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 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  74                                   const struct bond_opt_value *newval);
  75
  76
  77 static const struct bond_opt_value bond_mode_tbl[] = {
  78         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  79         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  80         { "balance-xor",   BOND_MODE_XOR,          0},
  81         { "broadcast",     BOND_MODE_BROADCAST,    0},
  82         { "802.3ad",       BOND_MODE_8023AD,       0},
  83         { "balance-tlb",   BOND_MODE_TLB,          0},
  84         { "balance-alb",   BOND_MODE_ALB,          0},
  85         { NULL,            -1,                     0},
  86 };
  87
  88 static const struct bond_opt_value bond_pps_tbl[] = {
  89         { "default", 1,         BOND_VALFLAG_DEFAULT},
  90         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  91         { NULL,      -1,        0},
  92 };
  93
  94 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  95         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
  96         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
  97         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
  98         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
  99         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
 100         { NULL,       -1,                       0},
 101 };
 102
 103 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 104         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 105         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 106         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 107         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 108         { "filter",             BOND_ARP_FILTER,                0},
 109         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 110         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 111         { NULL,                 -1,                             0},
 112 };
 113
 114 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 115         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 116         { "all", BOND_ARP_TARGETS_ALL, 0},
 117         { NULL,  -1,                   0},
 118 };
 119
 120 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 121         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 122         { "active", BOND_FOM_ACTIVE, 0},
 123         { "follow", BOND_FOM_FOLLOW, 0},
 124         { NULL,     -1,              0},
 125 };
 126
 127 static const struct bond_opt_value bond_intmax_tbl[] = {
 128         { "off",     0,       BOND_VALFLAG_DEFAULT},
 129         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 130         { NULL,      -1,      0}
 131 };
 132
 133 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 134         { "slow", AD_LACP_SLOW, 0},
 135         { "fast", AD_LACP_FAST, 0},
 136         { NULL,   -1,           0},
 137 };
 138
 139 static const struct bond_opt_value bond_ad_select_tbl[] = {
 140         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 141         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 142         { "count",     BOND_AD_COUNT,     0},
 143         { NULL,        -1,                0},
 144 };
 145
 146 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 147         { "off",     0,   0},
 148         { "maxval",  255, BOND_VALFLAG_MAX},
 149         { "default", 1,   BOND_VALFLAG_DEFAULT},
 150         { NULL,      -1,  0}
 151 };
 152
 153 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 154         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 155         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 156         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 157         { NULL,      -1},
 158 };
 159
 160 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 161         { "off", 0,  0},
 162         { "on",  1,  BOND_VALFLAG_DEFAULT},
 163         { NULL,  -1, 0}
 164 };
 165
 166 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 167         { "off", 0,  BOND_VALFLAG_DEFAULT},
 168         { "on",  1,  0},
 169         { NULL,  -1, 0}
 170 };
 171
 172 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 173         { "off",     0,   0},
 174         { "maxval",  255, BOND_VALFLAG_MAX},
 175         { "default", 1,   BOND_VALFLAG_DEFAULT},
 176         { NULL,      -1,  0}
 177 };
 178
 179 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 180         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 181         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 182         { NULL,      -1,      0},
 183 };
 184
 185 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 186         { "off", 0,  0},
 187         { "on",  1,  BOND_VALFLAG_DEFAULT},
 188         { NULL,  -1, 0}
 189 };
 190
 191 static const struct bond_option bond_opts[] = {
 192         [BOND_OPT_MODE] = {
 193                 .id = BOND_OPT_MODE,
 194                 .name = "mode",
 195                 .desc = "bond device mode",
 196                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 197                 .values = bond_mode_tbl,
 198                 .set = bond_option_mode_set
 199         },
 200         [BOND_OPT_PACKETS_PER_SLAVE] = {
 201                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 202                 .name = "packets_per_slave",
 203                 .desc = "Packets to send per slave in RR mode",
 204                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 205                 .values = bond_pps_tbl,
