Pileus Git - ~andy/linux/blob - drivers/net/bonding/bond_options.c

   1 /*
   2  * drivers/net/bond/bond_options.c - bonding options
   3  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   4  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/errno.h>
  15 #include <linux/if.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/rwlock.h>
  18 #include <linux/rcupdate.h>
  19 #include <linux/ctype.h>
  20 #include <linux/inet.h>
  21 #include "bonding.h"
  22
  23 static struct bond_opt_value bond_mode_tbl[] = {
  24         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  25         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  26         { "balance-xor",   BOND_MODE_XOR,          0},
  27         { "broadcast",     BOND_MODE_BROADCAST,    0},
  28         { "802.3ad",       BOND_MODE_8023AD,       0},
  29         { "balance-tlb",   BOND_MODE_TLB,          0},
  30         { "balance-alb",   BOND_MODE_ALB,          0},
  31         { NULL,            -1,                     0},
  32 };
  33
  34 static struct bond_opt_value bond_pps_tbl[] = {
  35         { "default", 1,         BOND_VALFLAG_DEFAULT},
  36         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  37         { NULL,      -1,        0},
  38 };
  39
  40 static struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  41         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
  42         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
  43         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
  44         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
  45         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
  46         { NULL,       -1,                       0},
  47 };
  48
  49 static struct bond_opt_value bond_arp_validate_tbl[] = {
  50         { "none",   BOND_ARP_VALIDATE_NONE,   BOND_VALFLAG_DEFAULT},
  51         { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
  52         { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
  53         { "all",    BOND_ARP_VALIDATE_ALL,    0},
  54         { NULL,     -1,                       0},
  55 };
  56
  57 static struct bond_opt_value bond_arp_all_targets_tbl[] = {
  58         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
  59         { "all", BOND_ARP_TARGETS_ALL, 0},
  60         { NULL,  -1,                   0},
  61 };
  62
  63 static struct bond_opt_value bond_fail_over_mac_tbl[] = {
  64         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
  65         { "active", BOND_FOM_ACTIVE, 0},
  66         { "follow", BOND_FOM_FOLLOW, 0},
  67         { NULL,     -1,              0},
  68 };
  69
  70 static struct bond_opt_value bond_intmax_tbl[] = {
  71         { "off",     0,       BOND_VALFLAG_DEFAULT},
  72         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
  73 };
  74
  75 static struct bond_opt_value bond_lacp_rate_tbl[] = {
  76         { "slow", AD_LACP_SLOW, 0},
  77         { "fast", AD_LACP_FAST, 0},
  78         { NULL,   -1,           0},
  79 };
  80
  81 static struct bond_opt_value bond_ad_select_tbl[] = {
  82         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
  83         { "bandwidth", BOND_AD_BANDWIDTH, 0},
  84         { "count",     BOND_AD_COUNT,     0},
  85         { NULL,        -1,                0},
  86 };
  87
  88 static struct bond_opt_value bond_num_peer_notif_tbl[] = {
  89         { "off",     0,   0},
  90         { "maxval",  255, BOND_VALFLAG_MAX},
  91         { "default", 1,   BOND_VALFLAG_DEFAULT},
  92         { NULL,      -1,  0}
  93 };
  94
  95 static struct bond_option bond_opts[] = {
  96         [BOND_OPT_MODE] = {
  97                 .id = BOND_OPT_MODE,
  98                 .name = "mode",
  99                 .desc = "bond device mode",
 100                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 101                 .values = bond_mode_tbl,
 102                 .set = bond_option_mode_set
 103         },
 104         [BOND_OPT_PACKETS_PER_SLAVE] = {
 105                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 106                 .name = "packets_per_slave",
 107                 .desc = "Packets to send per slave in RR mode",
 108                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 109                 .values = bond_pps_tbl,
 110                 .set = bond_option_pps_set
 111         },
 112         [BOND_OPT_XMIT_HASH] = {
 113                 .id = BOND_OPT_XMIT_HASH,
 114                 .name = "xmit_hash_policy",
 115                 .desc = "balance-xor and 802.3ad hashing method",
 116                 .values = bond_xmit_hashtype_tbl,
 117                 .set = bond_option_xmit_hash_policy_set
 118         },
 119         [BOND_OPT_ARP_VALIDATE] = {
 120                 .id = BOND_OPT_ARP_VALIDATE,
 121                 .name = "arp_validate",
 122                 .desc = "validate src/dst of ARP probes",
 123                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP)),
 124                 .values = bond_arp_validate_tbl,
 125                 .set = bond_option_arp_validate_set
 126         },
 127         [BOND_OPT_ARP_ALL_TARGETS] = {
 128                 .id = BOND_OPT_ARP_ALL_TARGETS,
 129                 .name = "arp_all_targets",
 130                 .desc = "fail on any/all arp targets timeout",
 131                 .values = bond_arp_all_targets_tbl,
