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1064
1065         /* check to see if we are clearing primary */
1066         if (!strlen(ifname) || buf[0] == '\n') {
1067                 pr_info("%s: Setting primary slave to None.\n",
1068                         bond->dev->name);
1069                 bond->primary_slave = NULL;
1070                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1071                 bond_select_active_slave(bond);
1072                 goto out;
1073         }
1074
1075         bond_for_each_slave(bond, slave, i) {
1076                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1077                         pr_info("%s: Setting %s as primary slave.\n",
1078                                 bond->dev->name, slave->dev->name);
1079                         bond->primary_slave = slave;
1080                         strcpy(bond->params.primary, slave->dev->name);
1081                         bond_select_active_slave(bond);
1082                         goto out;
1083                 }
1084         }
1085
1086         strncpy(bond->params.primary, ifname, IFNAMSIZ);
1087         bond->params.primary[IFNAMSIZ - 1] = 0;
1088
1089         pr_info("%s: Recording %s as primary, "
1090                 "but it has not been enslaved to %s yet.\n",
1091                 bond->dev->name, ifname, bond->dev->name);
1092 out:
1093         write_unlock_bh(&bond->curr_slave_lock);
1094         read_unlock(&bond->lock);
1095         unblock_netpoll_tx();
1096         rtnl_unlock();
1097
1098         return count;
1099 }
1100 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1101                    bonding_show_primary, bonding_store_primary);
1102
1103 /*
1104  * Show and set the primary_reselect flag.
1105  */
1106 static ssize_t bonding_show_primary_reselect(struct device *d,
1107                                              struct device_attribute *attr,
1108                                              char *buf)
1109 {
1110         struct bonding *bond = to_bond(d);
1111
1112         return sprintf(buf, "%s %d\n",
1113                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1114                        bond->params.primary_reselect);
1115 }
1116
1117 static ssize_t bonding_store_primary_reselect(struct device *d,
1118                                               struct device_attribute *attr,
1119                                               const char *buf, size_t count)
1120 {
1121         int new_value, ret = count;
1122         struct bonding *bond = to_bond(d);
1123
1124         if (!rtnl_trylock())
1125                 return restart_syscall();
1126
1127         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1128         if (new_value < 0)  {
1129                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1130                        bond->dev->name,
1131                        (int) strlen(buf) - 1, buf);
1132                 ret = -EINVAL;
1133                 goto out;
1134         }
1135
1136         bond->params.primary_reselect = new_value;
1137         pr_info("%s: setting primary_reselect to %s (%d).\n",
1138                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1139                 new_value);
1140
1141         block_netpoll_tx();
1142         read_lock(&bond->lock);
1143         write_lock_bh(&bond->curr_slave_lock);
1144         bond_select_active_slave(bond);
1145         write_unlock_bh(&bond->curr_slave_lock);
1146         read_unlock(&bond->lock);
1147         unblock_netpoll_tx();
1148 out:
1149         rtnl_unlock();
1150         return ret;
1151 }
1152 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1153                    bonding_show_primary_reselect,
1154                    bonding_store_primary_reselect);
1155
1156 /*
1157  * Show and set the use_carrier flag.
1158  */
1159 static ssize_t bonding_show_carrier(struct device *d,
1160                                     struct device_attribute *attr,
1161                                     char *buf)
1162 {
1163         struct bonding *bond = to_bond(d);
1164
1165         return sprintf(buf, "%d\n", bond->params.use_carrier);
1166 }
1167
1168 static ssize_t bonding_store_carrier(struct device *d,
1169                                      struct device_attribute *attr,
1170                                      const char *buf, size_t count)
1171 {
1172         int new_value, ret = count;
1173         struct bonding *bond = to_bond(d);
1174
1175
1176         if (sscanf(buf, "%d", &new_value) != 1) {
1177                 pr_err("%s: no use_carrier value specified.\n",
1178                        bond->dev->name);
1179                 ret = -EINVAL;
1180                 goto out;
1181         }
1182         if ((new_value == 0) || (new_value == 1)) {
1183                 bond->params.use_carrier = new_value;
1184                 pr_info("%s: Setting use_carrier to %d.\n",
1185                         bond->dev->name, new_value);
1186         } else {
1187                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1188                         bond->dev->name, new_value);
1189         }
1190 out:
1191         return ret;
1192 }
1193 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1194                    bonding_show_carrier, bonding_store_carrier);
1195
1196
1197 /*
1198  * Show and set currently active_slave.
