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/spinlock.h>
  18 #include <linux/rcupdate.h>
  19 #include <linux/ctype.h>
  20 #include <linux/inet.h>
  21 #include "bonding.h"
  22
  23 static int bond_option_active_slave_set(struct bonding *bond,
  24                                         const struct bond_opt_value *newval);
  25 static int bond_option_miimon_set(struct bonding *bond,
  26                                   const struct bond_opt_value *newval);
  27 static int bond_option_updelay_set(struct bonding *bond,
  28                                    const struct bond_opt_value *newval);
  29 static int bond_option_downdelay_set(struct bonding *bond,
  30                                      const struct bond_opt_value *newval);
  31 static int bond_option_use_carrier_set(struct bonding *bond,
  32                                        const struct bond_opt_value *newval);
  33 static int bond_option_arp_interval_set(struct bonding *bond,
  34                                         const struct bond_opt_value *newval);
  35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  37 static int bond_option_arp_ip_targets_set(struct bonding *bond,
  38                                           const struct bond_opt_value *newval);
  39 static int bond_option_arp_validate_set(struct bonding *bond,
  40                                         const struct bond_opt_value *newval);
  41 static int bond_option_arp_all_targets_set(struct bonding *bond,
  42                                            const struct bond_opt_value *newval);
  43 static int bond_option_primary_set(struct bonding *bond,
  44                                    const struct bond_opt_value *newval);
  45 static int bond_option_primary_reselect_set(struct bonding *bond,
  46                                             const struct bond_opt_value *newval);
  47 static int bond_option_fail_over_mac_set(struct bonding *bond,
  48                                          const struct bond_opt_value *newval);
  49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  50                                             const struct bond_opt_value *newval);
  51 static int bond_option_resend_igmp_set(struct bonding *bond,
  52                                        const struct bond_opt_value *newval);
  53 static int bond_option_num_peer_notif_set(struct bonding *bond,
  54                                           const struct bond_opt_value *newval);
  55 static int bond_option_all_slaves_active_set(struct bonding *bond,
  56                                              const struct bond_opt_value *newval);
  57 static int bond_option_min_links_set(struct bonding *bond,
  58                                      const struct bond_opt_value *newval);
  59 static int bond_option_lp_interval_set(struct bonding *bond,
  60                                        const struct bond_opt_value *newval);
  61 static int bond_option_pps_set(struct bonding *bond,
  62                                const struct bond_opt_value *newval);
  63 static int bond_option_lacp_rate_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_ad_select_set(struct bonding *bond,
  66                                      const struct bond_opt_value *newval);
  67 static int bond_option_queue_id_set(struct bonding *bond,
  68                                     const struct bond_opt_value *newval);
  69 static int bond_option_mode_set(struct bonding *bond,
  70                                 const struct bond_opt_value *newval);
  71 static int bond_option_slaves_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73
  74
  75 static const struct bond_opt_value bond_mode_tbl[] = {
  76         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  77         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  78         { "balance-xor",   BOND_MODE_XOR,          0},
  79         { "broadcast",     BOND_MODE_BROADCAST,    0},
  80         { "802.3ad",       BOND_MODE_8023AD,       0},
  81         { "balance-tlb",   BOND_MODE_TLB,          0},
  82         { "balance-alb",   BOND_MODE_ALB,          0},
  83         { NULL,            -1,                     0},
  84 };
  85
  86 static const struct bond_opt_value bond_pps_tbl[] = {
  87         { "default", 1,         BOND_VALFLAG_DEFAULT},
  88         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  89         { NULL,      -1,        0},
  90 };
  91
  92 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  93         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
  94         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
  95         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
  96         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
  97         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
  98         { NULL,       -1,                       0},
  99 };
 100
 101 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 102         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 103         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 104         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 105         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 106         { "filter",             BOND_ARP_FILTER,                0},
 107         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 108         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 109         { NULL,                 -1,                             0},
 110 };
 111
 112 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 113         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 114         { "all", BOND_ARP_TARGETS_ALL, 0},
 115         { NULL,  -1,                   0},
 116 };
 117
 118 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 119         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 120         { "active", BOND_FOM_ACTIVE, 0},
 121         { "follow", BOND_FOM_FOLLOW, 0},
 122         { NULL,     -1,              0},
 123 };
 124
 125 static const struct bond_opt_value bond_intmax_tbl[] = {
 126         { "off",     0,       BOND_VALFLAG_DEFAULT},
 127         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 128         { NULL,      -1,      0}
 129 };
 130
 131 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 132         { "slow", AD_LACP_SLOW, 0},
