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 /*
 172  * Show the slaves in the current bond.
 173  */
 174 static ssize_t bonding_show_slaves(struct device *d,
 175                                    struct device_attribute *attr, char *buf)
 176 {
 177         struct bonding *bond = to_bond(d);
 178         struct list_head *iter;
 179         struct slave *slave;
 180         int res = 0;
 181
 182         if (!rtnl_trylock())
 183                 return restart_syscall();
 184
 185         bond_for_each_slave(bond, slave, iter) {
 186                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 187                         /* not enough space for another interface name */
 188                         if ((PAGE_SIZE - res) > 10)
 189                                 res = PAGE_SIZE - 10;
 190                         res += sprintf(buf + res, "++more++ ");
 191                         break;
 192                 }
 193                 res += sprintf(buf + res, "%s ", slave->dev->name);
 194         }
 195
 196         rtnl_unlock();
 197
 198         if (res)
 199                 buf[res-1] = '\n'; /* eat the leftover space */
 200
 201         return res;
 202 }
 203
 204 /*
 205  * Set the slaves in the current bond.
 206  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 207  * All hard work should be done there.
 208  */
 209 static ssize_t bonding_store_slaves(struct device *d,
 210                                     struct device_attribute *attr,
 211                                     const char *buffer, size_t count)
 212 {
 213         char command[IFNAMSIZ + 1] = { 0, };
 214         char *ifname;
 215         int res, ret = count;
 216         struct net_device *dev;
 217         struct bonding *bond = to_bond(d);
 218
 219         if (!rtnl_trylock())
 220                 return restart_syscall();
 221
 222         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 223         ifname = command + 1;
 224         if ((strlen(command) <= 1) ||
 225             !dev_valid_name(ifname))
 226                 goto err_no_cmd;
 227
 228         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 229         if (!dev) {
 230                 pr_info("%s: Interface %s does not exist!\n",
 231                         bond->dev->name, ifname);
 232                 ret = -ENODEV;
 233                 goto out;
 234         }
 235
 236         switch (command[0]) {
 237         case '+':
 238                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 239                 res = bond_enslave(bond->dev, dev);
 240                 break;
 241
 242         case '-':
 243                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 244                 res = bond_release(bond->dev, dev);
 245                 break;
 246
 247         default:
 248                 goto err_no_cmd;
 249         }
 250
 251         if (res)
 252                 ret = res;
 253         goto out;
 254
 255 err_no_cmd:
 256         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 257                bond->dev->name);
 258         ret = -EPERM;
 259
 260 out:
 261         rtnl_unlock();
 262         return ret;
 263 }
 264
 265 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 266                    bonding_store_slaves);
 267
 268 /*
 269  * Show and set the bonding mode.  The bond interface must be down to
 270  * change the mode.
 271  */
 272 static ssize_t bonding_show_mode(struct device *d,
 273                                  struct device_attribute *attr, char *buf)
 274 {
 275         struct bonding *bond = to_bond(d);
 276
 277         return sprintf(buf, "%s %d\n",
 278                         bond_mode_tbl[bond->params.mode].modename,
 279                         bond->params.mode);
 280 }
 281
 282 static ssize_t bonding_store_mode(struct device *d,
 283                                   struct device_attribute *attr,
 284                                   const char *buf, size_t count)
 285 {
 286         int new_value, ret;
 287         struct bonding *bond = to_bond(d);
 288
 289         new_value = bond_parse_parm(buf, bond_mode_tbl);
 290         if (new_value < 0)  {
 291                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 292                        bond->dev->name, (int)strlen(buf) - 1, buf);
 293                 return -EINVAL;
 294         }
 295         if (!rtnl_trylock())
 296                 return restart_syscall();
 297
 298         ret = bond_option_mode_set(bond, new_value);
 299         if (!ret) {
 300                 pr_info("%s: setting mode to %s (%d).\n",
 301                         bond->dev->name, bond_mode_tbl[new_value].modename,
 302                         new_value);
 303                 ret = count;
 304         }
 305
 306         rtnl_unlock();
 307         return ret;
 308 }
 309 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 310                    bonding_show_mode, bonding_store_mode);
 311
 312 /*
 313  * Show and set the bonding transmit hash method.
 314  */
 315 static ssize_t bonding_show_xmit_hash(struct device *d,
 316                                       struct device_attribute *attr,
 317                                       char *buf)
 318 {
 319         struct bonding *bond = to_bond(d);
 320
 321         return sprintf(buf, "%s %d\n",
 322                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 323                        bond->params.xmit_policy);
 324 }
 325
 326 static ssize_t bonding_store_xmit_hash(struct device *d,
 327                                        struct device_attribute *attr,
 328                                        const char *buf, size_t count)
 329 {
 330         int new_value, ret = count;
 331         struct bonding *bond = to_bond(d);
 332
 333         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 334         if (new_value < 0)  {
 335                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 336                        bond->dev->name,
 337                        (int)strlen(buf) - 1, buf);
 338                 ret = -EINVAL;
 339         } else {
 340                 bond->params.xmit_policy = new_value;
 341                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 342                         bond->dev->name,
 343                         xmit_hashtype_tbl[new_value].modename, new_value);
 344         }
 345
 346         return ret;
 347 }
 348 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 349                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 350
 351 /*
 352  * Show and set arp_validate.