1199  */
1200 static ssize_t bonding_show_active_slave(struct device *d,
1201                                          struct device_attribute *attr,
1202                                          char *buf)
1203 {
1204         struct slave *curr;
1205         struct bonding *bond = to_bond(d);
1206         int count = 0;
1207
1208         read_lock(&bond->curr_slave_lock);
1209         curr = bond->curr_active_slave;
1210         read_unlock(&bond->curr_slave_lock);
1211
1212         if (USES_PRIMARY(bond->params.mode) && curr)
1213                 count = sprintf(buf, "%s\n", curr->dev->name);
1214         return count;
1215 }
1216
1217 static ssize_t bonding_store_active_slave(struct device *d,
1218                                           struct device_attribute *attr,
1219                                           const char *buf, size_t count)
1220 {
1221         int i;
1222         struct slave *slave;
1223         struct slave *old_active = NULL;
1224         struct slave *new_active = NULL;
1225         struct bonding *bond = to_bond(d);
1226         char ifname[IFNAMSIZ];
1227
1228         if (!rtnl_trylock())
1229                 return restart_syscall();
1230
1231         block_netpoll_tx();
1232         read_lock(&bond->lock);
1233         write_lock_bh(&bond->curr_slave_lock);
1234
1235         if (!USES_PRIMARY(bond->params.mode)) {
1236                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1237                         bond->dev->name, bond->dev->name, bond->params.mode);
1238                 goto out;
1239         }
1240
1241         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1242
1243         /* check to see if we are clearing active */
1244         if (!strlen(ifname) || buf[0] == '\n') {
1245                 pr_info("%s: Clearing current active slave.\n",
1246                         bond->dev->name);
1247                 bond->curr_active_slave = NULL;
1248                 bond_select_active_slave(bond);
1249                 goto out;
1250         }
1251
1252         bond_for_each_slave(bond, slave, i) {
1253                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1254                         old_active = bond->curr_active_slave;
1255                         new_active = slave;
1256                         if (new_active == old_active) {
1257                                 /* do nothing */
1258                                 pr_info("%s: %s is already the current"
1259                                         " active slave.\n",
1260                                         bond->dev->name,
1261                                         slave->dev->name);
1262                                 goto out;
1263                         }
1264                         else {
1265                                 if ((new_active) &&
1266                                     (old_active) &&
1267                                     (new_active->link == BOND_LINK_UP) &&
1268                                     IS_UP(new_active->dev)) {
1269                                         pr_info("%s: Setting %s as active"
1270                                                 " slave.\n",
1271                                                 bond->dev->name,
1272                                                 slave->dev->name);
1273                                         bond_change_active_slave(bond,
1274                                                                  new_active);
1275                                 }
1276                                 else {
1277                                         pr_info("%s: Could not set %s as"
1278                                                 " active slave; either %s is"
1279                                                 " down or the link is down.\n",
1280                                                 bond->dev->name,
1281                                                 slave->dev->name,
1282                                                 slave->dev->name);
1283                                 }
1284                                 goto out;
1285                         }
1286                 }
1287         }
1288
1289         pr_info("%s: Unable to set %.*s as active slave.\n",
1290                 bond->dev->name, (int)strlen(buf) - 1, buf);
1291  out:
1292         write_unlock_bh(&bond->curr_slave_lock);
1293         read_unlock(&bond->lock);
1294         unblock_netpoll_tx();
1295
1296         rtnl_unlock();
1297
1298         return count;
1299
1300 }
1301 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1302                    bonding_show_active_slave, bonding_store_active_slave);
1303
1304
1305 /*
1306  * Show link status of the bond interface.
1307  */
1308 static ssize_t bonding_show_mii_status(struct device *d,
1309                                        struct device_attribute *attr,
1310                                        char *buf)
1311 {
1312         struct slave *curr;
1313         struct bonding *bond = to_bond(d);
1314
1315         read_lock(&bond->curr_slave_lock);
1316         curr = bond->curr_active_slave;
1317         read_unlock(&bond->curr_slave_lock);
1318
1319         return sprintf(buf, "%s\n", curr ? "up" : "down");
1320 }
1321 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1322
1323 /*
1324  * Show current 802.3ad aggregator ID.
