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, see <http://www.gnu.org/licenses/>.
  16  *
  17  * The full GNU General Public License is included in this distribution in the
  18  * file called LICENSE.
  19  *
  20  */
  21
  22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/device.h>
  27 #include <linux/sched.h>
  28 #include <linux/fs.h>
  29 #include <linux/types.h>
  30 #include <linux/string.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/inetdevice.h>
  33 #include <linux/in.h>
  34 #include <linux/sysfs.h>
  35 #include <linux/ctype.h>
  36 #include <linux/inet.h>
  37 #include <linux/rtnetlink.h>
  38 #include <linux/etherdevice.h>
  39 #include <net/net_namespace.h>
  40 #include <net/netns/generic.h>
  41 #include <linux/nsproxy.h>
  42
  43 #include "bonding.h"
  44
  45 #define to_dev(obj)     container_of(obj, struct device, kobj)
  46 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  47
  48 /*
  49  * "show" function for the bond_masters attribute.
  50  * The class parameter is ignored.
  51  */
  52 static ssize_t bonding_show_bonds(struct class *cls,
  53                                   struct class_attribute *attr,
  54                                   char *buf)
  55 {
  56         struct bond_net *bn =
  57                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  58         int res = 0;
  59         struct bonding *bond;
  60
  61         rtnl_lock();
  62
  63         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  64                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  65                         /* not enough space for another interface name */
  66                         if ((PAGE_SIZE - res) > 10)
  67                                 res = PAGE_SIZE - 10;
  68                         res += sprintf(buf + res, "++more++ ");
  69                         break;
  70                 }
  71                 res += sprintf(buf + res, "%s ", bond->dev->name);
  72         }
  73         if (res)
  74                 buf[res-1] = '\n'; /* eat the leftover space */
  75
  76         rtnl_unlock();
  77         return res;
  78 }
  79
  80 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  81 {
  82         struct bonding *bond;
  83
  84         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  85                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  86                         return bond->dev;
  87         }
  88         return NULL;
  89 }
  90
  91 /*
  92  * "store" function for the bond_masters attribute.  This is what
  93  * creates and deletes entire bonds.
  94  *
  95  * The class parameter is ignored.
  96  *
  97  */
  98
  99 static ssize_t bonding_store_bonds(struct class *cls,
 100                                    struct class_attribute *attr,
 101                                    const char *buffer, size_t count)
 102 {
 103         struct bond_net *bn =
 104                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 105         char command[IFNAMSIZ + 1] = {0, };
 106         char *ifname;
 107         int rv, res = count;
 108
 109         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 110         ifname = command + 1;
 111         if ((strlen(command) <= 1) ||
 112             !dev_valid_name(ifname))
 113                 goto err_no_cmd;
 114
 115         if (command[0] == '+') {
 116                 pr_info("%s is being created...\n", ifname);
 117                 rv = bond_create(bn->net, ifname);
 118                 if (rv) {
 119                         if (rv == -EEXIST)
 120                                 pr_info("%s already exists.\n", ifname);
 121                         else
 122                                 pr_info("%s creation failed.\n", ifname);
 123                         res = rv;
 124                 }
 125         } else if (command[0] == '-') {
 126                 struct net_device *bond_dev;
 127
 128                 rtnl_lock();
 129                 bond_dev = bond_get_by_name(bn, ifname);
 130                 if (bond_dev) {
 131                         pr_info("%s is being deleted...\n", ifname);
 132                         unregister_netdevice(bond_dev);
 133                 } else {
 134                         pr_err("unable to delete non-existent %s\n", ifname);
 135                         res = -ENODEV;
 136                 }
 137                 rtnl_unlock();
 138         } else
 139                 goto err_no_cmd;
 140
 141         /* Always return either count or an error.  If you return 0, you'll
 142          * get called forever, which is bad.
 143          */
 144         return res;
 145
 146 err_no_cmd:
 147         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 148         return -EPERM;
 149 }
 150
 151 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 152 static const struct class_attribute class_attr_bonding_masters = {
 153         .attr = {
 154                 .name = "bonding_masters",
 155                 .mode = S_IWUSR | S_IRUGO,
 156         },
 157         .show = bonding_show_bonds,
 158         .store = bonding_store_bonds,
 159 };
 160
 161 /*
 162  * Show the slaves in the current bond.
 163  */
 164 static ssize_t bonding_show_slaves(struct device *d,
 165                                    struct device_attribute *attr, char *buf)
 166 {
 167         struct bonding *bond = to_bond(d);
 168         struct list_head *iter;
 169         struct slave *slave;
 170         int res = 0;
 171
 172         if (!rtnl_trylock())
 173                 return restart_syscall();
 174
 175         bond_for_each_slave(bond, slave, iter) {
 176                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 177                         /* not enough space for another interface name */
 178                         if ((PAGE_SIZE - res) > 10)
 179                                 res = PAGE_SIZE - 10;
 180                         res += sprintf(buf + res, "++more++ ");
 181                         break;
 182                 }
 183                 res += sprintf(buf + res, "%s ", slave->dev->name);
 184         }
 185
 186         rtnl_unlock();
 187
 188         if (res)
 189                 buf[res-1] = '\n'; /* eat the leftover space */
 190
 191         return res;
 192 }
 193
 194 /*
 195  * Set the slaves in the current bond.
