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                 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 548                        bond->dev->name, opt->name,
 549                        modeval->string, modeval->value);
 550 }
 551
 552 static void bond_opt_error_interpret(struct bonding *bond,
 553                                      const struct bond_option *opt,
 554                                      int error, const struct bond_opt_value *val)
 555 {
 556         const struct bond_opt_value *minval, *maxval;
 557         char *p;
 558
 559         switch (error) {
 560         case -EINVAL:
 561                 if (val) {
 562                         if (val->string) {
 563                                 /* sometimes RAWVAL opts may have new lines */
 564                                 p = strchr(val->string, '\n');
 565                                 if (p)
 566                                         *p = '\0';
 567                                 pr_err("%s: option %s: invalid value (%s)\n",
 568                                        bond->dev->name, opt->name, val->string);
 569                         } else {
 570                                 pr_err("%s: option %s: invalid value (%llu)\n",
 571                                        bond->dev->name, opt->name, val->value);
 572                         }
 573                 }
 574                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 575                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 576                 if (!maxval)
 577                         break;
 578                 pr_err("%s: option %s: allowed values %llu - %llu\n",
 579                        bond->dev->name, opt->name, minval ? minval->value : 0,
 580                        maxval->value);
 581                 break;
 582         case -EACCES:
 583                 bond_opt_dep_print(bond, opt);
 584                 break;
 585         case -ENOTEMPTY:
 586                 pr_err("%s: option %s: unable to set because the bond device has slaves\n",
 587                        bond->dev->name, opt->name);
 588                 break;
 589         case -EBUSY:
 590                 pr_err("%s: option %s: unable to set because the bond device is up\n",
 591                        bond->dev->name, opt->name);
 592                 break;
 593         default:
 594                 break;
 595         }
 596 }
 597
 598 /**
 599  * __bond_opt_set - set a bonding option
 600  * @bond: target bond device
 601  * @option: option to set
 602  * @val: value to set it to
 603  *
 604  * This function is used to change the bond's option value, it can be
 605  * used for both enabling/changing an option and for disabling it. RTNL lock
 606  * must be obtained before calling this function.
 607  */
 608 int __bond_opt_set(struct bonding *bond,
 609                    unsigned int option, struct bond_opt_value *val)
 610 {
 611         const struct bond_opt_value *retval = NULL;
 612         const struct bond_option *opt;
 613         int ret = -ENOENT;
 614
 615         ASSERT_RTNL();
 616
 617         opt = bond_opt_get(option);
 618         if (WARN_ON(!val) || WARN_ON(!opt))
 619                 goto out;
 620         ret = bond_opt_check_deps(bond, opt);
 621         if (ret)
 622                 goto out;
 623         retval = bond_opt_parse(opt, val);
 624         if (!retval) {
 625                 ret = -EINVAL;
 626                 goto out;
 627         }
 628         ret = opt->set(bond, retval);
 629 out:
 630         if (ret)
 631                 bond_opt_error_interpret(bond, opt, ret, val);
 632
 633         return ret;
 634 }
 635
 636 /**
 637  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 638  * @bond: target bond device
 639  * @option: option to set
 640  * @buf: value to set it to
 641  *
 642  * This function tries to acquire RTNL without blocking and if successful
 643  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 644  */
 645 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 646 {
 647         struct bond_opt_value optval;
 648         int ret;
 649
 650         if (!rtnl_trylock())
 651                 return restart_syscall();
 652         bond_opt_initstr(&optval, buf);
 653         ret = __bond_opt_set(bond, option, &optval);
 654         rtnl_unlock();
 655
 656         return ret;
 657 }
 658
 659 /**
 660  * bond_opt_get - get a pointer to an option
 661  * @option: option for which to return a pointer
 662  *
 663  * This function checks if option is valid and if so returns a pointer
 664  * to its entry in the bond_opts[] option array.