1325  */
1326 static ssize_t bonding_show_ad_aggregator(struct device *d,
1327                                           struct device_attribute *attr,
1328                                           char *buf)
1329 {
1330         int count = 0;
1331         struct bonding *bond = to_bond(d);
1332
1333         if (bond->params.mode == BOND_MODE_8023AD) {
1334                 struct ad_info ad_info;
1335                 count = sprintf(buf, "%d\n",
1336                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1337                                 ?  0 : ad_info.aggregator_id);
1338         }
1339
1340         return count;
1341 }
1342 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1343
1344
1345 /*
1346  * Show number of active 802.3ad ports.
1347  */
1348 static ssize_t bonding_show_ad_num_ports(struct device *d,
1349                                          struct device_attribute *attr,
1350                                          char *buf)
1351 {
1352         int count = 0;
1353         struct bonding *bond = to_bond(d);
1354
1355         if (bond->params.mode == BOND_MODE_8023AD) {
1356                 struct ad_info ad_info;
1357                 count = sprintf(buf, "%d\n",
1358                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1359                                 ?  0 : ad_info.ports);
1360         }
1361
1362         return count;
1363 }
1364 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1365
1366
1367 /*
1368  * Show current 802.3ad actor key.
1369  */
1370 static ssize_t bonding_show_ad_actor_key(struct device *d,
1371                                          struct device_attribute *attr,
1372                                          char *buf)
1373 {
1374         int count = 0;
1375         struct bonding *bond = to_bond(d);
1376
1377         if (bond->params.mode == BOND_MODE_8023AD) {
1378                 struct ad_info ad_info;
1379                 count = sprintf(buf, "%d\n",
1380                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1381                                 ?  0 : ad_info.actor_key);
1382         }
1383
1384         return count;
1385 }
1386 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1387
1388
1389 /*
1390  * Show current 802.3ad partner key.
1391  */
1392 static ssize_t bonding_show_ad_partner_key(struct device *d,
1393                                            struct device_attribute *attr,
1394                                            char *buf)
1395 {
1396         int count = 0;
1397         struct bonding *bond = to_bond(d);
1398
1399         if (bond->params.mode == BOND_MODE_8023AD) {
1400                 struct ad_info ad_info;
1401                 count = sprintf(buf, "%d\n",
1402                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1403                                 ?  0 : ad_info.partner_key);
1404         }
1405
1406         return count;
1407 }
1408 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1409
1410
1411 /*
1412  * Show current 802.3ad partner mac.
1413  */
1414 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1415                                            struct device_attribute *attr,
1416                                            char *buf)
1417 {
1418         int count = 0;
1419         struct bonding *bond = to_bond(d);
1420
1421         if (bond->params.mode == BOND_MODE_8023AD) {
1422                 struct ad_info ad_info;
1423                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1424                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1425         }
1426
1427         return count;
1428 }
1429 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1430
1431 /*
1432  * Show the queue_ids of the slaves in the current bond.
1433  */
1434 static ssize_t bonding_show_queue_id(struct device *d,
1435                                      struct device_attribute *attr,
1436                                      char *buf)
1437 {
1438         struct slave *slave;
1439         int i, res = 0;
1440         struct bonding *bond = to_bond(d);
1441
1442         if (!rtnl_trylock())
1443                 return restart_syscall();
1444
1445         read_lock(&bond->lock);
1446         bond_for_each_slave(bond, slave, i) {
1447                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1448                         /* not enough space for another interface_name:queue_id pair */
1449                         if ((PAGE_SIZE - res) > 10)
1450                                 res = PAGE_SIZE - 10;
1451                         res += sprintf(buf + res, "++more++ ");
1452                         break;
1453                 }
1454                 res += sprintf(buf + res, "%s:%d ",
1455                                slave->dev->name, slave->queue_id);
1456         }
1457         read_unlock(&bond->lock);
1458         if (res)
1459                 buf[res-1] = '\n'; /* eat the leftover space */
1460         rtnl_unlock();
1461         return res;
1462 }
1463
1464 /*
1465  * Set the queue_ids of the  slaves in the current bond.  The bond
1466  * interface must be enslaved for this to work.