 206                 .set = bond_option_pps_set
 207         },
 208         [BOND_OPT_XMIT_HASH] = {
 209                 .id = BOND_OPT_XMIT_HASH,
 210                 .name = "xmit_hash_policy",
 211                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 212                 .values = bond_xmit_hashtype_tbl,
 213                 .set = bond_option_xmit_hash_policy_set
 214         },
 215         [BOND_OPT_ARP_VALIDATE] = {
 216                 .id = BOND_OPT_ARP_VALIDATE,
 217                 .name = "arp_validate",
 218                 .desc = "validate src/dst of ARP probes",
 219                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 220                                BIT(BOND_MODE_ALB),
 221                 .values = bond_arp_validate_tbl,
 222                 .set = bond_option_arp_validate_set
 223         },
 224         [BOND_OPT_ARP_ALL_TARGETS] = {
 225                 .id = BOND_OPT_ARP_ALL_TARGETS,
 226                 .name = "arp_all_targets",
 227                 .desc = "fail on any/all arp targets timeout",
 228                 .values = bond_arp_all_targets_tbl,
 229                 .set = bond_option_arp_all_targets_set
 230         },
 231         [BOND_OPT_FAIL_OVER_MAC] = {
 232                 .id = BOND_OPT_FAIL_OVER_MAC,
 233                 .name = "fail_over_mac",
 234                 .desc = "For active-backup, do not set all slaves to the same MAC",
 235                 .flags = BOND_OPTFLAG_NOSLAVES,
 236                 .values = bond_fail_over_mac_tbl,
 237                 .set = bond_option_fail_over_mac_set
 238         },
 239         [BOND_OPT_ARP_INTERVAL] = {
 240                 .id = BOND_OPT_ARP_INTERVAL,
 241                 .name = "arp_interval",
 242                 .desc = "arp interval in milliseconds",
 243                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 244                                BIT(BOND_MODE_ALB),
 245                 .values = bond_intmax_tbl,
 246                 .set = bond_option_arp_interval_set
 247         },
 248         [BOND_OPT_ARP_TARGETS] = {
 249                 .id = BOND_OPT_ARP_TARGETS,
 250                 .name = "arp_ip_target",
 251                 .desc = "arp targets in n.n.n.n form",
 252                 .flags = BOND_OPTFLAG_RAWVAL,
 253                 .set = bond_option_arp_ip_targets_set
 254         },
 255         [BOND_OPT_DOWNDELAY] = {
 256                 .id = BOND_OPT_DOWNDELAY,
 257                 .name = "downdelay",
 258                 .desc = "Delay before considering link down, in milliseconds",
 259                 .values = bond_intmax_tbl,
 260                 .set = bond_option_downdelay_set
 261         },
 262         [BOND_OPT_UPDELAY] = {
 263                 .id = BOND_OPT_UPDELAY,
 264                 .name = "updelay",
 265                 .desc = "Delay before considering link up, in milliseconds",
 266                 .values = bond_intmax_tbl,
 267                 .set = bond_option_updelay_set
 268         },
 269         [BOND_OPT_LACP_RATE] = {
 270                 .id = BOND_OPT_LACP_RATE,
 271                 .name = "lacp_rate",
 272                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 273                 .flags = BOND_OPTFLAG_IFDOWN,
 274                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 275                 .values = bond_lacp_rate_tbl,
 276                 .set = bond_option_lacp_rate_set
 277         },
 278         [BOND_OPT_MINLINKS] = {
 279                 .id = BOND_OPT_MINLINKS,
 280                 .name = "min_links",
 281                 .desc = "Minimum number of available links before turning on carrier",
 282                 .values = bond_intmax_tbl,
 283                 .set = bond_option_min_links_set
 284         },
 285         [BOND_OPT_AD_SELECT] = {
 286                 .id = BOND_OPT_AD_SELECT,
 287                 .name = "ad_select",
 288                 .desc = "803.ad aggregation selection logic",
 289                 .flags = BOND_OPTFLAG_IFDOWN,
 290                 .values = bond_ad_select_tbl,
 291                 .set = bond_option_ad_select_set
 292         },
 293         [BOND_OPT_NUM_PEER_NOTIF] = {
 294                 .id = BOND_OPT_NUM_PEER_NOTIF,
 295                 .name = "num_unsol_na",
 296                 .desc = "Number of peer notifications to send on failover event",
 297                 .values = bond_num_peer_notif_tbl,
 298                 .set = bond_option_num_peer_notif_set
 299         },
 300         [BOND_OPT_MIIMON] = {
 301                 .id = BOND_OPT_MIIMON,
 302                 .name = "miimon",
 303                 .desc = "Link check interval in milliseconds",
 304                 .values = bond_intmax_tbl,
 305                 .set = bond_option_miimon_set
 306         },
 307         [BOND_OPT_PRIMARY] = {
 308                 .id = BOND_OPT_PRIMARY,
 309                 .name = "primary",
 310                 .desc = "Primary network device to use",
 311                 .flags = BOND_OPTFLAG_RAWVAL,
 312                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 313                                                 BIT(BOND_MODE_TLB) |
 314                                                 BIT(BOND_MODE_ALB)),
 315                 .set = bond_option_primary_set
 316         },
 317         [BOND_OPT_PRIMARY_RESELECT] = {
 318                 .id = BOND_OPT_PRIMARY_RESELECT,
 319                 .name = "primary_reselect",
 320                 .desc = "Reselect primary slave once it comes up",