 196  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 197  * All hard work should be done there.
 198  */
 199 static ssize_t bonding_store_slaves(struct device *d,
 200                                     struct device_attribute *attr,
 201                                     const char *buffer, size_t count)
 202 {
 203         char command[IFNAMSIZ + 1] = { 0, };
 204         char *ifname;
 205         int res, ret = count;
 206         struct net_device *dev;
 207         struct bonding *bond = to_bond(d);
 208
 209         if (!rtnl_trylock())
 210                 return restart_syscall();
 211
 212         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 213         ifname = command + 1;
 214         if ((strlen(command) <= 1) ||
 215             !dev_valid_name(ifname))
 216                 goto err_no_cmd;
 217
 218         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 219         if (!dev) {
 220                 pr_info("%s: Interface %s does not exist!\n",
 221                         bond->dev->name, ifname);
 222                 ret = -ENODEV;
 223                 goto out;
 224         }
 225
 226         switch (command[0]) {
 227         case '+':
 228                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 229                 res = bond_enslave(bond->dev, dev);
 230                 break;
 231
 232         case '-':
 233                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 234                 res = bond_release(bond->dev, dev);
 235                 break;
 236
 237         default:
 238                 goto err_no_cmd;
 239         }
 240
 241         if (res)
 242                 ret = res;
 243         goto out;
 244
 245 err_no_cmd:
 246         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 247                bond->dev->name);
 248         ret = -EPERM;
 249
 250 out:
 251         rtnl_unlock();
 252         return ret;
 253 }
 254
 255 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 256                    bonding_store_slaves);
 257
 258 /*
 259  * Show and set the bonding mode.  The bond interface must be down to
 260  * change the mode.
 261  */
 262 static ssize_t bonding_show_mode(struct device *d,
 263                                  struct device_attribute *attr, char *buf)
 264 {
 265         struct bonding *bond = to_bond(d);
 266         struct bond_opt_value *val;
 267
 268         val = bond_opt_get_val(BOND_OPT_MODE, bond->params.mode);
 269
 270         return sprintf(buf, "%s %d\n", val->string, bond->params.mode);
 271 }
 272
 273 static ssize_t bonding_store_mode(struct device *d,
 274                                   struct device_attribute *attr,
 275                                   const char *buf, size_t count)
 276 {
 277         struct bonding *bond = to_bond(d);
 278         int ret;
 279
 280         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_MODE, (char *)buf);
 281         if (!ret)
 282                 ret = count;
 283
 284         return ret;
 285 }
 286 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 287                    bonding_show_mode, bonding_store_mode);
 288
 289 /*
 290  * Show and set the bonding transmit hash method.
 291  */
 292 static ssize_t bonding_show_xmit_hash(struct device *d,
 293                                       struct device_attribute *attr,
 294                                       char *buf)
 295 {
 296         struct bonding *bond = to_bond(d);
 297         struct bond_opt_value *val;
 298
 299         val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
 300
 301         return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
 302 }
 303
 304 static ssize_t bonding_store_xmit_hash(struct device *d,
 305                                        struct device_attribute *attr,
 306                                        const char *buf, size_t count)
 307 {
 308         struct bonding *bond = to_bond(d);
 309         int ret;
 310
 311         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_XMIT_HASH, (char *)buf);
 312         if (!ret)
 313                 ret = count;
 314
 315         return ret;
 316 }
 317 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 318                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 319
 320 /*
 321  * Show and set arp_validate.
 322  */
 323 static ssize_t bonding_show_arp_validate(struct device *d,
 324                                          struct device_attribute *attr,
 325                                          char *buf)
 326 {
 327         struct bonding *bond = to_bond(d);
 328         struct bond_opt_value *val;
 329
 330         val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
 331                                bond->params.arp_validate);
 332
 333         return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
 334 }
 335
 336 static ssize_t bonding_store_arp_validate(struct device *d,
 337                                           struct device_attribute *attr,
 338                                           const char *buf, size_t count)
 339 {
 340         struct bonding *bond = to_bond(d);
 341         int ret;
 342
 343         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_VALIDATE, (char *)buf);
 344         if (!ret)
 345                 ret = count;
 346
 347         return ret;
 348 }
 349
 350 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 351                    bonding_store_arp_validate);
 352 /*
 353  * Show and set arp_all_targets.