 132                 .set = bond_option_arp_all_targets_set
 133         },
 134         [BOND_OPT_FAIL_OVER_MAC] = {
 135                 .id = BOND_OPT_FAIL_OVER_MAC,
 136                 .name = "fail_over_mac",
 137                 .desc = "For active-backup, do not set all slaves to the same MAC",
 138                 .flags = BOND_OPTFLAG_NOSLAVES,
 139                 .values = bond_fail_over_mac_tbl,
 140                 .set = bond_option_fail_over_mac_set
 141         },
 142         [BOND_OPT_ARP_INTERVAL] = {
 143                 .id = BOND_OPT_ARP_INTERVAL,
 144                 .name = "arp_interval",
 145                 .desc = "arp interval in milliseconds",
 146                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 147                                BIT(BOND_MODE_ALB),
 148                 .values = bond_intmax_tbl,
 149                 .set = bond_option_arp_interval_set
 150         },
 151         [BOND_OPT_ARP_TARGETS] = {
 152                 .id = BOND_OPT_ARP_TARGETS,
 153                 .name = "arp_ip_target",
 154                 .desc = "arp targets in n.n.n.n form",
 155                 .flags = BOND_OPTFLAG_RAWVAL,
 156                 .set = bond_option_arp_ip_targets_set
 157         },
 158         [BOND_OPT_DOWNDELAY] = {
 159                 .id = BOND_OPT_DOWNDELAY,
 160                 .name = "downdelay",
 161                 .desc = "Delay before considering link down, in milliseconds",
 162                 .values = bond_intmax_tbl,
 163                 .set = bond_option_downdelay_set
 164         },
 165         [BOND_OPT_UPDELAY] = {
 166                 .id = BOND_OPT_UPDELAY,
 167                 .name = "updelay",
 168                 .desc = "Delay before considering link up, in milliseconds",
 169                 .values = bond_intmax_tbl,
 170                 .set = bond_option_updelay_set
 171         },
 172         [BOND_OPT_LACP_RATE] = {
 173                 .id = BOND_OPT_LACP_RATE,
 174                 .name = "lacp_rate",
 175                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 176                 .flags = BOND_OPTFLAG_IFDOWN,
 177                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 178                 .values = bond_lacp_rate_tbl,
 179                 .set = bond_option_lacp_rate_set
 180         },
 181         [BOND_OPT_MINLINKS] = {
 182                 .id = BOND_OPT_MINLINKS,
 183                 .name = "min_links",
 184                 .desc = "Minimum number of available links before turning on carrier",
 185                 .values = bond_intmax_tbl,
 186                 .set = bond_option_min_links_set
 187         },
 188         [BOND_OPT_AD_SELECT] = {
 189                 .id = BOND_OPT_AD_SELECT,
 190                 .name = "ad_select",
 191                 .desc = "803.ad aggregation selection logic",
 192                 .flags = BOND_OPTFLAG_IFDOWN,
 193                 .values = bond_ad_select_tbl,
 194                 .set = bond_option_ad_select_set
 195         },
 196         [BOND_OPT_NUM_PEER_NOTIF] = {
 197                 .id = BOND_OPT_NUM_PEER_NOTIF,
 198                 .name = "num_unsol_na",
 199                 .desc = "Number of peer notifications to send on failover event",
 200                 .values = bond_num_peer_notif_tbl,
 201                 .set = bond_option_num_peer_notif_set
 202         },
 203         [BOND_OPT_MIIMON] = {
 204                 .id = BOND_OPT_MIIMON,
 205                 .name = "miimon",
 206                 .desc = "Link check interval in milliseconds",
 207                 .values = bond_intmax_tbl,
 208                 .set = bond_option_miimon_set
 209         },
 210         [BOND_OPT_PRIMARY] = {
 211                 .id = BOND_OPT_PRIMARY,
 212                 .name = "primary",
 213                 .desc = "Primary network device to use",
 214                 .flags = BOND_OPTFLAG_RAWVAL,
 215                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 216                                                 BIT(BOND_MODE_TLB) |
 217                                                 BIT(BOND_MODE_ALB)),
 218                 .set = bond_option_primary_set
 219         },
 220         { }
 221 };
 222
 223 /* Searches for a value in opt's values[] table */
 224 struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 225 {
 226         struct bond_option *opt;
 227         int i;
 228
 229         opt = bond_opt_get(option);
 230         if (WARN_ON(!opt))
 231                 return NULL;
 232         for (i = 0; opt->values && opt->values[i].string; i++)
 233                 if (opt->values[i].value == val)
 234                         return &opt->values[i];
 235
 236         return NULL;
 237 }
 238
 239 /* Searches for a value in opt's values[] table which matches the flagmask */
 240 static struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 241                                                  u32 flagmask)
 242 {
 243         int i;
 244
 245         for (i = 0; opt->values && opt->values[i].string; i++)
 246                 if (opt->values[i].flags & flagmask)
 247                         return &opt->values[i];
 248
 249         return NULL;
 250 }
 251
 252 /* If maxval is missing then there's no range to check. In case minval is
 253  * missing then it's considered to be 0.