 321                 .values = bond_primary_reselect_tbl,
 322                 .set = bond_option_primary_reselect_set
 323         },
 324         [BOND_OPT_USE_CARRIER] = {
 325                 .id = BOND_OPT_USE_CARRIER,
 326                 .name = "use_carrier",
 327                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 328                 .values = bond_use_carrier_tbl,
 329                 .set = bond_option_use_carrier_set
 330         },
 331         [BOND_OPT_ACTIVE_SLAVE] = {
 332                 .id = BOND_OPT_ACTIVE_SLAVE,
 333                 .name = "active_slave",
 334                 .desc = "Currently active slave",
 335                 .flags = BOND_OPTFLAG_RAWVAL,
 336                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 337                                                 BIT(BOND_MODE_TLB) |
 338                                                 BIT(BOND_MODE_ALB)),
 339                 .set = bond_option_active_slave_set
 340         },
 341         [BOND_OPT_QUEUE_ID] = {
 342                 .id = BOND_OPT_QUEUE_ID,
 343                 .name = "queue_id",
 344                 .desc = "Set queue id of a slave",
 345                 .flags = BOND_OPTFLAG_RAWVAL,
 346                 .set = bond_option_queue_id_set
 347         },
 348         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 349                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 350                 .name = "all_slaves_active",
 351                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 352                 .values = bond_all_slaves_active_tbl,
 353                 .set = bond_option_all_slaves_active_set
 354         },
 355         [BOND_OPT_RESEND_IGMP] = {
 356                 .id = BOND_OPT_RESEND_IGMP,
 357                 .name = "resend_igmp",
 358                 .desc = "Number of IGMP membership reports to send on link failure",
 359                 .values = bond_resend_igmp_tbl,
 360                 .set = bond_option_resend_igmp_set
 361         },
 362         [BOND_OPT_LP_INTERVAL] = {
 363                 .id = BOND_OPT_LP_INTERVAL,
 364                 .name = "lp_interval",
 365                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 366                 .values = bond_lp_interval_tbl,
 367                 .set = bond_option_lp_interval_set
 368         },
 369         [BOND_OPT_SLAVES] = {
 370                 .id = BOND_OPT_SLAVES,
 371                 .name = "slaves",
 372                 .desc = "Slave membership management",
 373                 .flags = BOND_OPTFLAG_RAWVAL,
 374                 .set = bond_option_slaves_set
 375         },
 376         [BOND_OPT_TLB_DYNAMIC_LB] = {
 377                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 378                 .name = "tlb_dynamic_lb",
 379                 .desc = "Enable dynamic flow shuffling",
 380                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
 381                 .values = bond_tlb_dynamic_lb_tbl,
 382                 .flags = BOND_OPTFLAG_IFDOWN,
 383                 .set = bond_option_tlb_dynamic_lb_set,
 384         },
 385         { }
 386 };
 387
 388 /* Searches for an option by name */
 389 const struct bond_option *bond_opt_get_by_name(const char *name)
 390 {
 391         const struct bond_option *opt;
 392         int option;
 393
 394         for (option = 0; option < BOND_OPT_LAST; option++) {
 395                 opt = bond_opt_get(option);
 396                 if (opt && !strcmp(opt->name, name))
 397                         return opt;
 398         }
 399
 400         return NULL;
 401 }
 402
 403 /* Searches for a value in opt's values[] table */
 404 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 405 {
 406         const struct bond_option *opt;
 407         int i;
 408
 409         opt = bond_opt_get(option);
 410         if (WARN_ON(!opt))
 411                 return NULL;
 412         for (i = 0; opt->values && opt->values[i].string; i++)
 413                 if (opt->values[i].value == val)
 414                         return &opt->values[i];
 415
 416         return NULL;
 417 }
 418
 419 /* Searches for a value in opt's values[] table which matches the flagmask */
 420 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 421                                                  u32 flagmask)
 422 {
 423         int i;
 424
 425         for (i = 0; opt->values && opt->values[i].string; i++)
 426                 if (opt->values[i].flags & flagmask)
 427                         return &opt->values[i];
 428
 429         return NULL;
 430 }
 431
 432 /* If maxval is missing then there's no range to check. In case minval is
 433  * missing then it's considered to be 0.
 434  */
 435 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 436 {
 437         const struct bond_opt_value *minval, *maxval;
 438
 439         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 440         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 441         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 442                 return false;
 443
 444         return true;
 445 }
 446
 447 /**
 448  * bond_opt_parse - parse option value
 449  * @opt: the option to parse against
 450  * @val: value to parse
 451  *
 452  * This function tries to extract the value from @val and check if it's
 453  * a possible match for the option and returns NULL if a match isn't found,
 454  * or the struct_opt_value that matched. It also strips the new line from
 455  * @val->string if it's present.