 354  */
 355 static ssize_t bonding_show_arp_all_targets(struct device *d,
 356                                          struct device_attribute *attr,
 357                                          char *buf)
 358 {
 359         struct bonding *bond = to_bond(d);
 360         struct bond_opt_value *val;
 361
 362         val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
 363                                bond->params.arp_all_targets);
 364         return sprintf(buf, "%s %d\n",
 365                        val->string, bond->params.arp_all_targets);
 366 }
 367
 368 static ssize_t bonding_store_arp_all_targets(struct device *d,
 369                                           struct device_attribute *attr,
 370                                           const char *buf, size_t count)
 371 {
 372         struct bonding *bond = to_bond(d);
 373         int ret;
 374
 375         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_ALL_TARGETS, (char *)buf);
 376         if (!ret)
 377                 ret = count;
 378
 379         return ret;
 380 }
 381
 382 static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
 383                    bonding_show_arp_all_targets, bonding_store_arp_all_targets);
 384
 385 /*
 386  * Show and store fail_over_mac.  User only allowed to change the
 387  * value when there are no slaves.
 388  */
 389 static ssize_t bonding_show_fail_over_mac(struct device *d,
 390                                           struct device_attribute *attr,
 391                                           char *buf)
 392 {
 393         struct bonding *bond = to_bond(d);
 394         struct bond_opt_value *val;
 395
 396         val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
 397                                bond->params.fail_over_mac);
 398
 399         return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
 400 }
 401
 402 static ssize_t bonding_store_fail_over_mac(struct device *d,
 403                                            struct device_attribute *attr,
 404                                            const char *buf, size_t count)
 405 {
 406         struct bonding *bond = to_bond(d);
 407         int ret;
 408
 409         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_FAIL_OVER_MAC, (char *)buf);
 410         if (!ret)
 411                 ret = count;
 412
 413         return ret;
 414 }
 415
 416 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 417                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 418
 419 /*
 420  * Show and set the arp timer interval.  There are two tricky bits
 421  * here.  First, if ARP monitoring is activated, then we must disable
 422  * MII monitoring.  Second, if the ARP timer isn't running, we must
 423  * start it.
 424  */
 425 static ssize_t bonding_show_arp_interval(struct device *d,
 426                                          struct device_attribute *attr,
 427                                          char *buf)
 428 {
 429         struct bonding *bond = to_bond(d);
 430
 431         return sprintf(buf, "%d\n", bond->params.arp_interval);
 432 }
 433
 434 static ssize_t bonding_store_arp_interval(struct device *d,
 435                                           struct device_attribute *attr,
 436                                           const char *buf, size_t count)
 437 {
 438         struct bonding *bond = to_bond(d);
 439         int ret;
 440
 441         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_INTERVAL, (char *)buf);
 442         if (!ret)
 443                 ret = count;
 444
 445         return ret;
 446 }
 447 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 448                    bonding_show_arp_interval, bonding_store_arp_interval);
 449
 450 /*
 451  * Show and set the arp targets.
 452  */
 453 static ssize_t bonding_show_arp_targets(struct device *d,
 454                                         struct device_attribute *attr,
 455                                         char *buf)
 456 {
 457         struct bonding *bond = to_bond(d);
 458         int i, res = 0;
 459
 460         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 461                 if (bond->params.arp_targets[i])
 462                         res += sprintf(buf + res, "%pI4 ",
 463                                        &bond->params.arp_targets[i]);
 464         }
 465         if (res)
 466                 buf[res-1] = '\n'; /* eat the leftover space */
 467
 468         return res;
 469 }
 470
 471 static ssize_t bonding_store_arp_targets(struct device *d,
 472                                          struct device_attribute *attr,
 473                                          const char *buf, size_t count)
 474 {
 475         struct bonding *bond = to_bond(d);
 476         int ret;
 477
 478         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_TARGETS, (char *)buf);
 479         if (!ret)
 480                 ret = count;
 481
 482         return ret;
 483 }
 484 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 485
 486 /*
 487  * Show and set the up and down delays.  These must be multiples of the
 488  * MII monitoring value, and are stored internally as the multiplier.
 489  * Thus, we must translate to MS for the real world.
 490  */
 491 static ssize_t bonding_show_downdelay(struct device *d,
 492                                       struct device_attribute *attr,
 493                                       char *buf)
 494 {
 495         struct bonding *bond = to_bond(d);
 496
 497         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 498 }
 499
 500 static ssize_t bonding_store_downdelay(struct device *d,
 501                                        struct device_attribute *attr,
 502                                        const char *buf, size_t count)
 503 {
 504         struct bonding *bond = to_bond(d);
 505         int ret;
 506
 507         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_DOWNDELAY, (char *)buf);
 508         if (!ret)
 509                 ret = count;
 510
 511         return ret;
 512 }
 513 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 514                    bonding_show_downdelay, bonding_store_downdelay);
 515
 516 static ssize_t bonding_show_updelay(struct device *d,
 517                                     struct device_attribute *attr,
 518                                     char *buf)
 519 {
 520         struct bonding *bond = to_bond(d);
 521
 522         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 523
 524 }
 525
 526 static ssize_t bonding_store_updelay(struct device *d,
 527                                      struct device_attribute *attr,
 528                                      const char *buf, size_t count)
 529 {
 530         struct bonding *bond = to_bond(d);
 531         int ret;
 532
 533         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_UPDELAY, (char *)buf);
 534         if (!ret)
 535                 ret = count;
 536
 537         return ret;
 538 }
 539 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 540                    bonding_show_updelay, bonding_store_updelay);
 541
 542 /*
 543  * Show and set the LACP interval.  Interface must be down, and the mode
 544  * must be set to 802.3ad mode.