 353  */
 354 static ssize_t bonding_show_arp_validate(struct device *d,
 355                                          struct device_attribute *attr,
 356                                          char *buf)
 357 {
 358         struct bonding *bond = to_bond(d);
 359
 360         return sprintf(buf, "%s %d\n",
 361                        arp_validate_tbl[bond->params.arp_validate].modename,
 362                        bond->params.arp_validate);
 363 }
 364
 365 static ssize_t bonding_store_arp_validate(struct device *d,
 366                                           struct device_attribute *attr,
 367                                           const char *buf, size_t count)
 368 {
 369         struct bonding *bond = to_bond(d);
 370         int new_value, ret = count;
 371
 372         if (!rtnl_trylock())
 373                 return restart_syscall();
 374         new_value = bond_parse_parm(buf, arp_validate_tbl);
 375         if (new_value < 0) {
 376                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 377                        bond->dev->name, buf);
 378                 ret = -EINVAL;
 379                 goto out;
 380         }
 381         if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
 382                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 383                        bond->dev->name);
 384                 ret = -EINVAL;
 385                 goto out;
 386         }
 387         pr_info("%s: setting arp_validate to %s (%d).\n",
 388                 bond->dev->name, arp_validate_tbl[new_value].modename,
 389                 new_value);
 390
 391         if (bond->dev->flags & IFF_UP) {
 392                 if (!new_value)
 393                         bond->recv_probe = NULL;
 394                 else if (bond->params.arp_interval)
 395                         bond->recv_probe = bond_arp_rcv;
 396         }
 397         bond->params.arp_validate = new_value;
 398 out:
 399         rtnl_unlock();
 400
 401         return ret;
 402 }
 403
 404 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 405                    bonding_store_arp_validate);
 406 /*
 407  * Show and set arp_all_targets.
 408  */
 409 static ssize_t bonding_show_arp_all_targets(struct device *d,
 410                                          struct device_attribute *attr,
 411                                          char *buf)
 412 {
 413         struct bonding *bond = to_bond(d);
 414         int value = bond->params.arp_all_targets;
 415
 416         return sprintf(buf, "%s %d\n", arp_all_targets_tbl[value].modename,
 417                        value);
 418 }
 419
 420 static ssize_t bonding_store_arp_all_targets(struct device *d,
 421                                           struct device_attribute *attr,
 422                                           const char *buf, size_t count)
 423 {
 424         struct bonding *bond = to_bond(d);
 425         int new_value;
 426
 427         new_value = bond_parse_parm(buf, arp_all_targets_tbl);
 428         if (new_value < 0) {
 429                 pr_err("%s: Ignoring invalid arp_all_targets value %s\n",
 430                        bond->dev->name, buf);
 431                 return -EINVAL;
 432         }
 433         pr_info("%s: setting arp_all_targets to %s (%d).\n",
 434                 bond->dev->name, arp_all_targets_tbl[new_value].modename,
 435                 new_value);
 436
 437         bond->params.arp_all_targets = new_value;
 438
 439         return count;
 440 }
 441
 442 static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
 443                    bonding_show_arp_all_targets, bonding_store_arp_all_targets);
 444
 445 /*
 446  * Show and store fail_over_mac.  User only allowed to change the
 447  * value when there are no slaves.
 448  */
 449 static ssize_t bonding_show_fail_over_mac(struct device *d,
 450                                           struct device_attribute *attr,
 451                                           char *buf)
 452 {
 453         struct bonding *bond = to_bond(d);
 454
 455         return sprintf(buf, "%s %d\n",
 456                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 457                        bond->params.fail_over_mac);
 458 }
 459
 460 static ssize_t bonding_store_fail_over_mac(struct device *d,
 461                                            struct device_attribute *attr,
 462                                            const char *buf, size_t count)
 463 {
 464         int new_value, ret = count;
 465         struct bonding *bond = to_bond(d);
 466
 467         if (!rtnl_trylock())
 468                 return restart_syscall();
 469
 470         if (bond_has_slaves(bond)) {
 471                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 472                        bond->dev->name);
 473                 ret = -EPERM;
 474                 goto out;
 475         }
 476
 477         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 478         if (new_value < 0) {
 479                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 480                        bond->dev->name, buf);
 481                 ret = -EINVAL;
 482                 goto out;
 483         }
 484
 485         bond->params.fail_over_mac = new_value;
 486         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 487                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 488                 new_value);
 489
 490 out:
 491         rtnl_unlock();
 492         return ret;
 493 }
 494
 495 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 496                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 497
 498 /*
 499  * Show and set the arp timer interval.  There are two tricky bits
 500  * here.  First, if ARP monitoring is activated, then we must disable
 501  * MII monitoring.  Second, if the ARP timer isn't running, we must
 502  * start it.
 503  */
 504 static ssize_t bonding_show_arp_interval(struct device *d,
 505                                          struct device_attribute *attr,
 506                                          char *buf)
 507 {
 508         struct bonding *bond = to_bond(d);
 509
 510         return sprintf(buf, "%d\n", bond->params.arp_interval);
 511 }
 512
 513 static ssize_t bonding_store_arp_interval(struct device *d,
 514                                           struct device_attribute *attr,
 515                                           const char *buf, size_t count)
 516 {
 517         struct bonding *bond = to_bond(d);
 518         int new_value, ret = count;
 519
 520         if (!rtnl_trylock())
 521                 return restart_syscall();
 522         if (sscanf(buf, "%d", &new_value) != 1) {
 523                 pr_err("%s: no arp_interval value specified.\n",
 524                        bond->dev->name);
 525                 ret = -EINVAL;
 526                 goto out;
 527         }
 528         if (new_value < 0) {
 529                 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
 530                        bond->dev->name, new_value, INT_MAX);
 531                 ret = -EINVAL;
 532                 goto out;
 533         }
 534         if (bond->params.mode == BOND_MODE_ALB ||
 535             bond->params.mode == BOND_MODE_TLB) {
 536                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 537                         bond->dev->name, bond->dev->name);
 538                 ret = -EINVAL;
 539                 goto out;
 540         }
 541         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 542                 bond->dev->name, new_value);
 543         bond->params.arp_interval = new_value;
 544         if (new_value) {
 545                 if (bond->params.miimon) {
 546                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 547                                 bond->dev->name, bond->dev->name);
 548                         bond->params.miimon = 0;
 549                 }
 550                 if (!bond->params.arp_targets[0])
 551                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 552                                 bond->dev->name);
 553         }
 554         if (bond->dev->flags & IFF_UP) {
 555                 /* If the interface is up, we may need to fire off
 556                  * the ARP timer.  If the interface is down, the
 557                  * timer will get fired off when the open function
 558                  * is called.