 133         { "fast", AD_LACP_FAST, 0},
 134         { NULL,   -1,           0},
 135 };
 136
 137 static const struct bond_opt_value bond_ad_select_tbl[] = {
 138         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 139         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 140         { "count",     BOND_AD_COUNT,     0},
 141         { NULL,        -1,                0},
 142 };
 143
 144 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 145         { "off",     0,   0},
 146         { "maxval",  255, BOND_VALFLAG_MAX},
 147         { "default", 1,   BOND_VALFLAG_DEFAULT},
 148         { NULL,      -1,  0}
 149 };
 150
 151 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 152         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 153         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 154         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 155         { NULL,      -1},
 156 };
 157
 158 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 159         { "off", 0,  0},
 160         { "on",  1,  BOND_VALFLAG_DEFAULT},
 161         { NULL,  -1, 0}
 162 };
 163
 164 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 165         { "off", 0,  BOND_VALFLAG_DEFAULT},
 166         { "on",  1,  0},
 167         { NULL,  -1, 0}
 168 };
 169
 170 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 171         { "off",     0,   0},
 172         { "maxval",  255, BOND_VALFLAG_MAX},
 173         { "default", 1,   BOND_VALFLAG_DEFAULT},
 174         { NULL,      -1,  0}
 175 };
 176
 177 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 178         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 179         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 180         { NULL,      -1,      0},
 181 };
 182
 183 static const struct bond_option bond_opts[] = {
 184         [BOND_OPT_MODE] = {
 185                 .id = BOND_OPT_MODE,
 186                 .name = "mode",
 187                 .desc = "bond device mode",
 188                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 189                 .values = bond_mode_tbl,
 190                 .set = bond_option_mode_set
 191         },
 192         [BOND_OPT_PACKETS_PER_SLAVE] = {
 193                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 194                 .name = "packets_per_slave",
 195                 .desc = "Packets to send per slave in RR mode",
 196                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 197                 .values = bond_pps_tbl,
 198                 .set = bond_option_pps_set
 199         },
 200         [BOND_OPT_XMIT_HASH] = {
 201                 .id = BOND_OPT_XMIT_HASH,
 202                 .name = "xmit_hash_policy",
 203                 .desc = "balance-xor and 802.3ad hashing method",
 204                 .values = bond_xmit_hashtype_tbl,
 205                 .set = bond_option_xmit_hash_policy_set
 206         },
 207         [BOND_OPT_ARP_VALIDATE] = {
 208                 .id = BOND_OPT_ARP_VALIDATE,
 209                 .name = "arp_validate",
 210                 .desc = "validate src/dst of ARP probes",
 211                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 212                                BIT(BOND_MODE_ALB),
 213                 .values = bond_arp_validate_tbl,
 214                 .set = bond_option_arp_validate_set
 215         },
 216         [BOND_OPT_ARP_ALL_TARGETS] = {
 217                 .id = BOND_OPT_ARP_ALL_TARGETS,
 218                 .name = "arp_all_targets",
 219                 .desc = "fail on any/all arp targets timeout",
 220                 .values = bond_arp_all_targets_tbl,
 221                 .set = bond_option_arp_all_targets_set
 222         },
 223         [BOND_OPT_FAIL_OVER_MAC] = {
 224                 .id = BOND_OPT_FAIL_OVER_MAC,
 225                 .name = "fail_over_mac",
 226                 .desc = "For active-backup, do not set all slaves to the same MAC",
 227                 .flags = BOND_OPTFLAG_NOSLAVES,
 228                 .values = bond_fail_over_mac_tbl,
 229                 .set = bond_option_fail_over_mac_set
 230         },
 231         [BOND_OPT_ARP_INTERVAL] = {
 232                 .id = BOND_OPT_ARP_INTERVAL,
 233                 .name = "arp_interval",
 234                 .desc = "arp interval in milliseconds",
 235                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 236                                BIT(BOND_MODE_ALB),
 237                 .values = bond_intmax_tbl,
 238                 .set = bond_option_arp_interval_set
 239         },
 240         [BOND_OPT_ARP_TARGETS] = {
 241                 .id = BOND_OPT_ARP_TARGETS,
 242                 .name = "arp_ip_target",
 243                 .desc = "arp targets in n.n.n.n form",
 244                 .flags = BOND_OPTFLAG_RAWVAL,
 245                 .set = bond_option_arp_ip_targets_set
 246         },
 247         [BOND_OPT_DOWNDELAY] = {
 248                 .id = BOND_OPT_DOWNDELAY,
 249                 .name = "downdelay",
 250                 .desc = "Delay before considering link down, in milliseconds",
 251                 .values = bond_intmax_tbl,
 252                 .set = bond_option_downdelay_set
 253         },
 254         [BOND_OPT_UPDELAY] = {
 255                 .id = BOND_OPT_UPDELAY,
 256                 .name = "updelay",
 257                 .desc = "Delay before considering link up, in milliseconds",
 258                 .values = bond_intmax_tbl,
 259                 .set = bond_option_updelay_set
 260         },
 261         [BOND_OPT_LACP_RATE] = {
 262                 .id = BOND_OPT_LACP_RATE,
 263                 .name = "lacp_rate",
 264                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 265                 .flags = BOND_OPTFLAG_IFDOWN,
 266                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 267                 .values = bond_lacp_rate_tbl,
 268                 .set = bond_option_lacp_rate_set
 269         },
 270         [BOND_OPT_MINLINKS] = {
 271                 .id = BOND_OPT_MINLINKS,
 272                 .name = "min_links",
 273                 .desc = "Minimum number of available links before turning on carrier",
 274                 .values = bond_intmax_tbl,
 275                 .set = bond_option_min_links_set
 276         },
 277         [BOND_OPT_AD_SELECT] = {