 456  */
 457 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 458                                             struct bond_opt_value *val)
 459 {
 460         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 461         const struct bond_opt_value *tbl;
 462         const struct bond_opt_value *ret = NULL;
 463         bool checkval;
 464         int i, rv;
 465
 466         /* No parsing if the option wants a raw val */
 467         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 468                 return val;
 469
 470         tbl = opt->values;
 471         if (!tbl)
 472                 goto out;
 473
 474         /* ULLONG_MAX is used to bypass string processing */
 475         checkval = val->value != ULLONG_MAX;
 476         if (!checkval) {
 477                 if (!val->string)
 478                         goto out;
 479                 p = strchr(val->string, '\n');
 480                 if (p)
 481                         *p = '\0';
 482                 for (p = val->string; *p; p++)
 483                         if (!(isdigit(*p) || isspace(*p)))
 484                                 break;
 485                 /* The following code extracts the string to match or the value
 486                  * and sets checkval appropriately
 487                  */
 488                 if (*p) {
 489                         rv = sscanf(val->string, "%32s", valstr);
 490                 } else {
 491                         rv = sscanf(val->string, "%llu", &val->value);
 492                         checkval = true;
 493                 }
 494                 if (!rv)
 495                         goto out;
 496         }
 497
 498         for (i = 0; tbl[i].string; i++) {
 499                 /* Check for exact match */
 500                 if (checkval) {
 501                         if (val->value == tbl[i].value)
 502                                 ret = &tbl[i];
 503                 } else {
 504                         if (!strcmp(valstr, "default") &&
 505                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 506                                 ret = &tbl[i];
 507
 508                         if (!strcmp(valstr, tbl[i].string))
 509                                 ret = &tbl[i];
 510                 }
 511                 /* Found an exact match */
 512                 if (ret)
 513                         goto out;
 514         }
 515         /* Possible range match */
 516         if (checkval && bond_opt_check_range(opt, val->value))
 517                 ret = val;
 518 out:
 519         return ret;
 520 }
 521
 522 /* Check opt's dependencies against bond mode and currently set options */
 523 static int bond_opt_check_deps(struct bonding *bond,
 524                                const struct bond_option *opt)
 525 {
 526         struct bond_params *params = &bond->params;
 527
 528         if (test_bit(params->mode, &opt->unsuppmodes))
 529                 return -EACCES;
 530         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 531                 return -ENOTEMPTY;
 532         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 533                 return -EBUSY;
 534
 535         return 0;
 536 }
 537
 538 static void bond_opt_dep_print(struct bonding *bond,
 539                                const struct bond_option *opt)
 540 {
 541         const struct bond_opt_value *modeval;
 542         struct bond_params *params;
 543
 544         params = &bond->params;
 545         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 546         if (test_bit(params->mode, &opt->unsuppmodes))
 547                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 548                            opt->name, modeval->string, modeval->value);
 549 }
 550
 551 static void bond_opt_error_interpret(struct bonding *bond,
 552                                      const struct bond_option *opt,
 553                                      int error, const struct bond_opt_value *val)
 554 {
 555         const struct bond_opt_value *minval, *maxval;
 556         char *p;
 557
 558         switch (error) {
 559         case -EINVAL:
 560                 if (val) {
 561                         if (val->string) {
 562                                 /* sometimes RAWVAL opts may have new lines */
 563                                 p = strchr(val->string, '\n');
 564                                 if (p)
 565                                         *p = '\0';
 566                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 567                                            opt->name, val->string);
 568                         } else {
 569                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 570                                            opt->name, val->value);
 571                         }
 572                 }
 573                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 574                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 575                 if (!maxval)
 576                         break;
 577                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 578                            opt->name, minval ? minval->value : 0, maxval->value);
 579                 break;
 580         case -EACCES:
 581                 bond_opt_dep_print(bond, opt);
 582                 break;
 583         case -ENOTEMPTY:
 584                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 585                            opt->name);
 586                 break;
 587         case -EBUSY:
 588                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 589                            opt->name);
 590                 break;
 591         default:
 592                 break;
 593         }
 594 }
 595
 596 /**
 597  * __bond_opt_set - set a bonding option
 598  * @bond: target bond device
 599  * @option: option to set
 600  * @val: value to set it to
 601  *
 602  * This function is used to change the bond's option value, it can be
 603  * used for both enabling/changing an option and for disabling it. RTNL lock
 604  * must be obtained before calling this function.
 605  */
 606 int __bond_opt_set(struct bonding *bond,
 607                    unsigned int option, struct bond_opt_value *val)
 608 {
 609         const struct bond_opt_value *retval = NULL;
 610         const struct bond_option *opt;
 611         int ret = -ENOENT;
 612
 613         ASSERT_RTNL();
 614
 615         opt = bond_opt_get(option);
 616         if (WARN_ON(!val) || WARN_ON(!opt))
 617                 goto out;
 618         ret = bond_opt_check_deps(bond, opt);
 619         if (ret)
 620                 goto out;
 621         retval = bond_opt_parse(opt, val);
 622         if (!retval) {
 623                 ret = -EINVAL;
 624                 goto out;
 625         }
 626         ret = opt->set(bond, retval);
 627 out:
 628         if (ret)
 629                 bond_opt_error_interpret(bond, opt, ret, val);
 630
 631         return ret;
 632 }
 633
 634 /**
 635  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 636  * @bond: target bond device
 637  * @option: option to set
 638  * @buf: value to set it to
 639  *
 640  * This function tries to acquire RTNL without blocking and if successful
 641  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 642  */
 643 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 644 {
 645         struct bond_opt_value optval;
 646         int ret;
 647
 648         if (!rtnl_trylock())
 649                 return restart_syscall();
 650         bond_opt_initstr(&optval, buf);
 651         ret = __bond_opt_set(bond, option, &optval);
 652         rtnl_unlock();
 653
 654         return ret;
 655 }
 656
 657 /**
 658  * bond_opt_get - get a pointer to an option
 659  * @option: option for which to return a pointer
 660  *
 661  * This function checks if option is valid and if so returns a pointer
 662  * to its entry in the bond_opts[] option array.