 254  */
 255 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 256 {
 257         struct bond_opt_value *minval, *maxval;
 258
 259         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 260         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 261         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 262                 return false;
 263
 264         return true;
 265 }
 266
 267 /**
 268  * bond_opt_parse - parse option value
 269  * @opt: the option to parse against
 270  * @val: value to parse
 271  *
 272  * This function tries to extract the value from @val and check if it's
 273  * a possible match for the option and returns NULL if a match isn't found,
 274  * or the struct_opt_value that matched. It also strips the new line from
 275  * @val->string if it's present.
 276  */
 277 struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 278                                       struct bond_opt_value *val)
 279 {
 280         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 281         struct bond_opt_value *tbl, *ret = NULL;
 282         bool checkval;
 283         int i, rv;
 284
 285         /* No parsing if the option wants a raw val */
 286         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 287                 return val;
 288
 289         tbl = opt->values;
 290         if (!tbl)
 291                 goto out;
 292
 293         /* ULLONG_MAX is used to bypass string processing */
 294         checkval = val->value != ULLONG_MAX;
 295         if (!checkval) {
 296                 if (!val->string)
 297                         goto out;
 298                 p = strchr(val->string, '\n');
 299                 if (p)
 300                         *p = '\0';
 301                 for (p = val->string; *p; p++)
 302                         if (!(isdigit(*p) || isspace(*p)))
 303                                 break;
 304                 /* The following code extracts the string to match or the value
 305                  * and sets checkval appropriately
 306                  */
 307                 if (*p) {
 308                         rv = sscanf(val->string, "%32s", valstr);
 309                 } else {
 310                         rv = sscanf(val->string, "%llu", &val->value);
 311                         checkval = true;
 312                 }
 313                 if (!rv)
 314                         goto out;
 315         }
 316
 317         for (i = 0; tbl[i].string; i++) {
 318                 /* Check for exact match */
 319                 if (checkval) {
 320                         if (val->value == tbl[i].value)
 321                                 ret = &tbl[i];
 322                 } else {
 323                         if (!strcmp(valstr, "default") &&
 324                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 325                                 ret = &tbl[i];
 326
 327                         if (!strcmp(valstr, tbl[i].string))
 328                                 ret = &tbl[i];
 329                 }
 330                 /* Found an exact match */
 331                 if (ret)
 332                         goto out;
 333         }
 334         /* Possible range match */
 335         if (checkval && bond_opt_check_range(opt, val->value))
 336                 ret = val;
 337 out:
 338         return ret;
 339 }
 340
 341 /* Check opt's dependencies against bond mode and currently set options */
 342 static int bond_opt_check_deps(struct bonding *bond,
 343                                const struct bond_option *opt)
 344 {
 345         struct bond_params *params = &bond->params;
 346
 347         if (test_bit(params->mode, &opt->unsuppmodes))
 348                 return -EACCES;
 349         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 350                 return -ENOTEMPTY;
 351         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 352                 return -EBUSY;
 353
 354         return 0;
 355 }
 356
 357 static void bond_opt_dep_print(struct bonding *bond,
 358                                const struct bond_option *opt)
 359 {
 360         struct bond_opt_value *modeval;
 361         struct bond_params *params;
 362
 363         params = &bond->params;
 364         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 365         if (test_bit(params->mode, &opt->unsuppmodes))
 366                 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 367                        bond->dev->name, opt->name,
 368                        modeval->string, modeval->value);
 369 }
 370
 371 static void bond_opt_error_interpret(struct bonding *bond,
 372                                      const struct bond_option *opt,
 373                                      int error, struct bond_opt_value *val)
 374 {
 375         struct bond_opt_value *minval, *maxval;
 376         char *p;
 377
 378         switch (error) {
 379         case -EINVAL:
 380                 if (val) {
 381                         if (val->string) {
 382                                 /* sometimes RAWVAL opts may have new lines */
 383                                 p = strchr(val->string, '\n');
 384                                 if (p)
 385                                         *p = '\0';
 386                                 pr_err("%s: option %s: invalid value (%s).\n",
 387                                        bond->dev->name, opt->name, val->string);
 388                         } else {
 389                                 pr_err("%s: option %s: invalid value (%llu).\n",
 390                                        bond->dev->name, opt->name, val->value);
 391                         }
 392                 }
 393                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 394                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 395                 if (!maxval)
 396                         break;
 397                 pr_err("%s: option %s: allowed values %llu - %llu.\n",
 398                        bond->dev->name, opt->name, minval ? minval->value : 0,
 399                        maxval->value);
 400                 break;
 401         case -EACCES:
 402                 bond_opt_dep_print(bond, opt);
 403                 break;
 404         case -ENOTEMPTY:
 405                 pr_err("%s: option %s: unable to set because the bond device has slaves.\n",
 406                        bond->dev->name, opt->name);
 407                 break;
 408         case -EBUSY:
 409                 pr_err("%s: option %s: unable to set because the bond device is up.\n",
 410                        bond->dev->name, opt->name);
 411                 break;
 412         default:
 413                 break;
 414         }
 415 }
 416
 417 /**
 418  * __bond_opt_set - set a bonding option
 419  * @bond: target bond device
 420  * @option: option to set
 421  * @val: value to set it to
 422  *
 423  * This function is used to change the bond's option value, it can be
 424  * used for both enabling/changing an option and for disabling it. RTNL lock
 425  * must be obtained before calling this function.