 278                 .id = BOND_OPT_AD_SELECT,
 279                 .name = "ad_select",
 280                 .desc = "803.ad aggregation selection logic",
 281                 .flags = BOND_OPTFLAG_IFDOWN,
 282                 .values = bond_ad_select_tbl,
 283                 .set = bond_option_ad_select_set
 284         },
 285         [BOND_OPT_NUM_PEER_NOTIF] = {
 286                 .id = BOND_OPT_NUM_PEER_NOTIF,
 287                 .name = "num_unsol_na",
 288                 .desc = "Number of peer notifications to send on failover event",
 289                 .values = bond_num_peer_notif_tbl,
 290                 .set = bond_option_num_peer_notif_set
 291         },
 292         [BOND_OPT_MIIMON] = {
 293                 .id = BOND_OPT_MIIMON,
 294                 .name = "miimon",
 295                 .desc = "Link check interval in milliseconds",
 296                 .values = bond_intmax_tbl,
 297                 .set = bond_option_miimon_set
 298         },
 299         [BOND_OPT_PRIMARY] = {
 300                 .id = BOND_OPT_PRIMARY,
 301                 .name = "primary",
 302                 .desc = "Primary network device to use",
 303                 .flags = BOND_OPTFLAG_RAWVAL,
 304                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 305                                                 BIT(BOND_MODE_TLB) |
 306                                                 BIT(BOND_MODE_ALB)),
 307                 .set = bond_option_primary_set
 308         },
 309         [BOND_OPT_PRIMARY_RESELECT] = {
 310                 .id = BOND_OPT_PRIMARY_RESELECT,
 311                 .name = "primary_reselect",
 312                 .desc = "Reselect primary slave once it comes up",
 313                 .values = bond_primary_reselect_tbl,
 314                 .set = bond_option_primary_reselect_set
 315         },
 316         [BOND_OPT_USE_CARRIER] = {
 317                 .id = BOND_OPT_USE_CARRIER,
 318                 .name = "use_carrier",
 319                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 320                 .values = bond_use_carrier_tbl,
 321                 .set = bond_option_use_carrier_set
 322         },
 323         [BOND_OPT_ACTIVE_SLAVE] = {
 324                 .id = BOND_OPT_ACTIVE_SLAVE,
 325                 .name = "active_slave",
 326                 .desc = "Currently active slave",
 327                 .flags = BOND_OPTFLAG_RAWVAL,
 328                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 329                                                 BIT(BOND_MODE_TLB) |
 330                                                 BIT(BOND_MODE_ALB)),
 331                 .set = bond_option_active_slave_set
 332         },
 333         [BOND_OPT_QUEUE_ID] = {
 334                 .id = BOND_OPT_QUEUE_ID,
 335                 .name = "queue_id",
 336                 .desc = "Set queue id of a slave",
 337                 .flags = BOND_OPTFLAG_RAWVAL,
 338                 .set = bond_option_queue_id_set
 339         },
 340         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 341                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 342                 .name = "all_slaves_active",
 343                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 344                 .values = bond_all_slaves_active_tbl,
 345                 .set = bond_option_all_slaves_active_set
 346         },
 347         [BOND_OPT_RESEND_IGMP] = {
 348                 .id = BOND_OPT_RESEND_IGMP,
 349                 .name = "resend_igmp",
 350                 .desc = "Number of IGMP membership reports to send on link failure",
 351                 .values = bond_resend_igmp_tbl,
 352                 .set = bond_option_resend_igmp_set
 353         },
 354         [BOND_OPT_LP_INTERVAL] = {
 355                 .id = BOND_OPT_LP_INTERVAL,
 356                 .name = "lp_interval",
 357                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 358                 .values = bond_lp_interval_tbl,
 359                 .set = bond_option_lp_interval_set
 360         },
 361         [BOND_OPT_SLAVES] = {
 362                 .id = BOND_OPT_SLAVES,
 363                 .name = "slaves",
 364                 .desc = "Slave membership management",
 365                 .flags = BOND_OPTFLAG_RAWVAL,
 366                 .set = bond_option_slaves_set
 367         },
 368         { }
 369 };
 370
 371 /* Searches for a value in opt's values[] table */
 372 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 373 {
 374         const struct bond_option *opt;
 375         int i;
 376
 377         opt = bond_opt_get(option);
 378         if (WARN_ON(!opt))
 379                 return NULL;
 380         for (i = 0; opt->values && opt->values[i].string; i++)
 381                 if (opt->values[i].value == val)
 382                         return &opt->values[i];
 383
 384         return NULL;
 385 }
 386
 387 /* Searches for a value in opt's values[] table which matches the flagmask */
 388 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 389                                                  u32 flagmask)
 390 {
 391         int i;
 392
 393         for (i = 0; opt->values && opt->values[i].string; i++)
 394                 if (opt->values[i].flags & flagmask)
 395                         return &opt->values[i];
 396
 397         return NULL;
 398 }
 399
 400 /* If maxval is missing then there's no range to check. In case minval is
 401  * missing then it's considered to be 0.
 402  */
 403 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 404 {
 405         const struct bond_opt_value *minval, *maxval;
 406
 407         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 408         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 409         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 410                 return false;
 411
 412         return true;
 413 }
 414
 415 /**
 416  * bond_opt_parse - parse option value
 417  * @opt: the option to parse against
 418  * @val: value to parse
 419  *
 420  * This function tries to extract the value from @val and check if it's
 421  * a possible match for the option and returns NULL if a match isn't found,
 422  * or the struct_opt_value that matched. It also strips the new line from
 423  * @val->string if it's present.