 559                  */
 560                 if (!new_value) {
 561                         if (bond->params.arp_validate)
 562                                 bond->recv_probe = NULL;
 563                         cancel_delayed_work_sync(&bond->arp_work);
 564                 } else {
 565                         /* arp_validate can be set only in active-backup mode */
 566                         if (bond->params.arp_validate)
 567                                 bond->recv_probe = bond_arp_rcv;
 568                         cancel_delayed_work_sync(&bond->mii_work);
 569                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 570                 }
 571         }
 572 out:
 573         rtnl_unlock();
 574         return ret;
 575 }
 576 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 577                    bonding_show_arp_interval, bonding_store_arp_interval);
 578
 579 /*
 580  * Show and set the arp targets.
 581  */
 582 static ssize_t bonding_show_arp_targets(struct device *d,
 583                                         struct device_attribute *attr,
 584                                         char *buf)
 585 {
 586         int i, res = 0;
 587         struct bonding *bond = to_bond(d);
 588
 589         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 590                 if (bond->params.arp_targets[i])
 591                         res += sprintf(buf + res, "%pI4 ",
 592                                        &bond->params.arp_targets[i]);
 593         }
 594         if (res)
 595                 buf[res-1] = '\n'; /* eat the leftover space */
 596         return res;
 597 }
 598
 599 static ssize_t bonding_store_arp_targets(struct device *d,
 600                                          struct device_attribute *attr,
 601                                          const char *buf, size_t count)
 602 {
 603         struct bonding *bond = to_bond(d);
 604         struct list_head *iter;
 605         struct slave *slave;
 606         __be32 newtarget, *targets;
 607         unsigned long *targets_rx;
 608         int ind, i, j, ret = -EINVAL;
 609
 610         if (!rtnl_trylock())
 611                 return restart_syscall();
 612
 613         targets = bond->params.arp_targets;
 614         newtarget = in_aton(buf + 1);
 615         /* look for adds */
 616         if (buf[0] == '+') {
 617                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 618                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 619                                bond->dev->name, &newtarget);
 620                         goto out;
 621                 }
 622
 623                 if (bond_get_targets_ip(targets, newtarget) != -1) { /* dup */
 624                         pr_err("%s: ARP target %pI4 is already present\n",
 625                                bond->dev->name, &newtarget);
 626                         goto out;
 627                 }
 628
 629                 ind = bond_get_targets_ip(targets, 0); /* first free slot */
 630                 if (ind == -1) {
 631                         pr_err("%s: ARP target table is full!\n",
 632                                bond->dev->name);
 633                         goto out;
 634                 }
 635
 636                 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name,
 637                          &newtarget);
 638                 /* not to race with bond_arp_rcv */
 639                 write_lock_bh(&bond->lock);
 640                 bond_for_each_slave(bond, slave, iter)
 641                         slave->target_last_arp_rx[ind] = jiffies;
 642                 targets[ind] = newtarget;
 643                 write_unlock_bh(&bond->lock);
 644         } else if (buf[0] == '-')       {
 645                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 646                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 647                                bond->dev->name, &newtarget);
 648                         goto out;
 649                 }
 650
 651                 ind = bond_get_targets_ip(targets, newtarget);
 652                 if (ind == -1) {
 653                         pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
 654                                 bond->dev->name, &newtarget);
 655                         goto out;
 656                 }
 657
 658                 if (ind == 0 && !targets[1] && bond->params.arp_interval)
 659                         pr_warn("%s: removing last arp target with arp_interval on\n",
 660                                 bond->dev->name);
 661
 662                 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
 663                         &newtarget);
 664
 665                 write_lock_bh(&bond->lock);
 666                 bond_for_each_slave(bond, slave, iter) {
 667                         targets_rx = slave->target_last_arp_rx;
 668                         j = ind;
 669                         for (; (j < BOND_MAX_ARP_TARGETS-1) && targets[j+1]; j++)
 670                                 targets_rx[j] = targets_rx[j+1];
 671                         targets_rx[j] = 0;
 672                 }
 673                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 674                         targets[i] = targets[i+1];
 675                 targets[i] = 0;
 676                 write_unlock_bh(&bond->lock);
 677         } else {
 678                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 679                        bond->dev->name);
 680                 ret = -EPERM;
 681                 goto out;
 682         }
 683
 684         ret = count;
 685 out:
 686         rtnl_unlock();
 687         return ret;
 688 }
 689 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 690
 691 /*
 692  * Show and set the up and down delays.  These must be multiples of the
 693  * MII monitoring value, and are stored internally as the multiplier.
 694  * Thus, we must translate to MS for the real world.