 426  */
 427 int __bond_opt_set(struct bonding *bond,
 428                    unsigned int option, struct bond_opt_value *val)
 429 {
 430         struct bond_opt_value *retval = NULL;
 431         const struct bond_option *opt;
 432         int ret = -ENOENT;
 433
 434         ASSERT_RTNL();
 435
 436         opt = bond_opt_get(option);
 437         if (WARN_ON(!val) || WARN_ON(!opt))
 438                 goto out;
 439         ret = bond_opt_check_deps(bond, opt);
 440         if (ret)
 441                 goto out;
 442         retval = bond_opt_parse(opt, val);
 443         if (!retval) {
 444                 ret = -EINVAL;
 445                 goto out;
 446         }
 447         ret = opt->set(bond, retval);
 448 out:
 449         if (ret)
 450                 bond_opt_error_interpret(bond, opt, ret, val);
 451
 452         return ret;
 453 }
 454
 455 /**
 456  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 457  * @bond: target bond device
 458  * @option: option to set
 459  * @buf: value to set it to
 460  *
 461  * This function tries to acquire RTNL without blocking and if successful
 462  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 463  */
 464 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 465 {
 466         struct bond_opt_value optval;
 467         int ret;
 468
 469         if (!rtnl_trylock())
 470                 return restart_syscall();
 471         bond_opt_initstr(&optval, buf);
 472         ret = __bond_opt_set(bond, option, &optval);
 473         rtnl_unlock();
 474
 475         return ret;
 476 }
 477
 478 /**
 479  * bond_opt_get - get a pointer to an option
 480  * @option: option for which to return a pointer
 481  *
 482  * This function checks if option is valid and if so returns a pointer
 483  * to its entry in the bond_opts[] option array.
 484  */
 485 struct bond_option *bond_opt_get(unsigned int option)
 486 {
 487         if (!BOND_OPT_VALID(option))
 488                 return NULL;
 489
 490         return &bond_opts[option];
 491 }
 492
 493 int bond_option_mode_set(struct bonding *bond, struct bond_opt_value *newval)
 494 {
 495         if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
 496                 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
 497                         bond->dev->name, newval->string);
 498                 /* disable arp monitoring */
 499                 bond->params.arp_interval = 0;
 500                 /* set miimon to default value */
 501                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 502                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 503                         bond->dev->name, bond->params.miimon);
 504         }
 505
 506         /* don't cache arp_validate between modes */
 507         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 508         bond->params.mode = newval->value;
 509
 510         return 0;
 511 }
 512
 513 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 514                                                          struct slave *slave)
 515 {
 516         return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
 517 }
 518
 519 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 520 {
 521         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 522
 523         return __bond_option_active_slave_get(bond, slave);
 524 }
 525
 526 struct net_device *bond_option_active_slave_get(struct bonding *bond)
 527 {
 528         return __bond_option_active_slave_get(bond, bond->curr_active_slave);
 529 }
 530
 531 int bond_option_active_slave_set(struct bonding *bond,
 532                                  struct net_device *slave_dev)
 533 {
 534         int ret = 0;
 535
 536         if (slave_dev) {
 537                 if (!netif_is_bond_slave(slave_dev)) {
 538                         pr_err("Device %s is not bonding slave.\n",
 539                                slave_dev->name);
 540                         return -EINVAL;
 541                 }
 542
 543                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 544                         pr_err("%s: Device %s is not our slave.\n",
 545                                bond->dev->name, slave_dev->name);
 546                         return -EINVAL;
 547                 }
 548         }
 549
 550         if (!USES_PRIMARY(bond->params.mode)) {
 551                 pr_err("%s: Unable to change active slave; %s is in mode %d\n",
 552                        bond->dev->name, bond->dev->name, bond->params.mode);
 553                 return -EINVAL;
 554         }
 555
 556         block_netpoll_tx();
 557         write_lock_bh(&bond->curr_slave_lock);
 558
 559         /* check to see if we are clearing active */
 560         if (!slave_dev) {
 561                 pr_info("%s: Clearing current active slave.\n",
 562                 bond->dev->name);
 563                 rcu_assign_pointer(bond->curr_active_slave, NULL);
 564                 bond_select_active_slave(bond);
 565         } else {
 566                 struct slave *old_active = bond->curr_active_slave;
 567                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 568
 569                 BUG_ON(!new_active);
 570
 571                 if (new_active == old_active) {
 572                         /* do nothing */