 424  */
 425 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 426                                             struct bond_opt_value *val)
 427 {
 428         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 429         const struct bond_opt_value *tbl;
 430         const struct bond_opt_value *ret = NULL;
 431         bool checkval;
 432         int i, rv;
 433
 434         /* No parsing if the option wants a raw val */
 435         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 436                 return val;
 437
 438         tbl = opt->values;
 439         if (!tbl)
 440                 goto out;
 441
 442         /* ULLONG_MAX is used to bypass string processing */
 443         checkval = val->value != ULLONG_MAX;
 444         if (!checkval) {
 445                 if (!val->string)
 446                         goto out;
 447                 p = strchr(val->string, '\n');
 448                 if (p)
 449                         *p = '\0';
 450                 for (p = val->string; *p; p++)
 451                         if (!(isdigit(*p) || isspace(*p)))
 452                                 break;
 453                 /* The following code extracts the string to match or the value
 454                  * and sets checkval appropriately
 455                  */
 456                 if (*p) {
 457                         rv = sscanf(val->string, "%32s", valstr);
 458                 } else {
 459                         rv = sscanf(val->string, "%llu", &val->value);
 460                         checkval = true;
 461                 }
 462                 if (!rv)
 463                         goto out;
 464         }
 465
 466         for (i = 0; tbl[i].string; i++) {
 467                 /* Check for exact match */
 468                 if (checkval) {
 469                         if (val->value == tbl[i].value)
 470                                 ret = &tbl[i];
 471                 } else {
 472                         if (!strcmp(valstr, "default") &&
 473                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 474                                 ret = &tbl[i];
 475
 476                         if (!strcmp(valstr, tbl[i].string))
 477                                 ret = &tbl[i];
 478                 }
 479                 /* Found an exact match */
 480                 if (ret)
 481                         goto out;
 482         }
 483         /* Possible range match */
 484         if (checkval && bond_opt_check_range(opt, val->value))
 485                 ret = val;
 486 out:
 487         return ret;
 488 }
 489
 490 /* Check opt's dependencies against bond mode and currently set options */
 491 static int bond_opt_check_deps(struct bonding *bond,
 492                                const struct bond_option *opt)
 493 {
 494         struct bond_params *params = &bond->params;
 495
 496         if (test_bit(params->mode, &opt->unsuppmodes))
 497                 return -EACCES;
 498         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 499                 return -ENOTEMPTY;
 500         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 501                 return -EBUSY;
 502
 503         return 0;
 504 }
 505
 506 static void bond_opt_dep_print(struct bonding *bond,
 507                                const struct bond_option *opt)
 508 {
 509         const struct bond_opt_value *modeval;
 510         struct bond_params *params;
 511
 512         params = &bond->params;
 513         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 514         if (test_bit(params->mode, &opt->unsuppmodes))
 515                 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 516                        bond->dev->name, opt->name,
 517                        modeval->string, modeval->value);
 518 }
 519
 520 static void bond_opt_error_interpret(struct bonding *bond,
 521                                      const struct bond_option *opt,
 522                                      int error, const struct bond_opt_value *val)
 523 {
 524         const struct bond_opt_value *minval, *maxval;
 525         char *p;
 526
 527         switch (error) {
 528         case -EINVAL:
 529                 if (val) {
 530                         if (val->string) {
 531                                 /* sometimes RAWVAL opts may have new lines */
 532                                 p = strchr(val->string, '\n');
 533                                 if (p)
 534                                         *p = '\0';
 535                                 pr_err("%s: option %s: invalid value (%s)\n",
 536                                        bond->dev->name, opt->name, val->string);
 537                         } else {
 538                                 pr_err("%s: option %s: invalid value (%llu)\n",
 539                                        bond->dev->name, opt->name, val->value);
 540                         }
 541                 }
 542                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 543                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 544                 if (!maxval)
 545                         break;
 546                 pr_err("%s: option %s: allowed values %llu - %llu\n",
 547                        bond->dev->name, opt->name, minval ? minval->value : 0,
 548                        maxval->value);
 549                 break;
 550         case -EACCES:
 551                 bond_opt_dep_print(bond, opt);
 552                 break;
 553         case -ENOTEMPTY:
 554                 pr_err("%s: option %s: unable to set because the bond device has slaves\n",
 555                        bond->dev->name, opt->name);
 556                 break;
 557         case -EBUSY:
 558                 pr_err("%s: option %s: unable to set because the bond device is up\n",
 559                        bond->dev->name, opt->name);
 560                 break;
 561         default:
 562                 break;
 563         }
 564 }
 565
 566 /**
 567  * __bond_opt_set - set a bonding option
 568  * @bond: target bond device
 569  * @option: option to set
 570  * @val: value to set it to
 571  *
 572  * This function is used to change the bond's option value, it can be
 573  * used for both enabling/changing an option and for disabling it. RTNL lock
 574  * must be obtained before calling this function.
 575  */
 576 int __bond_opt_set(struct bonding *bond,
 577                    unsigned int option, struct bond_opt_value *val)
 578 {
 579         const struct bond_opt_value *retval = NULL;
 580         const struct bond_option *opt;
 581         int ret = -ENOENT;
 582
 583         ASSERT_RTNL();
 584
 585         opt = bond_opt_get(option);
 586         if (WARN_ON(!val) || WARN_ON(!opt))
 587                 goto out;
 588         ret = bond_opt_check_deps(bond, opt);
 589         if (ret)
 590                 goto out;
 591         retval = bond_opt_parse(opt, val);
 592         if (!retval) {
 593                 ret = -EINVAL;
 594                 goto out;
 595         }
 596         ret = opt->set(bond, retval);
 597 out:
 598         if (ret)
 599                 bond_opt_error_interpret(bond, opt, ret, val);
 600
 601         return ret;
 602 }
 603
 604 /**
 605  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 606  * @bond: target bond device
 607  * @option: option to set
 608  * @buf: value to set it to
 609  *
 610  * This function tries to acquire RTNL without blocking and if successful
 611  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 612  */
 613 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 614 {
 615         struct bond_opt_value optval;
 616         int ret;
 617
 618         if (!rtnl_trylock())
 619                 return restart_syscall();
 620         bond_opt_initstr(&optval, buf);
 621         ret = __bond_opt_set(bond, option, &optval);
 622         rtnl_unlock();
 623
 624         return ret;
 625 }
 626
 627 /**
 628  * bond_opt_get - get a pointer to an option
 629  * @option: option for which to return a pointer
 630  *
 631  * This function checks if option is valid and if so returns a pointer
 632  * to its entry in the bond_opts[] option array.