 545  */
 546 static ssize_t bonding_show_lacp(struct device *d,
 547                                  struct device_attribute *attr,
 548                                  char *buf)
 549 {
 550         struct bonding *bond = to_bond(d);
 551         struct bond_opt_value *val;
 552
 553         val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
 554
 555         return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
 556 }
 557
 558 static ssize_t bonding_store_lacp(struct device *d,
 559                                   struct device_attribute *attr,
 560                                   const char *buf, size_t count)
 561 {
 562         struct bonding *bond = to_bond(d);
 563         int ret;
 564
 565         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_LACP_RATE, (char *)buf);
 566         if (!ret)
 567                 ret = count;
 568
 569         return ret;
 570 }
 571 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 572                    bonding_show_lacp, bonding_store_lacp);
 573
 574 static ssize_t bonding_show_min_links(struct device *d,
 575                                       struct device_attribute *attr,
 576                                       char *buf)
 577 {
 578         struct bonding *bond = to_bond(d);
 579
 580         return sprintf(buf, "%d\n", bond->params.min_links);
 581 }
 582
 583 static ssize_t bonding_store_min_links(struct device *d,
 584                                        struct device_attribute *attr,
 585                                        const char *buf, size_t count)
 586 {
 587         struct bonding *bond = to_bond(d);
 588         int ret;
 589
 590         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_MINLINKS, (char *)buf);
 591         if (!ret)
 592                 ret = count;
 593
 594         return ret;
 595 }
 596 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 597                    bonding_show_min_links, bonding_store_min_links);
 598
 599 static ssize_t bonding_show_ad_select(struct device *d,
 600                                       struct device_attribute *attr,
 601                                       char *buf)
 602 {
 603         struct bonding *bond = to_bond(d);
 604         struct bond_opt_value *val;
 605
 606         val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
 607
 608         return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
 609 }
 610
 611
 612 static ssize_t bonding_store_ad_select(struct device *d,
 613                                        struct device_attribute *attr,
 614                                        const char *buf, size_t count)
 615 {
 616         struct bonding *bond = to_bond(d);
 617         int ret;
 618
 619         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_AD_SELECT, (char *)buf);
 620         if (!ret)
 621                 ret = count;
 622
 623         return ret;
 624 }
 625 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 626                    bonding_show_ad_select, bonding_store_ad_select);
 627
 628 /*
 629  * Show and set the number of peer notifications to send after a failover event.
 630  */
 631 static ssize_t bonding_show_num_peer_notif(struct device *d,
 632                                            struct device_attribute *attr,
 633                                            char *buf)
 634 {
 635         struct bonding *bond = to_bond(d);
 636         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 637 }
 638
 639 static ssize_t bonding_store_num_peer_notif(struct device *d,
 640                                             struct device_attribute *attr,
 641                                             const char *buf, size_t count)
 642 {
 643         struct bonding *bond = to_bond(d);
 644         int ret;
 645
 646         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_NUM_PEER_NOTIF, (char *)buf);
 647         if (!ret)
 648                 ret = count;
 649
 650         return ret;
 651 }
 652 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 653                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 654 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 655                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 656
 657 /*
 658  * Show and set the MII monitor interval.  There are two tricky bits
 659  * here.  First, if MII monitoring is activated, then we must disable
 660  * ARP monitoring.  Second, if the timer isn't running, we must
 661  * start it.
 662  */
 663 static ssize_t bonding_show_miimon(struct device *d,
 664                                    struct device_attribute *attr,
 665                                    char *buf)
 666 {
 667         struct bonding *bond = to_bond(d);
 668
 669         return sprintf(buf, "%d\n", bond->params.miimon);
 670 }
 671
 672 static ssize_t bonding_store_miimon(struct device *d,
 673                                     struct device_attribute *attr,
 674                                     const char *buf, size_t count)
 675 {
 676         int new_value, ret;
 677         struct bonding *bond = to_bond(d);
 678
 679         if (sscanf(buf, "%d", &new_value) != 1) {
 680                 pr_err("%s: no miimon value specified.\n",
 681                        bond->dev->name);
 682                 return -EINVAL;
 683         }
 684
 685         if (!rtnl_trylock())
 686                 return restart_syscall();
 687
 688         ret = bond_option_miimon_set(bond, new_value);
 689         if (!ret)
 690                 ret = count;
 691
 692         rtnl_unlock();
 693         return ret;
 694 }
 695 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 696                    bonding_show_miimon, bonding_store_miimon);
 697
 698 /*
 699  * Show and set the primary slave.  The store function is much
 700  * simpler than bonding_store_slaves function because it only needs to
 701  * handle one interface name.
 702  * The bond must be a mode that supports a primary for this be
 703  * set.