 663  */
 664 const struct bond_option *bond_opt_get(unsigned int option)
 665 {
 666         if (!BOND_OPT_VALID(option))
 667                 return NULL;
 668
 669         return &bond_opts[option];
 670 }
 671
 672 static int bond_option_mode_set(struct bonding *bond,
 673                                 const struct bond_opt_value *newval)
 674 {
 675         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 676                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 677                             newval->string);
 678                 /* disable arp monitoring */
 679                 bond->params.arp_interval = 0;
 680                 /* set miimon to default value */
 681                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 682                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 683                             bond->params.miimon);
 684         }
 685
 686         /* don't cache arp_validate between modes */
 687         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 688         bond->params.mode = newval->value;
 689
 690         return 0;
 691 }
 692
 693 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 694                                                          struct slave *slave)
 695 {
 696         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 697 }
 698
 699 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 700 {
 701         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 702
 703         return __bond_option_active_slave_get(bond, slave);
 704 }
 705
 706 static int bond_option_active_slave_set(struct bonding *bond,
 707                                         const struct bond_opt_value *newval)
 708 {
 709         char ifname[IFNAMSIZ] = { 0, };
 710         struct net_device *slave_dev;
 711         int ret = 0;
 712
 713         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 714         if (!strlen(ifname) || newval->string[0] == '\n') {
 715                 slave_dev = NULL;
 716         } else {
 717                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 718                 if (!slave_dev)
 719                         return -ENODEV;
 720         }
 721
 722         if (slave_dev) {
 723                 if (!netif_is_bond_slave(slave_dev)) {
 724                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 725                                    slave_dev->name);
 726                         return -EINVAL;
 727                 }
 728
 729                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 730                         netdev_err(bond->dev, "Device %s is not our slave\n",
 731                                    slave_dev->name);
 732                         return -EINVAL;
 733                 }
 734         }
 735
 736         block_netpoll_tx();
 737         write_lock_bh(&bond->curr_slave_lock);
 738
 739         /* check to see if we are clearing active */
 740         if (!slave_dev) {
 741                 netdev_info(bond->dev, "Clearing current active slave\n");
 742                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 743                 bond_select_active_slave(bond);
 744         } else {
 745                 struct slave *old_active = bond_deref_active_protected(bond);
 746                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 747
 748                 BUG_ON(!new_active);
 749
 750                 if (new_active == old_active) {
 751                         /* do nothing */
 752                         netdev_info(bond->dev, "%s is already the current active slave\n",
 753                                     new_active->dev->name);
 754                 } else {
 755                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 756                             bond_slave_is_up(new_active)) {
 757                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 758                                             new_active->dev->name);
 759                                 bond_change_active_slave(bond, new_active);
 760                         } else {
 761                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 762                                            new_active->dev->name,
 763                                            new_active->dev->name);
 764                                 ret = -EINVAL;
 765                         }
 766                 }
 767         }
 768
 769         write_unlock_bh(&bond->curr_slave_lock);
 770         unblock_netpoll_tx();
 771
 772         return ret;
 773 }
 774
 775 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 776  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 777  * start it.
 778  */
 779 static int bond_option_miimon_set(struct bonding *bond,
 780                                   const struct bond_opt_value *newval)
 781 {
 782         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 783                     newval->value);
 784         bond->params.miimon = newval->value;
 785         if (bond->params.updelay)
 786                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 787                         bond->params.updelay * bond->params.miimon);
 788         if (bond->params.downdelay)
 789                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 790                             bond->params.downdelay * bond->params.miimon);
 791         if (newval->value && bond->params.arp_interval) {
 792                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 793                 bond->params.arp_interval = 0;
 794                 if (bond->params.arp_validate)
 795                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 796         }
 797         if (bond->dev->flags & IFF_UP) {
 798                 /* If the interface is up, we may need to fire off
 799                  * the MII timer. If the interface is down, the
 800                  * timer will get fired off when the open function
 801                  * is called.
 802                  */
 803                 if (!newval->value) {
 804                         cancel_delayed_work_sync(&bond->mii_work);
 805                 } else {
 806                         cancel_delayed_work_sync(&bond->arp_work);
 807                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 808                 }
 809         }
 810
 811         return 0;
 812 }
 813
 814 /* Set up and down delays. These must be multiples of the
 815  * MII monitoring value, and are stored internally as the multiplier.
 816  * Thus, we must translate to MS for the real world.
 817  */
 818 static int bond_option_updelay_set(struct bonding *bond,
 819                                    const struct bond_opt_value *newval)
 820 {
 821         int value = newval->value;
 822
 823         if (!bond->params.miimon) {
 824                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 825                 return -EPERM;
 826         }
 827         if ((value % bond->params.miimon) != 0) {
 828                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 829                             value, bond->params.miimon,
 830                             (value / bond->params.miimon) *
 831                             bond->params.miimon);
 832         }
 833         bond->params.updelay = value / bond->params.miimon;
 834         netdev_info(bond->dev, "Setting up delay to %d\n",
 835                     bond->params.updelay * bond->params.miimon);
 836
 837         return 0;
 838 }
 839
 840 static int bond_option_downdelay_set(struct bonding *bond,
 841                                      const struct bond_opt_value *newval)
 842 {
 843         int value = newval->value;
 844
 845         if (!bond->params.miimon) {
 846                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 847                 return -EPERM;
 848         }
 849         if ((value % bond->params.miimon) != 0) {
 850                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 851                             value, bond->params.miimon,
 852                             (value / bond->params.miimon) *
 853                             bond->params.miimon);
 854         }
 855         bond->params.downdelay = value / bond->params.miimon;
 856         netdev_info(bond->dev, "Setting down delay to %d\n",
 857                     bond->params.downdelay * bond->params.miimon);
 858
 859         return 0;
 860 }
 861
 862 static int bond_option_use_carrier_set(struct bonding *bond,
 863                                        const struct bond_opt_value *newval)
 864 {
 865         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 866                     newval->value);
 867         bond->params.use_carrier = newval->value;
 868
 869         return 0;
 870 }
 871
 872 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 873  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 874  * we must start it.