 633  */
 634 const struct bond_option *bond_opt_get(unsigned int option)
 635 {
 636         if (!BOND_OPT_VALID(option))
 637                 return NULL;
 638
 639         return &bond_opts[option];
 640 }
 641
 642 int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval)
 643 {
 644         if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
 645                 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
 646                         bond->dev->name, newval->string);
 647                 /* disable arp monitoring */
 648                 bond->params.arp_interval = 0;
 649                 /* set miimon to default value */
 650                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 651                 pr_info("%s: Setting MII monitoring interval to %d\n",
 652                         bond->dev->name, bond->params.miimon);
 653         }
 654
 655         /* don't cache arp_validate between modes */
 656         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 657         bond->params.mode = newval->value;
 658
 659         return 0;
 660 }
 661
 662 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 663                                                          struct slave *slave)
 664 {
 665         return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
 666 }
 667
 668 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 669 {
 670         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 671
 672         return __bond_option_active_slave_get(bond, slave);
 673 }
 674
 675 struct net_device *bond_option_active_slave_get(struct bonding *bond)
 676 {
 677         return __bond_option_active_slave_get(bond, bond->curr_active_slave);
 678 }
 679
 680 static int bond_option_active_slave_set(struct bonding *bond,
 681                                         const struct bond_opt_value *newval)
 682 {
 683         char ifname[IFNAMSIZ] = { 0, };
 684         struct net_device *slave_dev;
 685         int ret = 0;
 686
 687         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 688         if (!strlen(ifname) || newval->string[0] == '\n') {
 689                 slave_dev = NULL;
 690         } else {
 691                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 692                 if (!slave_dev)
 693                         return -ENODEV;
 694         }
 695
 696         if (slave_dev) {
 697                 if (!netif_is_bond_slave(slave_dev)) {
 698                         pr_err("Device %s is not bonding slave\n",
 699                                slave_dev->name);
 700                         return -EINVAL;
 701                 }
 702
 703                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 704                         pr_err("%s: Device %s is not our slave\n",
 705                                bond->dev->name, slave_dev->name);
 706                         return -EINVAL;
 707                 }
 708         }
 709
 710         block_netpoll_tx();
 711         write_lock_bh(&bond->curr_slave_lock);
 712
 713         /* check to see if we are clearing active */
 714         if (!slave_dev) {
 715                 pr_info("%s: Clearing current active slave\n", bond->dev->name);
 716                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 717                 bond_select_active_slave(bond);
 718         } else {
 719                 struct slave *old_active = bond->curr_active_slave;
 720                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 721
 722                 BUG_ON(!new_active);
 723
 724                 if (new_active == old_active) {
 725                         /* do nothing */
 726                         pr_info("%s: %s is already the current active slave\n",
 727                                 bond->dev->name, new_active->dev->name);
 728                 } else {
 729                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 730                             IS_UP(new_active->dev)) {
 731                                 pr_info("%s: Setting %s as active slave\n",
 732                                         bond->dev->name, new_active->dev->name);
 733                                 bond_change_active_slave(bond, new_active);
 734                         } else {
 735                                 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n",
 736                                        bond->dev->name, new_active->dev->name,
 737                                        new_active->dev->name);
 738                                 ret = -EINVAL;
 739                         }
 740                 }
 741         }
 742
 743         write_unlock_bh(&bond->curr_slave_lock);
 744         unblock_netpoll_tx();
 745
 746         return ret;
 747 }
 748
 749 static int bond_option_miimon_set(struct bonding *bond,
 750                                   const struct bond_opt_value *newval)
 751 {
 752         pr_info("%s: Setting MII monitoring interval to %llu\n",
 753                 bond->dev->name, newval->value);
 754         bond->params.miimon = newval->value;
 755         if (bond->params.updelay)
 756                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 757                         bond->dev->name,
 758                         bond->params.updelay * bond->params.miimon);
 759         if (bond->params.downdelay)
 760                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 761                         bond->dev->name,
 762                         bond->params.downdelay * bond->params.miimon);
 763         if (newval->value && bond->params.arp_interval) {
 764                 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n",
 765                         bond->dev->name);
 766                 bond->params.arp_interval = 0;
 767                 if (bond->params.arp_validate)
 768                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 769         }
 770         if (bond->dev->flags & IFF_UP) {
 771                 /* If the interface is up, we may need to fire off
 772                  * the MII timer. If the interface is down, the
 773                  * timer will get fired off when the open function
 774                  * is called.