 704  */
 705 static ssize_t bonding_show_primary(struct device *d,
 706                                     struct device_attribute *attr,
 707                                     char *buf)
 708 {
 709         int count = 0;
 710         struct bonding *bond = to_bond(d);
 711
 712         if (bond->primary_slave)
 713                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
 714
 715         return count;
 716 }
 717
 718 static ssize_t bonding_store_primary(struct device *d,
 719                                      struct device_attribute *attr,
 720                                      const char *buf, size_t count)
 721 {
 722         struct bonding *bond = to_bond(d);
 723         char ifname[IFNAMSIZ];
 724         int ret;
 725
 726         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
 727         if (ifname[0] == '\n')
 728                 ifname[0] = '\0';
 729
 730         if (!rtnl_trylock())
 731                 return restart_syscall();
 732
 733         ret = bond_option_primary_set(bond, ifname);
 734         if (!ret)
 735                 ret = count;
 736
 737         rtnl_unlock();
 738         return ret;
 739 }
 740 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
 741                    bonding_show_primary, bonding_store_primary);
 742
 743 /*
 744  * Show and set the primary_reselect flag.
 745  */
 746 static ssize_t bonding_show_primary_reselect(struct device *d,
 747                                              struct device_attribute *attr,
 748                                              char *buf)
 749 {
 750         struct bonding *bond = to_bond(d);
 751
 752         return sprintf(buf, "%s %d\n",
 753                        pri_reselect_tbl[bond->params.primary_reselect].modename,
 754                        bond->params.primary_reselect);
 755 }
 756
 757 static ssize_t bonding_store_primary_reselect(struct device *d,
 758                                               struct device_attribute *attr,
 759                                               const char *buf, size_t count)
 760 {
 761         int new_value, ret;
 762         struct bonding *bond = to_bond(d);
 763
 764         new_value = bond_parse_parm(buf, pri_reselect_tbl);
 765         if (new_value < 0)  {
 766                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
 767                        bond->dev->name,
 768                        (int) strlen(buf) - 1, buf);
 769                 return -EINVAL;
 770         }
 771
 772         if (!rtnl_trylock())
 773                 return restart_syscall();
 774
 775         ret = bond_option_primary_reselect_set(bond, new_value);
 776         if (!ret)
 777                 ret = count;
 778
 779         rtnl_unlock();
 780         return ret;
 781 }
 782 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
 783                    bonding_show_primary_reselect,
 784                    bonding_store_primary_reselect);
 785
 786 /*
 787  * Show and set the use_carrier flag.
 788  */
 789 static ssize_t bonding_show_carrier(struct device *d,
 790                                     struct device_attribute *attr,
 791                                     char *buf)
 792 {
 793         struct bonding *bond = to_bond(d);
 794
 795         return sprintf(buf, "%d\n", bond->params.use_carrier);
 796 }
 797
 798 static ssize_t bonding_store_carrier(struct device *d,
 799                                      struct device_attribute *attr,
 800                                      const char *buf, size_t count)
 801 {
 802         int new_value, ret;
 803         struct bonding *bond = to_bond(d);
 804
 805         if (sscanf(buf, "%d", &new_value) != 1) {
 806                 pr_err("%s: no use_carrier value specified.\n",
 807                        bond->dev->name);
 808                 return -EINVAL;
 809         }
 810
 811         if (!rtnl_trylock())
 812                 return restart_syscall();
 813
 814         ret = bond_option_use_carrier_set(bond, new_value);
 815         if (!ret)
 816                 ret = count;
 817
 818         rtnl_unlock();
 819         return ret;
 820 }
 821 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
 822                    bonding_show_carrier, bonding_store_carrier);
 823
 824
 825 /*
 826  * Show and set currently active_slave.
 827  */
 828 static ssize_t bonding_show_active_slave(struct device *d,
 829                                          struct device_attribute *attr,
 830                                          char *buf)
 831 {
 832         struct bonding *bond = to_bond(d);
 833         struct net_device *slave_dev;
 834         int count = 0;
 835
 836         rcu_read_lock();
 837         slave_dev = bond_option_active_slave_get_rcu(bond);
 838         if (slave_dev)
 839                 count = sprintf(buf, "%s\n", slave_dev->name);
 840         rcu_read_unlock();
 841
 842         return count;
 843 }
 844
 845 static ssize_t bonding_store_active_slave(struct device *d,
 846                                           struct device_attribute *attr,
 847                                           const char *buf, size_t count)
 848 {
 849         int ret;
 850         struct bonding *bond = to_bond(d);
 851         char ifname[IFNAMSIZ];
 852         struct net_device *dev;
 853
 854         if (!rtnl_trylock())
 855                 return restart_syscall();
 856
 857         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
 858         if (!strlen(ifname) || buf[0] == '\n') {
 859                 dev = NULL;
 860         } else {
 861                 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 862                 if (!dev) {
 863                         ret = -ENODEV;
 864                         goto out;
 865                 }
 866         }
 867
 868         ret = bond_option_active_slave_set(bond, dev);
 869         if (!ret)
 870                 ret = count;
 871
 872  out:
 873         rtnl_unlock();
 874
 875         return ret;
 876
 877 }
 878 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
 879                    bonding_show_active_slave, bonding_store_active_slave);
 880
 881
 882 /*
 883  * Show link status of the bond interface.