1467  */
1468 static ssize_t bonding_store_queue_id(struct device *d,
1469                                       struct device_attribute *attr,
1470                                       const char *buffer, size_t count)
1471 {
1472         struct slave *slave, *update_slave;
1473         struct bonding *bond = to_bond(d);
1474         u16 qid;
1475         int i, ret = count;
1476         char *delim;
1477         struct net_device *sdev = NULL;
1478
1479         if (!rtnl_trylock())
1480                 return restart_syscall();
1481
1482         /* delim will point to queue id if successful */
1483         delim = strchr(buffer, ':');
1484         if (!delim)
1485                 goto err_no_cmd;
1486
1487         /*
1488          * Terminate string that points to device name and bump it
1489          * up one, so we can read the queue id there.
1490          */
1491         *delim = '\0';
1492         if (sscanf(++delim, "%hd\n", &qid) != 1)
1493                 goto err_no_cmd;
1494
1495         /* Check buffer length, valid ifname and queue id */
1496         if (strlen(buffer) > IFNAMSIZ ||
1497             !dev_valid_name(buffer) ||
1498             qid > bond->dev->real_num_tx_queues)
1499                 goto err_no_cmd;
1500
1501         /* Get the pointer to that interface if it exists */
1502         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1503         if (!sdev)
1504                 goto err_no_cmd;
1505
1506         read_lock(&bond->lock);
1507
1508         /* Search for thes slave and check for duplicate qids */
1509         update_slave = NULL;
1510         bond_for_each_slave(bond, slave, i) {
1511                 if (sdev == slave->dev)
1512                         /*
1513                          * We don't need to check the matching
1514                          * slave for dups, since we're overwriting it
1515                          */
1516                         update_slave = slave;
1517                 else if (qid && qid == slave->queue_id) {
1518                         goto err_no_cmd_unlock;
1519                 }
1520         }
1521
1522         if (!update_slave)
1523                 goto err_no_cmd_unlock;
1524
1525         /* Actually set the qids for the slave */
1526         update_slave->queue_id = qid;
1527
1528         read_unlock(&bond->lock);
1529 out:
1530         rtnl_unlock();
1531         return ret;
1532
1533 err_no_cmd_unlock:
1534         read_unlock(&bond->lock);
1535 err_no_cmd:
1536         pr_info("invalid input for queue_id set for %s.\n",
1537                 bond->dev->name);
1538         ret = -EPERM;
1539         goto out;
1540 }
1541
1542 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1543                    bonding_store_queue_id);
1544
1545
1546 /*
1547  * Show and set the all_slaves_active flag.
1548  */
1549 static ssize_t bonding_show_slaves_active(struct device *d,
1550                                           struct device_attribute *attr,
1551                                           char *buf)
1552 {
1553         struct bonding *bond = to_bond(d);
1554
1555         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1556 }
1557
1558 static ssize_t bonding_store_slaves_active(struct device *d,
1559                                            struct device_attribute *attr,
1560                                            const char *buf, size_t count)
1561 {
1562         int i, new_value, ret = count;
1563         struct bonding *bond = to_bond(d);
1564         struct slave *slave;
1565
1566         if (sscanf(buf, "%d", &new_value) != 1) {
1567                 pr_err("%s: no all_slaves_active value specified.\n",
1568                        bond->dev->name);
1569                 ret = -EINVAL;
1570                 goto out;
1571         }
1572
1573         if (new_value == bond->params.all_slaves_active)
1574                 goto out;
1575
1576         if ((new_value == 0) || (new_value == 1)) {
1577                 bond->params.all_slaves_active = new_value;
1578         } else {
1579                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1580                         bond->dev->name, new_value);
1581                 ret = -EINVAL;
1582                 goto out;
1583         }
1584
1585         read_lock(&bond->lock);
1586         bond_for_each_slave(bond, slave, i) {
1587                 if (!bond_is_active_slave(slave)) {
1588                         if (new_value)
1589                                 slave->inactive = 0;
1590                         else
1591                                 slave->inactive = 1;
1592                 }
1593         }
1594         read_unlock(&bond->lock);
1595 out:
1596         return ret;
1597 }
1598 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1599                    bonding_show_slaves_active, bonding_store_slaves_active);
1600
1601 /*
1602  * Show and set the number of IGMP membership reports to send on link failure