 775                  */
 776                 if (!newval->value) {
 777                         cancel_delayed_work_sync(&bond->mii_work);
 778                 } else {
 779                         cancel_delayed_work_sync(&bond->arp_work);
 780                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 781                 }
 782         }
 783
 784         return 0;
 785 }
 786
 787 static int bond_option_updelay_set(struct bonding *bond,
 788                                    const struct bond_opt_value *newval)
 789 {
 790         int value = newval->value;
 791
 792         if (!bond->params.miimon) {
 793                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 794                        bond->dev->name);
 795                 return -EPERM;
 796         }
 797         if ((value % bond->params.miimon) != 0) {
 798                 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 799                         bond->dev->name, value,
 800                         bond->params.miimon,
 801                         (value / bond->params.miimon) *
 802                         bond->params.miimon);
 803         }
 804         bond->params.updelay = value / bond->params.miimon;
 805         pr_info("%s: Setting up delay to %d\n",
 806                 bond->dev->name, bond->params.updelay * bond->params.miimon);
 807
 808         return 0;
 809 }
 810
 811 static int bond_option_downdelay_set(struct bonding *bond,
 812                                      const struct bond_opt_value *newval)
 813 {
 814         int value = newval->value;
 815
 816         if (!bond->params.miimon) {
 817                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 818                        bond->dev->name);
 819                 return -EPERM;
 820         }
 821         if ((value % bond->params.miimon) != 0) {
 822                 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 823                         bond->dev->name, value,
 824                         bond->params.miimon,
 825                         (value / bond->params.miimon) *
 826                         bond->params.miimon);
 827         }
 828         bond->params.downdelay = value / bond->params.miimon;
 829         pr_info("%s: Setting down delay to %d\n",
 830                 bond->dev->name, bond->params.downdelay * bond->params.miimon);
 831
 832         return 0;
 833 }
 834
 835 static int bond_option_use_carrier_set(struct bonding *bond,
 836                                        const struct bond_opt_value *newval)
 837 {
 838         pr_info("%s: Setting use_carrier to %llu\n",
 839                 bond->dev->name, newval->value);
 840         bond->params.use_carrier = newval->value;
 841
 842         return 0;
 843 }
 844
 845 static int bond_option_arp_interval_set(struct bonding *bond,
 846                                         const struct bond_opt_value *newval)
 847 {
 848         pr_info("%s: Setting ARP monitoring interval to %llu\n",
 849                 bond->dev->name, newval->value);
 850         bond->params.arp_interval = newval->value;
 851         if (newval->value) {
 852                 if (bond->params.miimon) {
 853                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n",
 854                                 bond->dev->name, bond->dev->name);
 855                         bond->params.miimon = 0;
 856                 }
 857                 if (!bond->params.arp_targets[0])
 858                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n",
 859                                 bond->dev->name);
 860         }
 861         if (bond->dev->flags & IFF_UP) {
 862                 /* If the interface is up, we may need to fire off
 863                  * the ARP timer.  If the interface is down, the
 864                  * timer will get fired off when the open function
 865                  * is called.
 866                  */
 867                 if (!newval->value) {
 868                         if (bond->params.arp_validate)
 869                                 bond->recv_probe = NULL;
 870                         cancel_delayed_work_sync(&bond->arp_work);
 871                 } else {
 872                         /* arp_validate can be set only in active-backup mode */
 873                         bond->recv_probe = bond_arp_rcv;
 874                         cancel_delayed_work_sync(&bond->mii_work);
 875                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 876                 }
 877         }
 878
 879         return 0;
 880 }
 881
 882 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 883                                             __be32 target,
 884                                             unsigned long last_rx)
 885 {
 886         __be32 *targets = bond->params.arp_targets;
 887         struct list_head *iter;
 888         struct slave *slave;
 889
 890         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 891                 bond_for_each_slave(bond, slave, iter)
 892                         slave->target_last_arp_rx[slot] = last_rx;
 893                 targets[slot] = target;
 894         }
 895 }
 896
 897 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 898 {
 899         __be32 *targets = bond->params.arp_targets;
 900         int ind;
 901
 902         if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
 903                 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 904                        bond->dev->name, &target);
 905                 return -EINVAL;
 906         }
 907
 908         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 909                 pr_err("%s: ARP target %pI4 is already present\n",
 910                        bond->dev->name, &target);
 911                 return -EINVAL;
 912         }
 913
 914         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 915         if (ind == -1) {
 916                 pr_err("%s: ARP target table is full!\n", bond->dev->name);
 917                 return -EINVAL;
 918         }
 919
 920         pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target);
 921
 922         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 923
 924         return 0;
 925 }
 926
 927 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 928 {
 929         int ret;
 930
 931         /* not to race with bond_arp_rcv */
 932         write_lock_bh(&bond->lock);
 933         ret = _bond_option_arp_ip_target_add(bond, target);
 934         write_unlock_bh(&bond->lock);
 935
 936         return ret;
 937 }
 938
 939 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 940 {
 941         __be32 *targets = bond->params.arp_targets;
 942         struct list_head *iter;
 943         struct slave *slave;
 944         unsigned long *targets_rx;
 945         int ind, i;
 946
 947         if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
 948                 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 949                        bond->dev->name, &target);
 950                 return -EINVAL;
 951         }
 952
 953         ind = bond_get_targets_ip(targets, target);
 954         if (ind == -1) {