 884  */
 885 static ssize_t bonding_show_mii_status(struct device *d,
 886                                        struct device_attribute *attr,
 887                                        char *buf)
 888 {
 889         struct bonding *bond = to_bond(d);
 890
 891         return sprintf(buf, "%s\n", bond->curr_active_slave ? "up" : "down");
 892 }
 893 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
 894
 895 /*
 896  * Show current 802.3ad aggregator ID.
 897  */
 898 static ssize_t bonding_show_ad_aggregator(struct device *d,
 899                                           struct device_attribute *attr,
 900                                           char *buf)
 901 {
 902         int count = 0;
 903         struct bonding *bond = to_bond(d);
 904
 905         if (bond->params.mode == BOND_MODE_8023AD) {
 906                 struct ad_info ad_info;
 907                 count = sprintf(buf, "%d\n",
 908                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 909                                 ?  0 : ad_info.aggregator_id);
 910         }
 911
 912         return count;
 913 }
 914 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
 915
 916
 917 /*
 918  * Show number of active 802.3ad ports.
 919  */
 920 static ssize_t bonding_show_ad_num_ports(struct device *d,
 921                                          struct device_attribute *attr,
 922                                          char *buf)
 923 {
 924         int count = 0;
 925         struct bonding *bond = to_bond(d);
 926
 927         if (bond->params.mode == BOND_MODE_8023AD) {
 928                 struct ad_info ad_info;
 929                 count = sprintf(buf, "%d\n",
 930                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 931                                 ?  0 : ad_info.ports);
 932         }
 933
 934         return count;
 935 }
 936 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
 937
 938
 939 /*
 940  * Show current 802.3ad actor key.
 941  */
 942 static ssize_t bonding_show_ad_actor_key(struct device *d,
 943                                          struct device_attribute *attr,
 944                                          char *buf)
 945 {
 946         int count = 0;
 947         struct bonding *bond = to_bond(d);
 948
 949         if (bond->params.mode == BOND_MODE_8023AD) {
 950                 struct ad_info ad_info;
 951                 count = sprintf(buf, "%d\n",
 952                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 953                                 ?  0 : ad_info.actor_key);
 954         }
 955
 956         return count;
 957 }
 958 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
 959
 960
 961 /*
 962  * Show current 802.3ad partner key.
 963  */
 964 static ssize_t bonding_show_ad_partner_key(struct device *d,
 965                                            struct device_attribute *attr,
 966                                            char *buf)
 967 {
 968         int count = 0;
 969         struct bonding *bond = to_bond(d);
 970
 971         if (bond->params.mode == BOND_MODE_8023AD) {
 972                 struct ad_info ad_info;
 973                 count = sprintf(buf, "%d\n",
 974                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 975                                 ?  0 : ad_info.partner_key);
 976         }
 977
 978         return count;
 979 }
 980 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
 981
 982
 983 /*
 984  * Show current 802.3ad partner mac.
 985  */
 986 static ssize_t bonding_show_ad_partner_mac(struct device *d,
 987                                            struct device_attribute *attr,
 988                                            char *buf)
 989 {
 990         int count = 0;
 991         struct bonding *bond = to_bond(d);
 992
 993         if (bond->params.mode == BOND_MODE_8023AD) {
 994                 struct ad_info ad_info;
 995                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
 996                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
 997         }
 998
 999         return count;
1000 }
1001 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1002
1003 /*
1004  * Show the queue_ids of the slaves in the current bond.
1005  */
1006 static ssize_t bonding_show_queue_id(struct device *d,
1007                                      struct device_attribute *attr,
1008                                      char *buf)
1009 {
1010         struct bonding *bond = to_bond(d);
1011         struct list_head *iter;
1012         struct slave *slave;
1013         int res = 0;
1014
1015         if (!rtnl_trylock())
1016                 return restart_syscall();
1017
1018         bond_for_each_slave(bond, slave, iter) {
1019                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1020                         /* not enough space for another interface_name:queue_id pair */
1021                         if ((PAGE_SIZE - res) > 10)
1022                                 res = PAGE_SIZE - 10;
1023                         res += sprintf(buf + res, "++more++ ");
1024                         break;
1025                 }
1026                 res += sprintf(buf + res, "%s:%d ",
1027                                slave->dev->name, slave->queue_id);
1028         }
1029         if (res)
1030                 buf[res-1] = '\n'; /* eat the leftover space */
1031
1032         rtnl_unlock();
1033
1034         return res;
1035 }
1036
1037 /*
1038  * Set the queue_ids of the  slaves in the current bond.  The bond
1039  * interface must be enslaved for this to work.