 875  */
 876 static int bond_option_arp_interval_set(struct bonding *bond,
 877                                         const struct bond_opt_value *newval)
 878 {
 879         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 880                     newval->value);
 881         bond->params.arp_interval = newval->value;
 882         if (newval->value) {
 883                 if (bond->params.miimon) {
 884                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 885                         bond->params.miimon = 0;
 886                 }
 887                 if (!bond->params.arp_targets[0])
 888                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 889         }
 890         if (bond->dev->flags & IFF_UP) {
 891                 /* If the interface is up, we may need to fire off
 892                  * the ARP timer.  If the interface is down, the
 893                  * timer will get fired off when the open function
 894                  * is called.
 895                  */
 896                 if (!newval->value) {
 897                         if (bond->params.arp_validate)
 898                                 bond->recv_probe = NULL;
 899                         cancel_delayed_work_sync(&bond->arp_work);
 900                 } else {
 901                         /* arp_validate can be set only in active-backup mode */
 902                         bond->recv_probe = bond_arp_rcv;
 903                         cancel_delayed_work_sync(&bond->mii_work);
 904                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 905                 }
 906         }
 907
 908         return 0;
 909 }
 910
 911 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 912                                             __be32 target,
 913                                             unsigned long last_rx)
 914 {
 915         __be32 *targets = bond->params.arp_targets;
 916         struct list_head *iter;
 917         struct slave *slave;
 918
 919         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 920                 bond_for_each_slave(bond, slave, iter)
 921                         slave->target_last_arp_rx[slot] = last_rx;
 922                 targets[slot] = target;
 923         }
 924 }
 925
 926 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 927 {
 928         __be32 *targets = bond->params.arp_targets;
 929         int ind;
 930
 931         if (!bond_is_ip_target_ok(target)) {
 932                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 933                            &target);
 934                 return -EINVAL;
 935         }
 936
 937         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 938                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 939                            &target);
 940                 return -EINVAL;
 941         }
 942
 943         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 944         if (ind == -1) {
 945                 netdev_err(bond->dev, "ARP target table is full!\n");
 946                 return -EINVAL;
 947         }
 948
 949         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 950
 951         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 952
 953         return 0;
 954 }
 955
 956 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 957 {
 958         int ret;
 959
 960         /* not to race with bond_arp_rcv */
 961         write_lock_bh(&bond->lock);
 962         ret = _bond_option_arp_ip_target_add(bond, target);
 963         write_unlock_bh(&bond->lock);
 964
 965         return ret;
 966 }
 967
 968 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 969 {
 970         __be32 *targets = bond->params.arp_targets;
 971         struct list_head *iter;
 972         struct slave *slave;
 973         unsigned long *targets_rx;
 974         int ind, i;
 975
 976         if (!bond_is_ip_target_ok(target)) {
 977                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
 978                            &target);
 979                 return -EINVAL;
 980         }
 981
 982         ind = bond_get_targets_ip(targets, target);
 983         if (ind == -1) {
 984                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
 985                            &target);
 986                 return -EINVAL;
 987         }
 988
 989         if (ind == 0 && !targets[1] && bond->params.arp_interval)
 990                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
 991
 992         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
 993
 994         /* not to race with bond_arp_rcv */
 995         write_lock_bh(&bond->lock);
 996
 997         bond_for_each_slave(bond, slave, iter) {
 998                 targets_rx = slave->target_last_arp_rx;
 999                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1000                         targets_rx[i] = targets_rx[i+1];
1001                 targets_rx[i] = 0;
1002         }
1003         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1004                 targets[i] = targets[i+1];
1005         targets[i] = 0;
1006
1007         write_unlock_bh(&bond->lock);
1008
1009         return 0;
1010 }
1011
1012 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1013 {
1014         int i;
1015
1016         /* not to race with bond_arp_rcv */
1017         write_lock_bh(&bond->lock);
1018         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1019                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1020         write_unlock_bh(&bond->lock);
1021 }
1022
1023 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1024                                           const struct bond_opt_value *newval)
1025 {
1026         int ret = -EPERM;
1027         __be32 target;
1028
1029         if (newval->string) {
1030                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1031                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1032                                    &target);
1033                         return ret;
1034                 }
1035                 if (newval->string[0] == '+')
1036                         ret = bond_option_arp_ip_target_add(bond, target);