 955                 pr_err("%s: unable to remove nonexistent ARP target %pI4\n",
 956                        bond->dev->name, &target);
 957                 return -EINVAL;
 958         }
 959
 960         if (ind == 0 && !targets[1] && bond->params.arp_interval)
 961                 pr_warn("%s: Removing last arp target with arp_interval on\n",
 962                         bond->dev->name);
 963
 964         pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target);
 965
 966         /* not to race with bond_arp_rcv */
 967         write_lock_bh(&bond->lock);
 968
 969         bond_for_each_slave(bond, slave, iter) {
 970                 targets_rx = slave->target_last_arp_rx;
 971                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 972                         targets_rx[i] = targets_rx[i+1];
 973                 targets_rx[i] = 0;
 974         }
 975         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 976                 targets[i] = targets[i+1];
 977         targets[i] = 0;
 978
 979         write_unlock_bh(&bond->lock);
 980
 981         return 0;
 982 }
 983
 984 void bond_option_arp_ip_targets_clear(struct bonding *bond)
 985 {
 986         int i;
 987
 988         /* not to race with bond_arp_rcv */
 989         write_lock_bh(&bond->lock);
 990         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 991                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
 992         write_unlock_bh(&bond->lock);
 993 }
 994
 995 static int bond_option_arp_ip_targets_set(struct bonding *bond,
 996                                           const struct bond_opt_value *newval)
 997 {
 998         int ret = -EPERM;
 999         __be32 target;
1000
1001         if (newval->string) {
1002                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1003                         pr_err("%s: invalid ARP target %pI4 specified\n",
1004                                bond->dev->name, &target);
1005                         return ret;
1006                 }
1007                 if (newval->string[0] == '+')
1008                         ret = bond_option_arp_ip_target_add(bond, target);
1009                 else if (newval->string[0] == '-')
1010                         ret = bond_option_arp_ip_target_rem(bond, target);
1011                 else
1012                         pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n",
1013                                bond->dev->name);
1014         } else {
1015                 target = newval->value;
1016                 ret = bond_option_arp_ip_target_add(bond, target);
1017         }
1018
1019         return ret;
1020 }
1021
1022 static int bond_option_arp_validate_set(struct bonding *bond,
1023                                         const struct bond_opt_value *newval)
1024 {
1025         pr_info("%s: Setting arp_validate to %s (%llu)\n",
1026                 bond->dev->name, newval->string, newval->value);
1027
1028         if (bond->dev->flags & IFF_UP) {
1029                 if (!newval->value)
1030                         bond->recv_probe = NULL;
1031                 else if (bond->params.arp_interval)
1032                         bond->recv_probe = bond_arp_rcv;
1033         }
1034         bond->params.arp_validate = newval->value;
1035
1036         return 0;
1037 }
1038
1039 static int bond_option_arp_all_targets_set(struct bonding *bond,
1040                                            const struct bond_opt_value *newval)
1041 {
1042         pr_info("%s: Setting arp_all_targets to %s (%llu)\n",
1043                 bond->dev->name, newval->string, newval->value);
1044         bond->params.arp_all_targets = newval->value;
1045
1046         return 0;
1047 }
1048
1049 static int bond_option_primary_set(struct bonding *bond,
1050                                    const struct bond_opt_value *newval)
1051 {
1052         char *p, *primary = newval->string;
1053         struct list_head *iter;
1054         struct slave *slave;
1055
1056         block_netpoll_tx();
1057         read_lock(&bond->lock);
1058         write_lock_bh(&bond->curr_slave_lock);
1059
1060         p = strchr(primary, '\n');
1061         if (p)
1062                 *p = '\0';
1063         /* check to see if we are clearing primary */
1064         if (!strlen(primary)) {
1065                 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1066                 bond->primary_slave = NULL;
1067                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1068                 bond_select_active_slave(bond);
1069                 goto out;
1070         }
1071
1072         bond_for_each_slave(bond, slave, iter) {
1073                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1074                         pr_info("%s: Setting %s as primary slave\n",
1075                                 bond->dev->name, slave->dev->name);
1076                         bond->primary_slave = slave;
1077                         strcpy(bond->params.primary, slave->dev->name);
1078                         bond_select_active_slave(bond);
1079                         goto out;
1080                 }
1081         }
1082
1083         if (bond->primary_slave) {
1084                 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1085                 bond->primary_slave = NULL;
1086                 bond_select_active_slave(bond);
1087         }
1088         strncpy(bond->params.primary, primary, IFNAMSIZ);
1089         bond->params.primary[IFNAMSIZ - 1] = 0;
1090
1091         pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n",
1092                 bond->dev->name, primary, bond->dev->name);
1093
1094 out:
1095         write_unlock_bh(&bond->curr_slave_lock);
1096         read_unlock(&bond->lock);
1097         unblock_netpoll_tx();
1098
1099         return 0;
1100 }
1101
1102 static int bond_option_primary_reselect_set(struct bonding *bond,
1103                                             const struct bond_opt_value *newval)
1104 {
1105         pr_info("%s: Setting primary_reselect to %s (%llu)\n",
1106                 bond->dev->name, newval->string, newval->value);
1107         bond->params.primary_reselect = newval->value;
1108
1109         block_netpoll_tx();
1110         write_lock_bh(&bond->curr_slave_lock);
1111         bond_select_active_slave(bond);
1112         write_unlock_bh(&bond->curr_slave_lock);
1113         unblock_netpoll_tx();
1114
1115         return 0;
1116 }
1117
1118 static int bond_option_fail_over_mac_set(struct bonding *bond,
1119                                          const struct bond_opt_value *newval)
1120 {
1121         pr_info("%s: Setting fail_over_mac to %s (%llu)\n",
1122                 bond->dev->name, newval->string, newval->value);
1123         bond->params.fail_over_mac = newval->value;
1124
1125         return 0;
1126 }
1127
1128 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1129                                             const struct bond_opt_value *newval)
1130 {
1131         pr_info("%s: Setting xmit hash policy to %s (%llu)\n",
1132                 bond->dev->name, newval->string, newval->value);
1133         bond->params.xmit_policy = newval->value;
1134
1135         return 0;
1136 }
1137