1040  */
1041 static ssize_t bonding_store_queue_id(struct device *d,
1042                                       struct device_attribute *attr,
1043                                       const char *buffer, size_t count)
1044 {
1045         struct slave *slave, *update_slave;
1046         struct bonding *bond = to_bond(d);
1047         struct list_head *iter;
1048         u16 qid;
1049         int ret = count;
1050         char *delim;
1051         struct net_device *sdev = NULL;
1052
1053         if (!rtnl_trylock())
1054                 return restart_syscall();
1055
1056         /* delim will point to queue id if successful */
1057         delim = strchr(buffer, ':');
1058         if (!delim)
1059                 goto err_no_cmd;
1060
1061         /*
1062          * Terminate string that points to device name and bump it
1063          * up one, so we can read the queue id there.
1064          */
1065         *delim = '\0';
1066         if (sscanf(++delim, "%hd\n", &qid) != 1)
1067                 goto err_no_cmd;
1068
1069         /* Check buffer length, valid ifname and queue id */
1070         if (strlen(buffer) > IFNAMSIZ ||
1071             !dev_valid_name(buffer) ||
1072             qid > bond->dev->real_num_tx_queues)
1073                 goto err_no_cmd;
1074
1075         /* Get the pointer to that interface if it exists */
1076         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1077         if (!sdev)
1078                 goto err_no_cmd;
1079
1080         /* Search for thes slave and check for duplicate qids */
1081         update_slave = NULL;
1082         bond_for_each_slave(bond, slave, iter) {
1083                 if (sdev == slave->dev)
1084                         /*
1085                          * We don't need to check the matching
1086                          * slave for dups, since we're overwriting it
1087                          */
1088                         update_slave = slave;
1089                 else if (qid && qid == slave->queue_id) {
1090                         goto err_no_cmd;
1091                 }
1092         }
1093
1094         if (!update_slave)
1095                 goto err_no_cmd;
1096
1097         /* Actually set the qids for the slave */
1098         update_slave->queue_id = qid;
1099
1100 out:
1101         rtnl_unlock();
1102         return ret;
1103
1104 err_no_cmd:
1105         pr_info("invalid input for queue_id set for %s.\n",
1106                 bond->dev->name);
1107         ret = -EPERM;
1108         goto out;
1109 }
1110
1111 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1112                    bonding_store_queue_id);
1113
1114
1115 /*
1116  * Show and set the all_slaves_active flag.
1117  */
1118 static ssize_t bonding_show_slaves_active(struct device *d,
1119                                           struct device_attribute *attr,
1120                                           char *buf)
1121 {
1122         struct bonding *bond = to_bond(d);
1123
1124         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1125 }
1126
1127 static ssize_t bonding_store_slaves_active(struct device *d,
1128                                            struct device_attribute *attr,
1129                                            const char *buf, size_t count)
1130 {
1131         struct bonding *bond = to_bond(d);
1132         int new_value, ret;
1133
1134         if (sscanf(buf, "%d", &new_value) != 1) {
1135                 pr_err("%s: no all_slaves_active value specified.\n",
1136                        bond->dev->name);
1137                 return -EINVAL;
1138         }
1139
1140         if (!rtnl_trylock())
1141                 return restart_syscall();
1142
1143         ret = bond_option_all_slaves_active_set(bond, new_value);
1144         if (!ret)
1145                 ret = count;
1146
1147         rtnl_unlock();
1148         return ret;
1149 }
1150 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1151                    bonding_show_slaves_active, bonding_store_slaves_active);
1152
1153 /*
1154  * Show and set the number of IGMP membership reports to send on link failure
1155  */
1156 static ssize_t bonding_show_resend_igmp(struct device *d,
1157                                         struct device_attribute *attr,
1158                                         char *buf)
1159 {
1160         struct bonding *bond = to_bond(d);
1161
1162         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1163 }
1164
1165 static ssize_t bonding_store_resend_igmp(struct device *d,
1166                                          struct device_attribute *attr,
1167                                          const char *buf, size_t count)
1168 {
1169         int new_value, ret = count;
1170         struct bonding *bond = to_bond(d);
1171
1172         if (sscanf(buf, "%d", &new_value) != 1) {
1173                 pr_err("%s: no resend_igmp value specified.\n",
1174                        bond->dev->name);
1175                 return -EINVAL;
1176         }
1177
1178         if (!rtnl_trylock())
1179                 return restart_syscall();
1180
1181         ret = bond_option_resend_igmp_set(bond, new_value);
1182         if (!ret)
1183                 ret = count;
1184
1185         rtnl_unlock();
1186         return ret;
1187 }
1188
1189 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1190                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1191
1192
1193 static ssize_t bonding_show_lp_interval(struct device *d,
1194                                         struct device_attribute *attr,
1195                                         char *buf)
1196 {
1197         struct bonding *bond = to_bond(d);
1198         return sprintf(buf, "%d\n", bond->params.lp_interval);