1603  */
1604 static ssize_t bonding_show_resend_igmp(struct device *d,
1605                                         struct device_attribute *attr,
1606                                         char *buf)
1607 {
1608         struct bonding *bond = to_bond(d);
1609
1610         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1611 }
1612
1613 static ssize_t bonding_store_resend_igmp(struct device *d,
1614                                          struct device_attribute *attr,
1615                                          const char *buf, size_t count)
1616 {
1617         int new_value, ret = count;
1618         struct bonding *bond = to_bond(d);
1619
1620         if (sscanf(buf, "%d", &new_value) != 1) {
1621                 pr_err("%s: no resend_igmp value specified.\n",
1622                        bond->dev->name);
1623                 ret = -EINVAL;
1624                 goto out;
1625         }
1626
1627         if (new_value < 0 || new_value > 255) {
1628                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1629                        bond->dev->name, new_value);
1630                 ret = -EINVAL;
1631                 goto out;
1632         }
1633
1634         pr_info("%s: Setting resend_igmp to %d.\n",
1635                 bond->dev->name, new_value);
1636         bond->params.resend_igmp = new_value;
1637 out:
1638         return ret;
1639 }
1640
1641 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1642                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1643
1644 static struct attribute *per_bond_attrs[] = {
1645         &dev_attr_slaves.attr,
1646         &dev_attr_mode.attr,
1647         &dev_attr_fail_over_mac.attr,
1648         &dev_attr_arp_validate.attr,
1649         &dev_attr_arp_interval.attr,
1650         &dev_attr_arp_ip_target.attr,
1651         &dev_attr_downdelay.attr,
1652         &dev_attr_updelay.attr,
1653         &dev_attr_lacp_rate.attr,
1654         &dev_attr_ad_select.attr,
1655         &dev_attr_xmit_hash_policy.attr,
1656         &dev_attr_num_grat_arp.attr,
1657         &dev_attr_num_unsol_na.attr,
1658         &dev_attr_miimon.attr,
1659         &dev_attr_primary.attr,
1660         &dev_attr_primary_reselect.attr,
1661         &dev_attr_use_carrier.attr,
1662         &dev_attr_active_slave.attr,
1663         &dev_attr_mii_status.attr,
1664         &dev_attr_ad_aggregator.attr,
1665         &dev_attr_ad_num_ports.attr,
1666         &dev_attr_ad_actor_key.attr,
1667         &dev_attr_ad_partner_key.attr,
1668         &dev_attr_ad_partner_mac.attr,
1669         &dev_attr_queue_id.attr,
1670         &dev_attr_all_slaves_active.attr,
1671         &dev_attr_resend_igmp.attr,
1672         &dev_attr_min_links.attr,
1673         NULL,
1674 };
1675
1676 static struct attribute_group bonding_group = {
1677         .name = "bonding",
1678         .attrs = per_bond_attrs,
1679 };
1680
1681 /*
1682  * Initialize sysfs.  This sets up the bonding_masters file in
1683  * /sys/class/net.
1684  */
1685 int bond_create_sysfs(struct bond_net *bn)
1686 {
1687         int ret;
1688
1689         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1690         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1691
1692         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1693         /*
1694          * Permit multiple loads of the module by ignoring failures to
1695          * create the bonding_masters sysfs file.  Bonding devices
1696          * created by second or subsequent loads of the module will
1697          * not be listed in, or controllable by, bonding_masters, but
1698          * will have the usual "bonding" sysfs directory.
1699          *
1700          * This is done to preserve backwards compatibility for
1701          * initscripts/sysconfig, which load bonding multiple times to
1702          * configure multiple bonding devices.
1703          */
1704         if (ret == -EEXIST) {
1705                 /* Is someone being kinky and naming a device bonding_master? */
1706                 if (__dev_get_by_name(bn->net,
1707                                       class_attr_bonding_masters.attr.name))
1708                         pr_err("network device named %s already exists in sysfs",
1709                                class_attr_bonding_masters.attr.name);
1710                 ret = 0;
1711         }
1712
1713         return ret;
1714
1715 }
1716
1717 /*
1718  * Remove /sys/class/net/bonding_masters.
1719  */
1720 void bond_destroy_sysfs(struct bond_net *bn)
1721 {
1722         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1723 }
1724
1725 /*
1726  * Initialize sysfs for each bond.  This sets up and registers
1727  * the 'bondctl' directory for each individual bond under /sys/class/net.
1728  */
1729 void bond_prepare_sysfs_group(struct bonding *bond)
1730 {
1731         bond->dev->sysfs_groups[0] = &bonding_group;
1732 }
1733