1138 static int bond_option_resend_igmp_set(struct bonding *bond,
1139                                        const struct bond_opt_value *newval)
1140 {
1141         pr_info("%s: Setting resend_igmp to %llu\n",
1142                 bond->dev->name, newval->value);
1143         bond->params.resend_igmp = newval->value;
1144
1145         return 0;
1146 }
1147
1148 static int bond_option_num_peer_notif_set(struct bonding *bond,
1149                                    const struct bond_opt_value *newval)
1150 {
1151         bond->params.num_peer_notif = newval->value;
1152
1153         return 0;
1154 }
1155
1156 static int bond_option_all_slaves_active_set(struct bonding *bond,
1157                                              const struct bond_opt_value *newval)
1158 {
1159         struct list_head *iter;
1160         struct slave *slave;
1161
1162         if (newval->value == bond->params.all_slaves_active)
1163                 return 0;
1164         bond->params.all_slaves_active = newval->value;
1165         bond_for_each_slave(bond, slave, iter) {
1166                 if (!bond_is_active_slave(slave)) {
1167                         if (newval->value)
1168                                 slave->inactive = 0;
1169                         else
1170                                 slave->inactive = 1;
1171                 }
1172         }
1173
1174         return 0;
1175 }
1176
1177 static int bond_option_min_links_set(struct bonding *bond,
1178                                      const struct bond_opt_value *newval)
1179 {
1180         pr_info("%s: Setting min links value to %llu\n",
1181                 bond->dev->name, newval->value);
1182         bond->params.min_links = newval->value;
1183
1184         return 0;
1185 }
1186
1187 static int bond_option_lp_interval_set(struct bonding *bond,
1188                                        const struct bond_opt_value *newval)
1189 {
1190         bond->params.lp_interval = newval->value;
1191
1192         return 0;
1193 }
1194
1195 static int bond_option_pps_set(struct bonding *bond,
1196                                const struct bond_opt_value *newval)
1197 {
1198         bond->params.packets_per_slave = newval->value;
1199         if (newval->value > 0) {
1200                 bond->params.reciprocal_packets_per_slave =
1201                         reciprocal_value(newval->value);
1202         } else {
1203                 /* reciprocal_packets_per_slave is unused if
1204                  * packets_per_slave is 0 or 1, just initialize it
1205                  */
1206                 bond->params.reciprocal_packets_per_slave =
1207                         (struct reciprocal_value) { 0 };
1208         }
1209
1210         return 0;
1211 }
1212
1213 static int bond_option_lacp_rate_set(struct bonding *bond,
1214                                      const struct bond_opt_value *newval)
1215 {
1216         pr_info("%s: Setting LACP rate to %s (%llu)\n",
1217                 bond->dev->name, newval->string, newval->value);
1218         bond->params.lacp_fast = newval->value;
1219         bond_3ad_update_lacp_rate(bond);
1220
1221         return 0;
1222 }
1223
1224 static int bond_option_ad_select_set(struct bonding *bond,
1225                                      const struct bond_opt_value *newval)
1226 {
1227         pr_info("%s: Setting ad_select to %s (%llu)\n",
1228                 bond->dev->name, newval->string, newval->value);
1229         bond->params.ad_select = newval->value;
1230
1231         return 0;
1232 }
1233
1234 static int bond_option_queue_id_set(struct bonding *bond,
1235                                     const struct bond_opt_value *newval)
1236 {
1237         struct slave *slave, *update_slave;
1238         struct net_device *sdev;
1239         struct list_head *iter;
1240         char *delim;
1241         int ret = 0;
1242         u16 qid;
1243
1244         /* delim will point to queue id if successful */
1245         delim = strchr(newval->string, ':');
1246         if (!delim)
1247                 goto err_no_cmd;
1248
1249         /* Terminate string that points to device name and bump it
1250          * up one, so we can read the queue id there.
1251          */
1252         *delim = '\0';
1253         if (sscanf(++delim, "%hd\n", &qid) != 1)
1254                 goto err_no_cmd;
1255
1256         /* Check buffer length, valid ifname and queue id */
1257         if (!dev_valid_name(newval->string) ||
1258             qid > bond->dev->real_num_tx_queues)
1259                 goto err_no_cmd;
1260
1261         /* Get the pointer to that interface if it exists */
1262         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1263         if (!sdev)
1264                 goto err_no_cmd;
1265
1266         /* Search for thes slave and check for duplicate qids */
1267         update_slave = NULL;
1268         bond_for_each_slave(bond, slave, iter) {
1269                 if (sdev == slave->dev)
1270                         /* We don't need to check the matching
1271                          * slave for dups, since we're overwriting it
1272                          */
1273                         update_slave = slave;
1274                 else if (qid && qid == slave->queue_id) {
1275                         goto err_no_cmd;
1276                 }
1277         }
1278
1279         if (!update_slave)
1280                 goto err_no_cmd;
1281
1282         /* Actually set the qids for the slave */
1283         update_slave->queue_id = qid;
1284
1285 out:
1286         return ret;
1287
1288 err_no_cmd:
1289         pr_info("invalid input for queue_id set for %s\n", bond->dev->name);
1290         ret = -EPERM;
1291         goto out;
1292
1293 }
1294
1295 static int bond_option_slaves_set(struct bonding *bond,
1296                                   const struct bond_opt_value *newval)
1297 {
1298         char command[IFNAMSIZ + 1] = { 0, };
1299         struct net_device *dev;
1300         char *ifname;
1301         int ret;
1302
1303         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1304         ifname = command + 1;
1305         if ((strlen(command) <= 1) ||
1306             !dev_valid_name(ifname))
1307                 goto err_no_cmd;
1308
1309         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1310         if (!dev) {
1311                 pr_info("%s: interface %s does not exist!\n",
1312                         bond->dev->name, ifname);
1313                 ret = -ENODEV;
1314                 goto out;
1315         }
1316
1317         switch (command[0]) {
1318         case '+':
1319                 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name);
1320                 ret = bond_enslave(bond->dev, dev);
1321                 break;
1322
1323         case '-':
1324                 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name);
1325                 ret = bond_release(bond->dev, dev);
1326                 break;
1327
1328         default:
1329                 goto err_no_cmd;
1330         }
1331
1332 out:
1333         return ret;
1334
1335 err_no_cmd:
1336         pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n",
1337                bond->dev->name);
1338         ret = -EPERM;
1339         goto out;
1340 }