 573                         pr_info("%s: %s is already the current active slave.\n",
 574                                 bond->dev->name, new_active->dev->name);
 575                 } else {
 576                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 577                             IS_UP(new_active->dev)) {
 578                                 pr_info("%s: Setting %s as active slave.\n",
 579                                         bond->dev->name, new_active->dev->name);
 580                                 bond_change_active_slave(bond, new_active);
 581                         } else {
 582                                 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
 583                                        bond->dev->name, new_active->dev->name,
 584                                        new_active->dev->name);
 585                                 ret = -EINVAL;
 586                         }
 587                 }
 588         }
 589
 590         write_unlock_bh(&bond->curr_slave_lock);
 591         unblock_netpoll_tx();
 592         return ret;
 593 }
 594
 595 int bond_option_miimon_set(struct bonding *bond, struct bond_opt_value *newval)
 596 {
 597         pr_info("%s: Setting MII monitoring interval to %llu.\n",
 598                 bond->dev->name, newval->value);
 599         bond->params.miimon = newval->value;
 600         if (bond->params.updelay)
 601                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 602                         bond->dev->name,
 603                         bond->params.updelay * bond->params.miimon);
 604         if (bond->params.downdelay)
 605                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 606                         bond->dev->name,
 607                         bond->params.downdelay * bond->params.miimon);
 608         if (newval->value && bond->params.arp_interval) {
 609                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 610                         bond->dev->name);
 611                 bond->params.arp_interval = 0;
 612                 if (bond->params.arp_validate)
 613                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 614         }
 615         if (bond->dev->flags & IFF_UP) {
 616                 /* If the interface is up, we may need to fire off
 617                  * the MII timer. If the interface is down, the
 618                  * timer will get fired off when the open function
 619                  * is called.
 620                  */
 621                 if (!newval->value) {
 622                         cancel_delayed_work_sync(&bond->mii_work);
 623                 } else {
 624                         cancel_delayed_work_sync(&bond->arp_work);
 625                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 626                 }
 627         }
 628
 629         return 0;
 630 }
 631
 632 int bond_option_updelay_set(struct bonding *bond, struct bond_opt_value *newval)
 633 {
 634         if (!bond->params.miimon) {
 635                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 636                        bond->dev->name);
 637                 return -EPERM;
 638         }
 639         if ((newval->value % bond->params.miimon) != 0) {
 640                 pr_warn("%s: Warning: up delay (%llu) is not a multiple of miimon (%d), updelay rounded to %llu ms\n",
 641                         bond->dev->name, newval->value,
 642                         bond->params.miimon,
 643                         (newval->value / bond->params.miimon) *
 644                         bond->params.miimon);
 645         }
 646         bond->params.updelay = newval->value / bond->params.miimon;
 647         pr_info("%s: Setting up delay to %d.\n",
 648                 bond->dev->name,
 649                 bond->params.updelay * bond->params.miimon);
 650
 651         return 0;
 652 }
 653
 654 int bond_option_downdelay_set(struct bonding *bond,
 655                               struct bond_opt_value *newval)
 656 {
 657         if (!bond->params.miimon) {
 658                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 659                        bond->dev->name);
 660                 return -EPERM;
 661         }
 662         if ((newval->value % bond->params.miimon) != 0) {
 663                 pr_warn("%s: Warning: down delay (%llu) is not a multiple of miimon (%d), delay rounded to %llu ms\n",
 664                         bond->dev->name, newval->value,
 665                         bond->params.miimon,
 666                         (newval->value / bond->params.miimon) *
 667                         bond->params.miimon);
 668         }
 669         bond->params.downdelay = newval->value / bond->params.miimon;
 670         pr_info("%s: Setting down delay to %d.\n",
 671                 bond->dev->name,
 672                 bond->params.downdelay * bond->params.miimon);
 673
 674         return 0;
 675 }
 676
 677 int bond_option_use_carrier_set(struct bonding *bond, int use_carrier)
 678 {
 679         if ((use_carrier == 0) || (use_carrier == 1)) {
 680                 bond->params.use_carrier = use_carrier;
 681                 pr_info("%s: Setting use_carrier to %d.\n",
 682                         bond->dev->name, use_carrier);