 695  */
 696 static ssize_t bonding_show_downdelay(struct device *d,
 697                                       struct device_attribute *attr,
 698                                       char *buf)
 699 {
 700         struct bonding *bond = to_bond(d);
 701
 702         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 703 }
 704
 705 static ssize_t bonding_store_downdelay(struct device *d,
 706                                        struct device_attribute *attr,
 707                                        const char *buf, size_t count)
 708 {
 709         int new_value, ret = count;
 710         struct bonding *bond = to_bond(d);
 711
 712         if (!(bond->params.miimon)) {
 713                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 714                        bond->dev->name);
 715                 ret = -EPERM;
 716                 goto out;
 717         }
 718
 719         if (sscanf(buf, "%d", &new_value) != 1) {
 720                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 721                 ret = -EINVAL;
 722                 goto out;
 723         }
 724         if (new_value < 0) {
 725                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 726                        bond->dev->name, new_value, 0, INT_MAX);
 727                 ret = -EINVAL;
 728                 goto out;
 729         } else {
 730                 if ((new_value % bond->params.miimon) != 0) {
 731                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 732                                    bond->dev->name, new_value,
 733                                    bond->params.miimon,
 734                                    (new_value / bond->params.miimon) *
 735                                    bond->params.miimon);
 736                 }
 737                 bond->params.downdelay = new_value / bond->params.miimon;
 738                 pr_info("%s: Setting down delay to %d.\n",
 739                         bond->dev->name,
 740                         bond->params.downdelay * bond->params.miimon);
 741
 742         }
 743
 744 out:
 745         return ret;
 746 }
 747 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 748                    bonding_show_downdelay, bonding_store_downdelay);
 749
 750 static ssize_t bonding_show_updelay(struct device *d,
 751                                     struct device_attribute *attr,
 752                                     char *buf)
 753 {
 754         struct bonding *bond = to_bond(d);
 755
 756         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 757
 758 }
 759
 760 static ssize_t bonding_store_updelay(struct device *d,
 761                                      struct device_attribute *attr,
 762                                      const char *buf, size_t count)
 763 {
 764         int new_value, ret = count;
 765         struct bonding *bond = to_bond(d);
 766
 767         if (!(bond->params.miimon)) {
 768                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 769                        bond->dev->name);
 770                 ret = -EPERM;
 771                 goto out;
 772         }
 773
 774         if (sscanf(buf, "%d", &new_value) != 1) {
 775                 pr_err("%s: no up delay value specified.\n",
 776                        bond->dev->name);
 777                 ret = -EINVAL;
 778                 goto out;
 779         }
 780         if (new_value < 0) {
 781                 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
 782                        bond->dev->name, new_value, 0, INT_MAX);
 783                 ret = -EINVAL;
 784                 goto out;
 785         } else {
 786                 if ((new_value % bond->params.miimon) != 0) {
 787                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 788                                    bond->dev->name, new_value,
 789                                    bond->params.miimon,
 790                                    (new_value / bond->params.miimon) *
 791                                    bond->params.miimon);
 792                 }
 793                 bond->params.updelay = new_value / bond->params.miimon;
 794                 pr_info("%s: Setting up delay to %d.\n",
 795                         bond->dev->name,
 796                         bond->params.updelay * bond->params.miimon);
 797         }
 798
 799 out:
 800         return ret;
 801 }
 802 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 803                    bonding_show_updelay, bonding_store_updelay);
 804
 805 /*
 806  * Show and set the LACP interval.  Interface must be down, and the mode
 807  * must be set to 802.3ad mode.
 808  */
 809 static ssize_t bonding_show_lacp(struct device *d,
 810                                  struct device_attribute *attr,
 811                                  char *buf)
 812 {
 813         struct bonding *bond = to_bond(d);
 814
 815         return sprintf(buf, "%s %d\n",
 816                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 817                 bond->params.lacp_fast);
 818 }
 819
 820 static ssize_t bonding_store_lacp(struct device *d,
 821                                   struct device_attribute *attr,
 822                                   const char *buf, size_t count)
 823 {
 824         struct bonding *bond = to_bond(d);
 825         int new_value, ret = count;
 826
 827         if (!rtnl_trylock())
 828                 return restart_syscall();
 829
 830         if (bond->dev->flags & IFF_UP) {
 831                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 832                        bond->dev->name);
 833                 ret = -EPERM;
 834                 goto out;
 835         }
 836
 837         if (bond->params.mode != BOND_MODE_8023AD) {
 838                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 839                        bond->dev->name);
 840                 ret = -EPERM;
 841                 goto out;
 842         }
 843
 844         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 845
 846         if ((new_value == 1) || (new_value == 0)) {
 847                 bond->params.lacp_fast = new_value;
 848                 bond_3ad_update_lacp_rate(bond);
 849                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 850                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 851                         new_value);
 852         } else {
 853                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 854                        bond->dev->name, (int)strlen(buf) - 1, buf);
 855                 ret = -EINVAL;
 856         }
 857 out:
 858         rtnl_unlock();
 859
 860         return ret;
 861 }
 862 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 863                    bonding_show_lacp, bonding_store_lacp);
 864
 865 static ssize_t bonding_show_min_links(struct device *d,
 866                                       struct device_attribute *attr,
 867                                       char *buf)
 868 {
 869         struct bonding *bond = to_bond(d);
 870
 871         return sprintf(buf, "%d\n", bond->params.min_links);
 872 }
 873
 874 static ssize_t bonding_store_min_links(struct device *d,
 875                                        struct device_attribute *attr,
 876                                        const char *buf, size_t count)
 877 {
 878         struct bonding *bond = to_bond(d);
 879         int ret;
 880         unsigned int new_value;
 881
 882         ret = kstrtouint(buf, 0, &new_value);
 883         if (ret < 0) {
 884                 pr_err("%s: Ignoring invalid min links value %s.\n",
 885                        bond->dev->name, buf);
 886                 return ret;
 887         }
 888
 889         pr_info("%s: Setting min links value to %u\n",
 890                 bond->dev->name, new_value);
 891         bond->params.min_links = new_value;
 892         return count;
 893 }
 894 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 895                    bonding_show_min_links, bonding_store_min_links);
 896
 897 static ssize_t bonding_show_ad_select(struct device *d,
 898                                       struct device_attribute *attr,
 899                                       char *buf)
 900 {
 901         struct bonding *bond = to_bond(d);
 902
 903         return sprintf(buf, "%s %d\n",
 904                 ad_select_tbl[bond->params.ad_select].modename,
 905                 bond->params.ad_select);
 906 }
 907
 908
 909 static ssize_t bonding_store_ad_select(struct device *d,
 910                                        struct device_attribute *attr,
 911                                        const char *buf, size_t count)
 912 {
 913         int new_value, ret = count;
 914         struct bonding *bond = to_bond(d);
 915
 916         if (bond->dev->flags & IFF_UP) {
 917                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 918                        bond->dev->name);
 919                 ret = -EPERM;
 920                 goto out;
 921         }
 922
 923         new_value = bond_parse_parm(buf, ad_select_tbl);
 924
 925         if (new_value != -1) {
 926                 bond->params.ad_select = new_value;
 927                 pr_info("%s: Setting ad_select to %s (%d).\n",
 928                         bond->dev->name, ad_select_tbl[new_value].modename,
 929                         new_value);
 930         } else {
 931                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 932                        bond->dev->name, (int)strlen(buf) - 1, buf);
 933                 ret = -EINVAL;
 934         }
 935 out:
 936         return ret;
 937 }
 938 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 939                    bonding_show_ad_select, bonding_store_ad_select);
 940
 941 /*
 942  * Show and set the number of peer notifications to send after a failover event.