1199 }
1200
1201 static ssize_t bonding_store_lp_interval(struct device *d,
1202                                          struct device_attribute *attr,
1203                                          const char *buf, size_t count)
1204 {
1205         struct bonding *bond = to_bond(d);
1206         int new_value, ret;
1207
1208         if (sscanf(buf, "%d", &new_value) != 1) {
1209                 pr_err("%s: no lp interval value specified.\n",
1210                         bond->dev->name);
1211                 return -EINVAL;
1212         }
1213
1214         if (!rtnl_trylock())
1215                 return restart_syscall();
1216
1217         ret = bond_option_lp_interval_set(bond, new_value);
1218         if (!ret)
1219                 ret = count;
1220
1221         rtnl_unlock();
1222         return ret;
1223 }
1224
1225 static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
1226                    bonding_show_lp_interval, bonding_store_lp_interval);
1227
1228 static ssize_t bonding_show_packets_per_slave(struct device *d,
1229                                               struct device_attribute *attr,
1230                                               char *buf)
1231 {
1232         struct bonding *bond = to_bond(d);
1233         unsigned int packets_per_slave = bond->params.packets_per_slave;
1234         return sprintf(buf, "%u\n", packets_per_slave);
1235 }
1236
1237 static ssize_t bonding_store_packets_per_slave(struct device *d,
1238                                                struct device_attribute *attr,
1239                                                const char *buf, size_t count)
1240 {
1241         struct bonding *bond = to_bond(d);
1242         int ret;
1243
1244         ret = bond_opt_tryset_rtnl(bond, BOND_OPT_PACKETS_PER_SLAVE,
1245                                    (char *)buf);
1246         if (!ret)
1247                 ret = count;
1248
1249         return ret;
1250 }
1251
1252 static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
1253                    bonding_show_packets_per_slave,
1254                    bonding_store_packets_per_slave);
1255
1256 static struct attribute *per_bond_attrs[] = {
1257         &dev_attr_slaves.attr,
1258         &dev_attr_mode.attr,
1259         &dev_attr_fail_over_mac.attr,
1260         &dev_attr_arp_validate.attr,
1261         &dev_attr_arp_all_targets.attr,
1262         &dev_attr_arp_interval.attr,
1263         &dev_attr_arp_ip_target.attr,
1264         &dev_attr_downdelay.attr,
1265         &dev_attr_updelay.attr,
1266         &dev_attr_lacp_rate.attr,
1267         &dev_attr_ad_select.attr,
1268         &dev_attr_xmit_hash_policy.attr,
1269         &dev_attr_num_grat_arp.attr,
1270         &dev_attr_num_unsol_na.attr,
1271         &dev_attr_miimon.attr,
1272         &dev_attr_primary.attr,
1273         &dev_attr_primary_reselect.attr,
1274         &dev_attr_use_carrier.attr,
1275         &dev_attr_active_slave.attr,
1276         &dev_attr_mii_status.attr,
1277         &dev_attr_ad_aggregator.attr,
1278         &dev_attr_ad_num_ports.attr,
1279         &dev_attr_ad_actor_key.attr,
1280         &dev_attr_ad_partner_key.attr,
1281         &dev_attr_ad_partner_mac.attr,
1282         &dev_attr_queue_id.attr,
1283         &dev_attr_all_slaves_active.attr,
1284         &dev_attr_resend_igmp.attr,
1285         &dev_attr_min_links.attr,
1286         &dev_attr_lp_interval.attr,
1287         &dev_attr_packets_per_slave.attr,
1288         NULL,
1289 };
1290
1291 static struct attribute_group bonding_group = {
1292         .name = "bonding",
1293         .attrs = per_bond_attrs,
1294 };
1295
1296 /*
1297  * Initialize sysfs.  This sets up the bonding_masters file in
1298  * /sys/class/net.
1299  */
1300 int bond_create_sysfs(struct bond_net *bn)
1301 {
1302         int ret;
1303
1304         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1305         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1306
1307         ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
1308                                           bn->net);
1309         /*
1310          * Permit multiple loads of the module by ignoring failures to
1311          * create the bonding_masters sysfs file.  Bonding devices
1312          * created by second or subsequent loads of the module will
1313          * not be listed in, or controllable by, bonding_masters, but
1314          * will have the usual "bonding" sysfs directory.
1315          *
1316          * This is done to preserve backwards compatibility for
1317          * initscripts/sysconfig, which load bonding multiple times to
1318          * configure multiple bonding devices.
1319          */
1320         if (ret == -EEXIST) {
1321                 /* Is someone being kinky and naming a device bonding_master? */
1322                 if (__dev_get_by_name(bn->net,
1323                                       class_attr_bonding_masters.attr.name))
1324                         pr_err("network device named %s already exists in sysfs",
1325                                class_attr_bonding_masters.attr.name);
1326                 ret = 0;
1327         }
1328
1329         return ret;
1330
1331 }
1332
1333 /*
1334  * Remove /sys/class/net/bonding_masters.
1335  */
1336 void bond_destroy_sysfs(struct bond_net *bn)
1337 {
1338         netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
1339 }
1340
1341 /*
1342  * Initialize sysfs for each bond.  This sets up and registers
1343  * the 'bondctl' directory for each individual bond under /sys/class/net.
1344  */
1345 void bond_prepare_sysfs_group(struct bonding *bond)
1346 {
1347         bond->dev->sysfs_groups[0] = &bonding_group;
1348 }
1349