 683         } else {
 684                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
 685                         bond->dev->name, use_carrier);
 686         }
 687
 688         return 0;
 689 }
 690
 691 int bond_option_arp_interval_set(struct bonding *bond,
 692                                  struct bond_opt_value *newval)
 693 {
 694         pr_info("%s: Setting ARP monitoring interval to %llu.\n",
 695                 bond->dev->name, newval->value);
 696         bond->params.arp_interval = newval->value;
 697         if (newval->value) {
 698                 if (bond->params.miimon) {
 699                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 700                                 bond->dev->name, bond->dev->name);
 701                         bond->params.miimon = 0;
 702                 }
 703                 if (!bond->params.arp_targets[0])
 704                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 705                                 bond->dev->name);
 706         }
 707         if (bond->dev->flags & IFF_UP) {
 708                 /* If the interface is up, we may need to fire off
 709                  * the ARP timer.  If the interface is down, the
 710                  * timer will get fired off when the open function
 711                  * is called.
 712                  */
 713                 if (!newval->value) {
 714                         if (bond->params.arp_validate)
 715                                 bond->recv_probe = NULL;
 716                         cancel_delayed_work_sync(&bond->arp_work);
 717                 } else {
 718                         /* arp_validate can be set only in active-backup mode */
 719                         if (bond->params.arp_validate)
 720                                 bond->recv_probe = bond_arp_rcv;
 721                         cancel_delayed_work_sync(&bond->mii_work);
 722                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 723                 }
 724         }
 725
 726         return 0;
 727 }
 728
 729 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 730                                             __be32 target,
 731                                             unsigned long last_rx)
 732 {
 733         __be32 *targets = bond->params.arp_targets;
 734         struct list_head *iter;
 735         struct slave *slave;
 736
 737         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 738                 bond_for_each_slave(bond, slave, iter)
 739                         slave->target_last_arp_rx[slot] = last_rx;
 740                 targets[slot] = target;
 741         }
 742 }
 743
 744 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 745 {
 746         __be32 *targets = bond->params.arp_targets;
 747         int ind;
 748
 749         if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
 750                 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 751                        bond->dev->name, &target);
 752                 return -EINVAL;
 753         }
 754
 755         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 756                 pr_err("%s: ARP target %pI4 is already present\n",
 757                        bond->dev->name, &target);
 758                 return -EINVAL;
 759         }
 760
 761         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 762         if (ind == -1) {
 763                 pr_err("%s: ARP target table is full!\n",
 764                        bond->dev->name);
 765                 return -EINVAL;
 766         }
 767
 768         pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target);
 769
 770         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 771
 772         return 0;
 773 }
 774
 775 int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 776 {
 777         int ret;
 778
 779         /* not to race with bond_arp_rcv */
 780         write_lock_bh(&bond->lock);
 781         ret = _bond_option_arp_ip_target_add(bond, target);
 782         write_unlock_bh(&bond->lock);
 783
 784         return ret;
 785 }
 786
 787 int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 788 {
 789         __be32 *targets = bond->params.arp_targets;
 790         struct list_head *iter;
 791         struct slave *slave;
 792         unsigned long *targets_rx;
 793         int ind, i;
 794
 795         if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
 796                 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 797                        bond->dev->name, &target);
 798                 return -EINVAL;
 799         }
 800
 801         ind = bond_get_targets_ip(targets, target);
 802         if (ind == -1) {
 803                 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
 804                        bond->dev->name, &target);
 805                 return -EINVAL;
 806         }
 807
 808         if (ind == 0 && !targets[1] && bond->params.arp_interval)
 809                 pr_warn("%s: removing last arp target with arp_interval on\n",
 810                         bond->dev->name);
 811
 812         pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
 813                 &target);
 814
 815         /* not to race with bond_arp_rcv */
 816         write_lock_bh(&bond->lock);
 817