 665  */
 666 const struct bond_option *bond_opt_get(unsigned int option)
 667 {
 668         if (!BOND_OPT_VALID(option))
 669                 return NULL;
 670
 671         return &bond_opts[option];
 672 }
 673
 674 int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval)
 675 {
 676         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 677                 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
 678                         bond->dev->name, newval->string);
 679                 /* disable arp monitoring */
 680                 bond->params.arp_interval = 0;
 681                 /* set miimon to default value */
 682                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 683                 pr_info("%s: Setting MII monitoring interval to %d\n",
 684                         bond->dev->name, bond->params.miimon);
 685         }
 686
 687         /* don't cache arp_validate between modes */
 688         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 689         bond->params.mode = newval->value;
 690
 691         return 0;
 692 }
 693
 694 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 695                                                          struct slave *slave)
 696 {
 697         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 698 }
 699
 700 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 701 {
 702         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 703
 704         return __bond_option_active_slave_get(bond, slave);
 705 }
 706
 707 struct net_device *bond_option_active_slave_get(struct bonding *bond)
 708 {
 709         return __bond_option_active_slave_get(bond, bond->curr_active_slave);
 710 }
 711
 712 static int bond_option_active_slave_set(struct bonding *bond,
 713                                         const struct bond_opt_value *newval)
 714 {
 715         char ifname[IFNAMSIZ] = { 0, };
 716         struct net_device *slave_dev;
 717         int ret = 0;
 718
 719         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 720         if (!strlen(ifname) || newval->string[0] == '\n') {
 721                 slave_dev = NULL;
 722         } else {
 723                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 724                 if (!slave_dev)
 725                         return -ENODEV;
 726         }
 727
 728         if (slave_dev) {
 729                 if (!netif_is_bond_slave(slave_dev)) {
 730                         pr_err("Device %s is not bonding slave\n",
 731                                slave_dev->name);
 732                         return -EINVAL;
 733                 }
 734
 735                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 736                         pr_err("%s: Device %s is not our slave\n",
 737                                bond->dev->name, slave_dev->name);
 738                         return -EINVAL;
 739                 }
 740         }
 741
 742         block_netpoll_tx();
 743         write_lock_bh(&bond->curr_slave_lock);
 744
 745         /* check to see if we are clearing active */
 746         if (!slave_dev) {
 747                 pr_info("%s: Clearing current active slave\n", bond->dev->name);
 748                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 749                 bond_select_active_slave(bond);
 750         } else {
 751                 struct slave *old_active = bond->curr_active_slave;
 752                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 753
 754                 BUG_ON(!new_active);
 755
 756                 if (new_active == old_active) {
 757                         /* do nothing */
 758                         pr_info("%s: %s is already the current active slave\n",
 759                                 bond->dev->name, new_active->dev->name);
 760                 } else {
 761                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 762                             bond_slave_is_up(new_active)) {
 763                                 pr_info("%s: Setting %s as active slave\n",
 764                                         bond->dev->name, new_active->dev->name);
 765                                 bond_change_active_slave(bond, new_active);
 766                         } else {
 767                                 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n",
 768                                        bond->dev->name, new_active->dev->name,
 769                                        new_active->dev->name);
 770                                 ret = -EINVAL;
 771                         }
 772                 }
 773         }
 774
 775         write_unlock_bh(&bond->curr_slave_lock);
 776         unblock_netpoll_tx();
 777
 778         return ret;
 779 }
 780
 781 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 782  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 783  * start it.
 784  */
 785 static int bond_option_miimon_set(struct bonding *bond,
 786                                   const struct bond_opt_value *newval)
 787 {
 788         pr_info("%s: Setting MII monitoring interval to %llu\n",
 789                 bond->dev->name, newval->value);
 790         bond->params.miimon = newval->value;
 791         if (bond->params.updelay)
 792                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 793                         bond->dev->name,
 794                         bond->params.updelay * bond->params.miimon);
 795         if (bond->params.downdelay)
 796                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 797                         bond->dev->name,
 798                         bond->params.downdelay * bond->params.miimon);
 799         if (newval->value && bond->params.arp_interval) {
 800                 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n",
 801                         bond->dev->name);
 802                 bond->params.arp_interval = 0;
 803                 if (bond->params.arp_validate)
 804                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 805         }
 806         if (bond->dev->flags & IFF_UP) {
 807                 /* If the interface is up, we may need to fire off
 808                  * the MII timer. If the interface is down, the
 809                  * timer will get fired off when the open function
 810                  * is called.