 943  */
 944 static ssize_t bonding_show_num_peer_notif(struct device *d,
 945                                            struct device_attribute *attr,
 946                                            char *buf)
 947 {
 948         struct bonding *bond = to_bond(d);
 949         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 950 }
 951
 952 static ssize_t bonding_store_num_peer_notif(struct device *d,
 953                                             struct device_attribute *attr,
 954                                             const char *buf, size_t count)
 955 {
 956         struct bonding *bond = to_bond(d);
 957         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 958         return err ? err : count;
 959 }
 960 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 961                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 962 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 963                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 964
 965 /*
 966  * Show and set the MII monitor interval.  There are two tricky bits
 967  * here.  First, if MII monitoring is activated, then we must disable
 968  * ARP monitoring.  Second, if the timer isn't running, we must
 969  * start it.
 970  */
 971 static ssize_t bonding_show_miimon(struct device *d,
 972                                    struct device_attribute *attr,
 973                                    char *buf)
 974 {
 975         struct bonding *bond = to_bond(d);
 976
 977         return sprintf(buf, "%d\n", bond->params.miimon);
 978 }
 979
 980 static ssize_t bonding_store_miimon(struct device *d,
 981                                     struct device_attribute *attr,
 982                                     const char *buf, size_t count)
 983 {
 984         int new_value, ret = count;
 985         struct bonding *bond = to_bond(d);
 986
 987         if (!rtnl_trylock())
 988                 return restart_syscall();
 989         if (sscanf(buf, "%d", &new_value) != 1) {
 990                 pr_err("%s: no miimon value specified.\n",
 991                        bond->dev->name);
 992                 ret = -EINVAL;
 993                 goto out;
 994         }
 995         if (new_value < 0) {
 996                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 997                        bond->dev->name, new_value, 0, INT_MAX);
 998                 ret = -EINVAL;
 999                 goto out;
1000         }
1001         pr_info("%s: Setting MII monitoring interval to %d.\n",
1002                 bond->dev->name, new_value);
1003         bond->params.miimon = new_value;
1004         if (bond->params.updelay)
1005                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
1006                         bond->dev->name,
1007                         bond->params.updelay * bond->params.miimon);
1008         if (bond->params.downdelay)
1009                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1010                         bond->dev->name,
1011                         bond->params.downdelay * bond->params.miimon);
1012         if (new_value && bond->params.arp_interval) {
1013                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1014                         bond->dev->name);
1015                 bond->params.arp_interval = 0;
1016                 if (bond->params.arp_validate)
1017                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1018         }
1019         if (bond->dev->flags & IFF_UP) {
1020                 /* If the interface is up, we may need to fire off
1021                  * the MII timer. If the interface is down, the
1022                  * timer will get fired off when the open function
1023                  * is called.
1024                  */
1025                 if (!new_value) {
1026                         cancel_delayed_work_sync(&bond->mii_work);
1027                 } else {
1028                         cancel_delayed_work_sync(&bond->arp_work);
1029                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1030                 }
1031         }
1032 out:
1033         rtnl_unlock();
1034         return ret;
1035 }
1036 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1037                    bonding_show_miimon, bonding_store_miimon);
1038
1039 /*
1040  * Show and set the primary slave.  The store function is much
1041  * simpler than bonding_store_slaves function because it only needs to
1042  * handle one interface name.
1043  * The bond must be a mode that supports a primary for this be
1044  * set.
1045  */
1046 static ssize_t bonding_show_primary(struct device *d,
1047                                     struct device_attribute *attr,
1048                                     char *buf)
1049 {
1050         int count = 0;
1051         struct bonding *bond = to_bond(d);
1052
1053         if (bond->primary_slave)
1054                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1055
1056         return count;
1057 }
1058
1059 static ssize_t bonding_store_primary(struct device *d,
1060                                      struct device_attribute *attr,
1061                                      const char *buf, size_t count)
1062 {
1063         struct bonding *bond = to_bond(d);
1064         struct list_head *iter;
1065         char ifname[IFNAMSIZ];
1066         struct slave *slave;
1067
1068         if (!rtnl_trylock())
1069                 return restart_syscall();
1070         block_netpoll_tx();
1071         read_lock(&bond->lock);
1072         write_lock_bh(&bond->curr_slave_lock);
1073
1074         if (!USES_PRIMARY(bond->params.mode)) {
1075                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1076                         bond->dev->name, bond->dev->name, bond->params.mode);
1077                 goto out;
1078         }
1079
1080         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1081
1082         /* check to see if we are clearing primary */
1083         if (!strlen(ifname) || buf[0] == '\n') {
1084                 pr_info("%s: Setting primary slave to None.\n",
1085                         bond->dev->name);
1086                 bond->primary_slave = NULL;
1087                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1088                 bond_select_active_slave(bond);
1089                 goto out;
1090         }
1091
1092         bond_for_each_slave(bond, slave, iter) {
1093                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1094                         pr_info("%s: Setting %s as primary slave.\n",
1095                                 bond->dev->name, slave->dev->name);
1096                         bond->primary_slave = slave;
1097                         strcpy(bond->params.primary, slave->dev->name);
1098                         bond_select_active_slave(bond);
1099                         goto out;
1100                 }
1101         }
1102
1103         strncpy(bond->params.primary, ifname, IFNAMSIZ);
1104         bond->params.primary[IFNAMSIZ - 1] = 0;
1105
1106         pr_info("%s: Recording %s as primary, "
1107                 "but it has not been enslaved to %s yet.\n",
1108                 bond->dev->name, ifname, bond->dev->name);
1109 out:
1110         write_unlock_bh(&bond->curr_slave_lock);
1111         read_unlock(&bond->lock);
1112         unblock_netpoll_tx();
1113         rtnl_unlock();
1114
1115         return count;
1116 }
1117 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1118                    bonding_show_primary, bonding_store_primary);
1119
1120 /*
1121  * Show and set the primary_reselect flag.