 818         bond_for_each_slave(bond, slave, iter) {
 819                 targets_rx = slave->target_last_arp_rx;
 820                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 821                         targets_rx[i] = targets_rx[i+1];
 822                 targets_rx[i] = 0;
 823         }
 824         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 825                 targets[i] = targets[i+1];
 826         targets[i] = 0;
 827
 828         write_unlock_bh(&bond->lock);
 829
 830         return 0;
 831 }
 832
 833 void bond_option_arp_ip_targets_clear(struct bonding *bond)
 834 {
 835         int i;
 836
 837         /* not to race with bond_arp_rcv */
 838         write_lock_bh(&bond->lock);
 839         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 840                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
 841         write_unlock_bh(&bond->lock);
 842 }
 843
 844 int bond_option_arp_ip_targets_set(struct bonding *bond,
 845                                    struct bond_opt_value *newval)
 846 {
 847         int ret = -EPERM;
 848         __be32 target;
 849
 850         if (newval->string) {
 851                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
 852                         pr_err("%s: invalid ARP target %pI4 specified\n",
 853                                bond->dev->name, &target);
 854                         return ret;
 855                 }
 856                 if (newval->string[0] == '+')
 857                         ret = bond_option_arp_ip_target_add(bond, target);
 858                 else if (newval->string[0] == '-')
 859                         ret = bond_option_arp_ip_target_rem(bond, target);
 860                 else
 861                         pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 862                                bond->dev->name);
 863         } else {
 864                 target = newval->value;
 865                 ret = bond_option_arp_ip_target_add(bond, target);
 866         }
 867
 868         return ret;
 869 }
 870
 871 int bond_option_arp_validate_set(struct bonding *bond,
 872                                  struct bond_opt_value *newval)
 873 {
 874         pr_info("%s: setting arp_validate to %s (%llu).\n",
 875                 bond->dev->name, newval->string, newval->value);
 876
 877         if (bond->dev->flags & IFF_UP) {
 878                 if (!newval->value)
 879                         bond->recv_probe = NULL;
 880                 else if (bond->params.arp_interval)
 881                         bond->recv_probe = bond_arp_rcv;
 882         }
 883         bond->params.arp_validate = newval->value;
 884
 885         return 0;
 886 }
 887
 888 int bond_option_arp_all_targets_set(struct bonding *bond,
 889                                     struct bond_opt_value *newval)
 890 {
 891         pr_info("%s: setting arp_all_targets to %s (%llu).\n",
 892                 bond->dev->name, newval->string, newval->value);
 893         bond->params.arp_all_targets = newval->value;
 894
 895         return 0;
 896 }
 897
 898 int bond_option_primary_set(struct bonding *bond, struct bond_opt_value *newval)
 899 {
 900         char *p, *primary = newval->string;
 901         struct list_head *iter;
 902         struct slave *slave;
 903
 904         block_netpoll_tx();
 905         read_lock(&bond->lock);
 906         write_lock_bh(&bond->curr_slave_lock);
 907
 908         p = strchr(primary, '\n');
 909         if (p)
 910                 *p = '\0';
 911         /* check to see if we are clearing primary */
 912         if (!strlen(primary)) {
 913                 pr_info("%s: Setting primary slave to None.\n",
 914                         bond->dev->name);
 915                 bond->primary_slave = NULL;
 916                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
 917                 bond_select_active_slave(bond);
 918                 goto out;
 919         }
 920
 921         bond_for_each_slave(bond, slave, iter) {
 922                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
 923                         pr_info("%s: Setting %s as primary slave.\n",
 924                                 bond->dev->name, slave->dev->name);
 925                         bond->primary_slave = slave;
 926                         strcpy(bond->params.primary, slave->dev->name);
 927                         bond_select_active_slave(bond);
 928                         goto out;
 929                 }
 930         }
 931
 932         strncpy(bond->params.primary, primary, IFNAMSIZ);
 933         bond->params.primary[IFNAMSIZ - 1] = 0;
 934
 935         pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n",
 936                 bond->dev->name, primary, bond->dev->name);
 937
 938 out:
 939         write_unlock_bh(&bond->curr_slave_lock);
 940         read_unlock(&bond->lock);
 941         unblock_netpoll_tx();
 942
 943         return 0;
 944 }
 945
 946 int bond_option_primary_reselect_set(struct bonding *bond, int primary_reselect)
 947 {
 948         if (bond_parm_tbl_lookup(primary_reselect, pri_reselect_tbl) < 0) {
 949                 pr_err("%s: Ignoring invalid primary_reselect value %d.\n",
 950                        bond->dev->name, primary_reselect);
 951                 return -EINVAL;