1037                 else if (newval->string[0] == '-')
1038                         ret = bond_option_arp_ip_target_rem(bond, target);
1039                 else
1040                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1041         } else {
1042                 target = newval->value;
1043                 ret = bond_option_arp_ip_target_add(bond, target);
1044         }
1045
1046         return ret;
1047 }
1048
1049 static int bond_option_arp_validate_set(struct bonding *bond,
1050                                         const struct bond_opt_value *newval)
1051 {
1052         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1053                     newval->string, newval->value);
1054
1055         if (bond->dev->flags & IFF_UP) {
1056                 if (!newval->value)
1057                         bond->recv_probe = NULL;
1058                 else if (bond->params.arp_interval)
1059                         bond->recv_probe = bond_arp_rcv;
1060         }
1061         bond->params.arp_validate = newval->value;
1062
1063         return 0;
1064 }
1065
1066 static int bond_option_arp_all_targets_set(struct bonding *bond,
1067                                            const struct bond_opt_value *newval)
1068 {
1069         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1070                     newval->string, newval->value);
1071         bond->params.arp_all_targets = newval->value;
1072
1073         return 0;
1074 }
1075
1076 static int bond_option_primary_set(struct bonding *bond,
1077                                    const struct bond_opt_value *newval)
1078 {
1079         char *p, *primary = newval->string;
1080         struct list_head *iter;
1081         struct slave *slave;
1082
1083         block_netpoll_tx();
1084         read_lock(&bond->lock);
1085         write_lock_bh(&bond->curr_slave_lock);
1086
1087         p = strchr(primary, '\n');
1088         if (p)
1089                 *p = '\0';
1090         /* check to see if we are clearing primary */
1091         if (!strlen(primary)) {
1092                 netdev_info(bond->dev, "Setting primary slave to None\n");
1093                 bond->primary_slave = NULL;
1094                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1095                 bond_select_active_slave(bond);
1096                 goto out;
1097         }
1098
1099         bond_for_each_slave(bond, slave, iter) {
1100                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1101                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1102                                     slave->dev->name);
1103                         bond->primary_slave = slave;
1104                         strcpy(bond->params.primary, slave->dev->name);
1105                         bond_select_active_slave(bond);
1106                         goto out;
1107                 }
1108         }
1109
1110         if (bond->primary_slave) {
1111                 netdev_info(bond->dev, "Setting primary slave to None\n");
1112                 bond->primary_slave = NULL;
1113                 bond_select_active_slave(bond);
1114         }
1115         strncpy(bond->params.primary, primary, IFNAMSIZ);
1116         bond->params.primary[IFNAMSIZ - 1] = 0;
1117
1118         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1119                     primary, bond->dev->name);
1120
1121 out:
1122         write_unlock_bh(&bond->curr_slave_lock);
1123         read_unlock(&bond->lock);
1124         unblock_netpoll_tx();
1125
1126         return 0;
1127 }
1128
1129 static int bond_option_primary_reselect_set(struct bonding *bond,
1130                                             const struct bond_opt_value *newval)
1131 {
1132         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1133                     newval->string, newval->value);
1134         bond->params.primary_reselect = newval->value;
1135
1136         block_netpoll_tx();
1137         write_lock_bh(&bond->curr_slave_lock);
1138         bond_select_active_slave(bond);
1139         write_unlock_bh(&bond->curr_slave_lock);
1140         unblock_netpoll_tx();
1141
1142         return 0;
1143 }
1144
1145 static int bond_option_fail_over_mac_set(struct bonding *bond,
1146                                          const struct bond_opt_value *newval)
1147 {
1148         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1149                     newval->string, newval->value);
1150         bond->params.fail_over_mac = newval->value;
1151
1152         return 0;
1153 }
1154
1155 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1156                                             const struct bond_opt_value *newval)
1157 {
1158         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1159                     newval->string, newval->value);
1160         bond->params.xmit_policy = newval->value;
1161
1162         return 0;
1163 }
1164
1165 static int bond_option_resend_igmp_set(struct bonding *bond,
1166                                        const struct bond_opt_value *newval)
1167 {
1168         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1169                     newval->value);
1170         bond->params.resend_igmp = newval->value;
1171
1172         return 0;
1173 }
1174
1175 static int bond_option_num_peer_notif_set(struct bonding *bond,
1176                                    const struct bond_opt_value *newval)
1177 {
1178         bond->params.num_peer_notif = newval->value;
1179
1180         return 0;
1181 }
1182
1183 static int bond_option_all_slaves_active_set(struct bonding *bond,
1184                                              const struct bond_opt_value *newval)
1185 {
1186         struct list_head *iter;
1187         struct slave *slave;
1188
1189         if (newval->value == bond->params.all_slaves_active)
1190                 return 0;
1191         bond->params.all_slaves_active = newval->value;
1192         bond_for_each_slave(bond, slave, iter) {
1193                 if (!bond_is_active_slave(slave)) {
1194                         if (newval->value)
1195                                 slave->inactive = 0;
1196                         else
1197                                 slave->inactive = 1;