1122  */
1123 static ssize_t bonding_show_primary_reselect(struct device *d,
1124                                              struct device_attribute *attr,
1125                                              char *buf)
1126 {
1127         struct bonding *bond = to_bond(d);
1128
1129         return sprintf(buf, "%s %d\n",
1130                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1131                        bond->params.primary_reselect);
1132 }
1133
1134 static ssize_t bonding_store_primary_reselect(struct device *d,
1135                                               struct device_attribute *attr,
1136                                               const char *buf, size_t count)
1137 {
1138         int new_value, ret = count;
1139         struct bonding *bond = to_bond(d);
1140
1141         if (!rtnl_trylock())
1142                 return restart_syscall();
1143
1144         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1145         if (new_value < 0)  {
1146                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1147                        bond->dev->name,
1148                        (int) strlen(buf) - 1, buf);
1149                 ret = -EINVAL;
1150                 goto out;
1151         }
1152
1153         bond->params.primary_reselect = new_value;
1154         pr_info("%s: setting primary_reselect to %s (%d).\n",
1155                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1156                 new_value);
1157
1158         block_netpoll_tx();
1159         read_lock(&bond->lock);
1160         write_lock_bh(&bond->curr_slave_lock);
1161         bond_select_active_slave(bond);
1162         write_unlock_bh(&bond->curr_slave_lock);
1163         read_unlock(&bond->lock);
1164         unblock_netpoll_tx();
1165 out:
1166         rtnl_unlock();
1167         return ret;
1168 }
1169 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1170                    bonding_show_primary_reselect,
1171                    bonding_store_primary_reselect);
1172
1173 /*
1174  * Show and set the use_carrier flag.
1175  */
1176 static ssize_t bonding_show_carrier(struct device *d,
1177                                     struct device_attribute *attr,
1178                                     char *buf)
1179 {
1180         struct bonding *bond = to_bond(d);
1181
1182         return sprintf(buf, "%d\n", bond->params.use_carrier);
1183 }
1184
1185 static ssize_t bonding_store_carrier(struct device *d,
1186                                      struct device_attribute *attr,
1187                                      const char *buf, size_t count)
1188 {
1189         int new_value, ret = count;
1190         struct bonding *bond = to_bond(d);
1191
1192
1193         if (sscanf(buf, "%d", &new_value) != 1) {
1194                 pr_err("%s: no use_carrier value specified.\n",
1195                        bond->dev->name);
1196                 ret = -EINVAL;
1197                 goto out;
1198         }
1199         if ((new_value == 0) || (new_value == 1)) {
1200                 bond->params.use_carrier = new_value;
1201                 pr_info("%s: Setting use_carrier to %d.\n",
1202                         bond->dev->name, new_value);
1203         } else {
1204                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1205                         bond->dev->name, new_value);
1206         }
1207 out:
1208         return ret;
1209 }
1210 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1211                    bonding_show_carrier, bonding_store_carrier);
1212
1213
1214 /*
1215  * Show and set currently active_slave.
1216  */
1217 static ssize_t bonding_show_active_slave(struct device *d,
1218                                          struct device_attribute *attr,
1219                                          char *buf)
1220 {
1221         struct bonding *bond = to_bond(d);
1222         struct net_device *slave_dev;
1223         int count = 0;
1224
1225         rcu_read_lock();
1226         slave_dev = bond_option_active_slave_get_rcu(bond);
1227         if (slave_dev)
1228                 count = sprintf(buf, "%s\n", slave_dev->name);
1229         rcu_read_unlock();
1230
1231         return count;
1232 }
1233
1234 static ssize_t bonding_store_active_slave(struct device *d,
1235                                           struct device_attribute *attr,
1236                                           const char *buf, size_t count)
1237 {
1238         int ret;
1239         struct bonding *bond = to_bond(d);
1240         char ifname[IFNAMSIZ];
1241         struct net_device *dev;
1242
1243         if (!rtnl_trylock())
1244                 return restart_syscall();
1245
1246         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1247         if (!strlen(ifname) || buf[0] == '\n') {
1248                 dev = NULL;
1249         } else {
1250                 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1251                 if (!dev) {
1252                         ret = -ENODEV;
1253                         goto out;
1254                 }
1255         }
1256
1257         ret = bond_option_active_slave_set(bond, dev);
1258         if (!ret)
1259                 ret = count;
1260
1261  out:
1262         rtnl_unlock();
1263
1264         return ret;
1265
1266 }
1267 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1268                    bonding_show_active_slave, bonding_store_active_slave);
1269
1270
1271 /*
1272  * Show link status of the bond interface.
1273  */
1274 static ssize_t bonding_show_mii_status(struct device *d,
1275                                        struct device_attribute *attr,
1276                                        char *buf)
1277 {
1278         struct bonding *bond = to_bond(d);
1279
1280         return sprintf(buf, "%s\n", bond->curr_active_slave ? "up" : "down");
1281 }
1282 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1283
1284 /*
1285  * Show current 802.3ad aggregator ID.
1286  */
1287 static ssize_t bonding_show_ad_aggregator(struct device *d,
1288                                           struct device_attribute *attr,
1289                                           char *buf)
1290 {
1291         int count = 0;
1292         struct bonding *bond = to_bond(d);
1293
1294         if (bond->params.mode == BOND_MODE_8023AD) {
1295                 struct ad_info ad_info;
1296                 count = sprintf(buf, "%d\n",
1297                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1298                                 ?  0 : ad_info.aggregator_id);
1299         }
1300
1301         return count;
1302 }
1303 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1304
1305
1306 /*
1307  * Show number of active 802.3ad ports.
1308  */
1309 static ssize_t bonding_show_ad_num_ports(struct device *d,
1310                                          struct device_attribute *attr,
1311                                          char *buf)
1312 {
1313         int count = 0;
1314         struct bonding *bond = to_bond(d);
1315
1316         if (bond->params.mode == BOND_MODE_8023AD) {
1317                 struct ad_info ad_info;
1318                 count = sprintf(buf, "%d\n",
1319                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1320                                 ?  0 : ad_info.ports);
1321         }
1322
1323         return count;
1324 }
1325 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1326
1327
1328 /*
1329  * Show current 802.3ad actor key.