 952         }
 953
 954         bond->params.primary_reselect = primary_reselect;
 955         pr_info("%s: setting primary_reselect to %s (%d).\n",
 956                 bond->dev->name, pri_reselect_tbl[primary_reselect].modename,
 957                 primary_reselect);
 958
 959         block_netpoll_tx();
 960         write_lock_bh(&bond->curr_slave_lock);
 961         bond_select_active_slave(bond);
 962         write_unlock_bh(&bond->curr_slave_lock);
 963         unblock_netpoll_tx();
 964
 965         return 0;
 966 }
 967
 968 int bond_option_fail_over_mac_set(struct bonding *bond,
 969                                   struct bond_opt_value *newval)
 970 {
 971         pr_info("%s: Setting fail_over_mac to %s (%llu).\n",
 972                 bond->dev->name, newval->string, newval->value);
 973         bond->params.fail_over_mac = newval->value;
 974
 975         return 0;
 976 }
 977
 978 int bond_option_xmit_hash_policy_set(struct bonding *bond,
 979                                      struct bond_opt_value *newval)
 980 {
 981         pr_info("%s: setting xmit hash policy to %s (%llu).\n",
 982                 bond->dev->name, newval->string, newval->value);
 983         bond->params.xmit_policy = newval->value;
 984
 985         return 0;
 986 }
 987
 988 int bond_option_resend_igmp_set(struct bonding *bond, int resend_igmp)
 989 {
 990         if (resend_igmp < 0 || resend_igmp > 255) {
 991                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
 992                        bond->dev->name, resend_igmp);
 993                 return -EINVAL;
 994         }
 995
 996         bond->params.resend_igmp = resend_igmp;
 997         pr_info("%s: Setting resend_igmp to %d.\n",
 998                 bond->dev->name, resend_igmp);
 999
1000         return 0;
1001 }
1002
1003 int bond_option_num_peer_notif_set(struct bonding *bond,
1004                                    struct bond_opt_value *newval)
1005 {
1006         bond->params.num_peer_notif = newval->value;
1007
1008         return 0;
1009 }
1010
1011 int bond_option_all_slaves_active_set(struct bonding *bond,
1012                                       int all_slaves_active)
1013 {
1014         struct list_head *iter;
1015         struct slave *slave;
1016
1017         if (all_slaves_active == bond->params.all_slaves_active)
1018                 return 0;
1019
1020         if ((all_slaves_active == 0) || (all_slaves_active == 1)) {
1021                 bond->params.all_slaves_active = all_slaves_active;
1022         } else {
1023                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1024                         bond->dev->name, all_slaves_active);
1025                 return -EINVAL;
1026         }
1027
1028         bond_for_each_slave(bond, slave, iter) {
1029                 if (!bond_is_active_slave(slave)) {
1030                         if (all_slaves_active)
1031                                 slave->inactive = 0;
1032                         else
1033                                 slave->inactive = 1;
1034                 }
1035         }
1036
1037         return 0;
1038 }
1039
1040 int bond_option_min_links_set(struct bonding *bond,
1041                               struct bond_opt_value *newval)
1042 {
1043         pr_info("%s: Setting min links value to %llu\n",
1044                 bond->dev->name, newval->value);
1045         bond->params.min_links = newval->value;
1046
1047         return 0;
1048 }
1049
1050 int bond_option_lp_interval_set(struct bonding *bond, int lp_interval)
1051 {
1052         if (lp_interval <= 0) {
1053                 pr_err("%s: lp_interval must be between 1 and %d\n",
1054                        bond->dev->name, INT_MAX);
1055                 return -EINVAL;
1056         }
1057
1058         bond->params.lp_interval = lp_interval;
1059
1060         return 0;
1061 }
1062
1063 int bond_option_pps_set(struct bonding *bond, struct bond_opt_value *newval)
1064 {
1065         bond->params.packets_per_slave = newval->value;
1066         if (newval->value > 0) {
1067                 bond->params.reciprocal_packets_per_slave =
1068                         reciprocal_value(newval->value);
1069         } else {
1070                 /* reciprocal_packets_per_slave is unused if
1071                  * packets_per_slave is 0 or 1, just initialize it
1072                  */
1073                 bond->params.reciprocal_packets_per_slave =
1074                         (struct reciprocal_value) { 0 };
1075         }
1076
1077         return 0;
1078 }
1079
1080 int bond_option_lacp_rate_set(struct bonding *bond,
1081                               struct bond_opt_value *newval)
1082 {
1083         pr_info("%s: Setting LACP rate to %s (%llu).\n",
1084                 bond->dev->name, newval->string, newval->value);
1085         bond->params.lacp_fast = newval->value;
1086         bond_3ad_update_lacp_rate(bond);
1087
1088         return 0;
1089 }
1090
1091 int bond_option_ad_select_set(struct bonding *bond,
1092                               struct bond_opt_value *newval)
1093 {
1094         pr_info("%s: Setting ad_select to %s (%llu).\n",
1095                 bond->dev->name, newval->string, newval->value);
1096         bond->params.ad_select = newval->value;
1097
1098         return 0;
1099 }