1198                 }
1199         }
1200
1201         return 0;
1202 }
1203
1204 static int bond_option_min_links_set(struct bonding *bond,
1205                                      const struct bond_opt_value *newval)
1206 {
1207         netdev_info(bond->dev, "Setting min links value to %llu\n",
1208                     newval->value);
1209         bond->params.min_links = newval->value;
1210
1211         return 0;
1212 }
1213
1214 static int bond_option_lp_interval_set(struct bonding *bond,
1215                                        const struct bond_opt_value *newval)
1216 {
1217         bond->params.lp_interval = newval->value;
1218
1219         return 0;
1220 }
1221
1222 static int bond_option_pps_set(struct bonding *bond,
1223                                const struct bond_opt_value *newval)
1224 {
1225         bond->params.packets_per_slave = newval->value;
1226         if (newval->value > 0) {
1227                 bond->params.reciprocal_packets_per_slave =
1228                         reciprocal_value(newval->value);
1229         } else {
1230                 /* reciprocal_packets_per_slave is unused if
1231                  * packets_per_slave is 0 or 1, just initialize it
1232                  */
1233                 bond->params.reciprocal_packets_per_slave =
1234                         (struct reciprocal_value) { 0 };
1235         }
1236
1237         return 0;
1238 }
1239
1240 static int bond_option_lacp_rate_set(struct bonding *bond,
1241                                      const struct bond_opt_value *newval)
1242 {
1243         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1244                     newval->string, newval->value);
1245         bond->params.lacp_fast = newval->value;
1246         bond_3ad_update_lacp_rate(bond);
1247
1248         return 0;
1249 }
1250
1251 static int bond_option_ad_select_set(struct bonding *bond,
1252                                      const struct bond_opt_value *newval)
1253 {
1254         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1255                     newval->string, newval->value);
1256         bond->params.ad_select = newval->value;
1257
1258         return 0;
1259 }
1260
1261 static int bond_option_queue_id_set(struct bonding *bond,
1262                                     const struct bond_opt_value *newval)
1263 {
1264         struct slave *slave, *update_slave;
1265         struct net_device *sdev;
1266         struct list_head *iter;
1267         char *delim;
1268         int ret = 0;
1269         u16 qid;
1270
1271         /* delim will point to queue id if successful */
1272         delim = strchr(newval->string, ':');
1273         if (!delim)
1274                 goto err_no_cmd;
1275
1276         /* Terminate string that points to device name and bump it
1277          * up one, so we can read the queue id there.
1278          */
1279         *delim = '\0';
1280         if (sscanf(++delim, "%hd\n", &qid) != 1)
1281                 goto err_no_cmd;
1282
1283         /* Check buffer length, valid ifname and queue id */
1284         if (!dev_valid_name(newval->string) ||
1285             qid > bond->dev->real_num_tx_queues)
1286                 goto err_no_cmd;
1287
1288         /* Get the pointer to that interface if it exists */
1289         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1290         if (!sdev)
1291                 goto err_no_cmd;
1292
1293         /* Search for thes slave and check for duplicate qids */
1294         update_slave = NULL;
1295         bond_for_each_slave(bond, slave, iter) {
1296                 if (sdev == slave->dev)
1297                         /* We don't need to check the matching
1298                          * slave for dups, since we're overwriting it
1299                          */
1300                         update_slave = slave;
1301                 else if (qid && qid == slave->queue_id) {
1302                         goto err_no_cmd;
1303                 }
1304         }
1305
1306         if (!update_slave)
1307                 goto err_no_cmd;
1308
1309         /* Actually set the qids for the slave */
1310         update_slave->queue_id = qid;
1311
1312 out:
1313         return ret;
1314
1315 err_no_cmd:
1316         netdev_info(bond->dev, "invalid input for queue_id set\n");
1317         ret = -EPERM;
1318         goto out;
1319
1320 }
1321
1322 static int bond_option_slaves_set(struct bonding *bond,
1323                                   const struct bond_opt_value *newval)
1324 {
1325         char command[IFNAMSIZ + 1] = { 0, };
1326         struct net_device *dev;
1327         char *ifname;
1328         int ret;
1329
1330         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1331         ifname = command + 1;
1332         if ((strlen(command) <= 1) ||
1333             !dev_valid_name(ifname))
1334                 goto err_no_cmd;
1335
1336         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1337         if (!dev) {
1338                 netdev_info(bond->dev, "interface %s does not exist!\n",
1339                             ifname);
1340                 ret = -ENODEV;
1341                 goto out;
1342         }
1343
1344         switch (command[0]) {
1345         case '+':
1346                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1347                 ret = bond_enslave(bond->dev, dev);
1348                 break;
1349
1350         case '-':
1351                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1352                 ret = bond_release(bond->dev, dev);
1353                 break;
1354
1355         default:
1356                 goto err_no_cmd;
1357         }
1358
1359 out:
1360         return ret;
1361
1362 err_no_cmd:
1363         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1364         ret = -EPERM;
1365         goto out;
1366 }
1367
1368 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1369                                           const struct bond_opt_value *newval)
1370 {
1371         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1372                     newval->string, newval->value);
1373         bond->params.tlb_dynamic_lb = newval->value;
1374
1375         return 0;
1376 }