1330  */
1331 static ssize_t bonding_show_ad_actor_key(struct device *d,
1332                                          struct device_attribute *attr,
1333                                          char *buf)
1334 {
1335         int count = 0;
1336         struct bonding *bond = to_bond(d);
1337
1338         if (bond->params.mode == BOND_MODE_8023AD) {
1339                 struct ad_info ad_info;
1340                 count = sprintf(buf, "%d\n",
1341                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1342                                 ?  0 : ad_info.actor_key);
1343         }
1344
1345         return count;
1346 }
1347 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1348
1349
1350 /*
1351  * Show current 802.3ad partner key.
1352  */
1353 static ssize_t bonding_show_ad_partner_key(struct device *d,
1354                                            struct device_attribute *attr,
1355                                            char *buf)
1356 {
1357         int count = 0;
1358         struct bonding *bond = to_bond(d);
1359
1360         if (bond->params.mode == BOND_MODE_8023AD) {
1361                 struct ad_info ad_info;
1362                 count = sprintf(buf, "%d\n",
1363                                 bond_3ad_get_active_agg_info(bond, &ad_info)
1364                                 ?  0 : ad_info.partner_key);
1365         }
1366
1367         return count;
1368 }
1369 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1370
1371
1372 /*
1373  * Show current 802.3ad partner mac.
1374  */
1375 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1376                                            struct device_attribute *attr,
1377                                            char *buf)
1378 {
1379         int count = 0;
1380         struct bonding *bond = to_bond(d);
1381
1382         if (bond->params.mode == BOND_MODE_8023AD) {
1383                 struct ad_info ad_info;
1384                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1385                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1386         }
1387
1388         return count;
1389 }
1390 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1391
1392 /*
1393  * Show the queue_ids of the slaves in the current bond.
1394  */
1395 static ssize_t bonding_show_queue_id(struct device *d,
1396                                      struct device_attribute *attr,
1397                                      char *buf)
1398 {
1399         struct bonding *bond = to_bond(d);
1400         struct list_head *iter;
1401         struct slave *slave;
1402         int res = 0;
1403
1404         if (!rtnl_trylock())
1405                 return restart_syscall();
1406
1407         bond_for_each_slave(bond, slave, iter) {
1408                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1409                         /* not enough space for another interface_name:queue_id pair */
1410                         if ((PAGE_SIZE - res) > 10)
1411                                 res = PAGE_SIZE - 10;
1412                         res += sprintf(buf + res, "++more++ ");
1413                         break;
1414                 }
1415                 res += sprintf(buf + res, "%s:%d ",
1416                                slave->dev->name, slave->queue_id);
1417         }
1418         if (res)
1419                 buf[res-1] = '\n'; /* eat the leftover space */
1420
1421         rtnl_unlock();
1422
1423         return res;
1424 }
1425
1426 /*
1427  * Set the queue_ids of the  slaves in the current bond.  The bond
1428  * interface must be enslaved for this to work.
1429  */
1430 static ssize_t bonding_store_queue_id(struct device *d,
1431                                       struct device_attribute *attr,
1432                                       const char *buffer, size_t count)
1433 {
1434         struct slave *slave, *update_slave;
1435         struct bonding *bond = to_bond(d);
1436         struct list_head *iter;
1437         u16 qid;
1438         int ret = count;
1439         char *delim;
1440         struct net_device *sdev = NULL;
1441
1442         if (!rtnl_trylock())
1443                 return restart_syscall();
1444
1445         /* delim will point to queue id if successful */
1446         delim = strchr(buffer, ':');
1447         if (!delim)
1448                 goto err_no_cmd;
1449
1450         /*
1451          * Terminate string that points to device name and bump it
1452          * up one, so we can read the queue id there.
1453          */
1454         *delim = '\0';
1455         if (sscanf(++delim, "%hd\n", &qid) != 1)
1456                 goto err_no_cmd;
1457
1458         /* Check buffer length, valid ifname and queue id */
1459         if (strlen(buffer) > IFNAMSIZ ||
1460             !dev_valid_name(buffer) ||
1461             qid > bond->dev->real_num_tx_queues)
1462                 goto err_no_cmd;
1463
1464         /* Get the pointer to that interface if it exists */
1465         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1466         if (!sdev)
1467                 goto err_no_cmd;
1468
1469         /* Search for thes slave and check for duplicate qids */
1470         update_slave = NULL;
1471         bond_for_each_slave(bond, slave, iter) {
1472                 if (sdev == slave->dev)
1473                         /*
1474                          * We don't need to check the matching
1475                          * slave for dups, since we're overwriting it
1476                          */
1477                         update_slave = slave;
1478                 else if (qid && qid == slave->queue_id) {
1479                         goto err_no_cmd;
1480                 }
1481         }
1482
1483         if (!update_slave)
1484                 goto err_no_cmd;
1485
1486         /* Actually set the qids for the slave */
1487         update_slave->queue_id = qid;
1488
1489 out:
1490         rtnl_unlock();
1491         return ret;
1492
1493 err_no_cmd:
1494         pr_info("invalid input for queue_id set for %s.\n",
1495                 bond->dev->name);
1496         ret = -EPERM;
1497         goto out;
1498 }
1499
1500 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1501                    bonding_store_queue_id);
1502
1503
1504 /*
1505  * Show and set the all_slaves_active flag.
1506  */
1507 static ssize_t bonding_show_slaves_active(struct device *d,
1508                                           struct device_attribute *attr,
1509                                           char *buf)
1510 {
1511         struct bonding *bond = to_bond(d);
1512
1513         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1514 }
1515
1516 static ssize_t bonding_store_slaves_active(struct device *d,
1517                                            struct device_attribute *attr,
1518                                            const char *buf, size_t count)
1519 {
1520         struct bonding *bond = to_bond(d);
1521         int new_value, ret = count;
1522         struct list_head *iter;
1523         struct slave *slave;
1524
1525         if (!rtnl_trylock())
1526                 return restart_syscall();
1527
1528         if (sscanf(buf, "%d", &new_value) != 1) {
1529                 pr_err("%s: no all_slaves_active value specified.\n",
1530                        bond->dev->name);
1531                 ret = -EINVAL;
1532                 goto out;
1533         }
1534
1535         if (new_value == bond->params.all_slaves_active)
1536                 goto out;
1537
1538         if ((new_value == 0) || (new_value == 1)) {
1539                 bond->params.all_slaves_active = new_value;
1540         } else {
1541                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1542                         bond->dev->name, new_value);
1543                 ret = -EINVAL;
1544                 goto out;
1545         }
1546
1547         bond_for_each_slave(bond, slave, iter) {
1548                 if (!bond_is_active_slave(slave)) {
1549                         if (new_value)
1550                                 slave->inactive = 0;
1551                         else
1552                                 slave->inactive = 1;
1553                 }
1554         }
1555 out:
1556         rtnl_unlock();
1557         return ret;
1558 }
1559 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1560                    bonding_show_slaves_active, bonding_store_slaves_active);
1561
1562 /*
1563  * Show and set the number of IGMP membership reports to send on link failure
1564  */
1565 static ssize_t bonding_show_resend_igmp(struct device *d,
1566                                         struct device_attribute *attr,
1567                                         char *buf)
1568 {
1569         struct bonding *bond = to_bond(d);
1570
1571         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1572 }
1573
1574 static ssize_t bonding_store_resend_igmp(struct device *d,
1575                                          struct device_attribute *attr,
1576                                          const char *buf, size_t count)
1577 {
1578         int new_value, ret = count;
1579         struct bonding *bond = to_bond(d);
1580
1581         if (sscanf(buf, "%d", &new_value) != 1) {
1582                 pr_err("%s: no resend_igmp value specified.\n",
1583                        bond->dev->name);
1584                 ret = -EINVAL;
1585                 goto out;
1586         }
1587
1588         if (new_value < 0 || new_value > 255) {
1589                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1590                        bond->dev->name, new_value);
1591                 ret = -EINVAL;
1592                 goto out;
1593         }
1594
1595         pr_info("%s: Setting resend_igmp to %d.\n",
1596                 bond->dev->name, new_value);
1597         bond->params.resend_igmp = new_value;
1598 out:
1599         return ret;
1600 }
1601
1602 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1603                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1604
1605
1606 static ssize_t bonding_show_lp_interval(struct device *d,
1607                                         struct device_attribute *attr,
1608                                         char *buf)
1609 {
1610         struct bonding *bond = to_bond(d);
1611         return sprintf(buf, "%d\n", bond->params.lp_interval);
1612 }
1613
1614 static ssize_t bonding_store_lp_interval(struct device *d,
1615                                          struct device_attribute *attr,
1616                                          const char *buf, size_t count)
1617 {
1618         struct bonding *bond = to_bond(d);
1619         int new_value, ret = count;
1620
1621         if (sscanf(buf, "%d", &new_value) != 1) {
1622                 pr_err("%s: no lp interval value specified.\n",
1623                         bond->dev->name);
1624                 ret = -EINVAL;
1625                 goto out;
1626         }
1627
1628         if (new_value <= 0) {
1629                 pr_err ("%s: lp_interval must be between 1 and %d\n",
1630                         bond->dev->name, INT_MAX);
1631                 ret = -EINVAL;
1632                 goto out;
1633         }
1634
1635         bond->params.lp_interval = new_value;
1636 out:
1637         return ret;
1638 }
1639
1640 static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
1641                    bonding_show_lp_interval, bonding_store_lp_interval);
1642
1643 static struct attribute *per_bond_attrs[] = {
1644         &dev_attr_slaves.attr,
1645         &dev_attr_mode.attr,
1646         &dev_attr_fail_over_mac.attr,
1647         &dev_attr_arp_validate.attr,
1648         &dev_attr_arp_all_targets.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         &dev_attr_lp_interval.attr,
1674         NULL,
1675 };
1676
1677 static struct attribute_group bonding_group = {
1678         .name = "bonding",
1679         .attrs = per_bond_attrs,
1680 };
1681
1682 /*
1683  * Initialize sysfs.  This sets up the bonding_masters file in
1684  * /sys/class/net.
1685  */
1686 int bond_create_sysfs(struct bond_net *bn)
1687 {
1688         int ret;
1689
1690         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1691         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1692
1693         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1694         /*
1695          * Permit multiple loads of the module by ignoring failures to
1696          * create the bonding_masters sysfs file.  Bonding devices
1697          * created by second or subsequent loads of the module will
1698          * not be listed in, or controllable by, bonding_masters, but
1699          * will have the usual "bonding" sysfs directory.
1700          *
1701          * This is done to preserve backwards compatibility for
1702          * initscripts/sysconfig, which load bonding multiple times to
1703          * configure multiple bonding devices.
1704          */
1705         if (ret == -EEXIST) {
1706                 /* Is someone being kinky and naming a device bonding_master? */
1707                 if (__dev_get_by_name(bn->net,
1708                                       class_attr_bonding_masters.attr.name))
1709                         pr_err("network device named %s already exists in sysfs",
1710                                class_attr_bonding_masters.attr.name);
1711                 ret = 0;
1712         }
1713
1714         return ret;
1715
1716 }
1717
1718 /*
1719  * Remove /sys/class/net/bonding_masters.
1720  */
1721 void bond_destroy_sysfs(struct bond_net *bn)
1722 {
1723         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1724 }
1725
1726 /*
1727  * Initialize sysfs for each bond.  This sets up and registers
1728  * the 'bondctl' directory for each individual bond under /sys/class/net.
1729  */
1730 void bond_prepare_sysfs_group(struct bonding *bond)
1731 {
1732         bond->dev->sysfs_groups[0] = &bonding_group;
1733 }
1734