 811                  */
 812                 if (!newval->value) {
 813                         cancel_delayed_work_sync(&bond->mii_work);
 814                 } else {
 815                         cancel_delayed_work_sync(&bond->arp_work);
 816                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 817                 }
 818         }
 819
 820         return 0;
 821 }
 822
 823 /* Set up and down delays. These must be multiples of the
 824  * MII monitoring value, and are stored internally as the multiplier.
 825  * Thus, we must translate to MS for the real world.
 826  */
 827 static int bond_option_updelay_set(struct bonding *bond,
 828                                    const struct bond_opt_value *newval)
 829 {
 830         int value = newval->value;
 831
 832         if (!bond->params.miimon) {
 833                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 834                        bond->dev->name);
 835                 return -EPERM;
 836         }
 837         if ((value % bond->params.miimon) != 0) {
 838                 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 839                         bond->dev->name, value,
 840                         bond->params.miimon,
 841                         (value / bond->params.miimon) *
 842                         bond->params.miimon);
 843         }
 844         bond->params.updelay = value / bond->params.miimon;
 845         pr_info("%s: Setting up delay to %d\n",
 846                 bond->dev->name, bond->params.updelay * bond->params.miimon);
 847
 848         return 0;
 849 }
 850
 851 static int bond_option_downdelay_set(struct bonding *bond,
 852                                      const struct bond_opt_value *newval)
 853 {
 854         int value = newval->value;
 855
 856         if (!bond->params.miimon) {
 857                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 858                        bond->dev->name);
 859                 return -EPERM;
 860         }
 861         if ((value % bond->params.miimon) != 0) {
 862                 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 863                         bond->dev->name, value,
 864                         bond->params.miimon,
 865                         (value / bond->params.miimon) *
 866                         bond->params.miimon);
 867         }
 868         bond->params.downdelay = value / bond->params.miimon;
 869         pr_info("%s: Setting down delay to %d\n",
 870                 bond->dev->name, bond->params.downdelay * bond->params.miimon);
 871
 872         return 0;
 873 }
 874
 875 static int bond_option_use_carrier_set(struct bonding *bond,
 876                                        const struct bond_opt_value *newval)
 877 {
 878         pr_info("%s: Setting use_carrier to %llu\n",
 879                 bond->dev->name, newval->value);
 880         bond->params.use_carrier = newval->value;
 881
 882         return 0;
 883 }
 884
 885 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 886  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 887  * we must start it.
 888  */
 889 static int bond_option_arp_interval_set(struct bonding *bond,
 890                                         const struct bond_opt_value *newval)
 891 {
 892         pr_info("%s: Setting ARP monitoring interval to %llu\n",
 893                 bond->dev->name, newval->value);
 894         bond->params.arp_interval = newval->value;
 895         if (newval->value) {
 896                 if (bond->params.miimon) {
 897                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n",
 898                                 bond->dev->name, bond->dev->name);
 899                         bond->params.miimon = 0;
 900                 }
 901                 if (!bond->params.arp_targets[0])
 902                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n",
 903                                 bond->dev->name);
 904         }
 905         if (bond->dev->flags & IFF_UP) {
 906                 /* If the interface is up, we may need to fire off
 907                  * the ARP timer.  If the interface is down, the
 908                  * timer will get fired off when the open function
 909                  * is called.
 910                  */
 911                 if (!newval->value) {
 912                         if (bond->params.arp_validate)
 913                                 bond->recv_probe = NULL;
 914                         cancel_delayed_work_sync(&bond->arp_work);
 915                 } else {
 916                         /* arp_validate can be set only in active-backup mode */
 917                         bond->recv_probe = bond_arp_rcv;
 918                         cancel_delayed_work_sync(&bond->mii_work);
 919                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 920                 }
 921         }
 922
 923         return 0;
 924 }
 925
 926 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 927                                             __be32 target,
 928                                             unsigned long last_rx)
 929 {
 930         __be32 *targets = bond->params.arp_targets;
 931         struct list_head *iter;
 932         struct slave *slave;
 933
 934         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 935                 bond_for_each_slave(bond, slave, iter)
 936                         slave->target_last_arp_rx[slot] = last_rx;
 937                 targets[slot] = target;
 938         }
 939 }
 940
 941 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 942 {
 943         __be32 *targets = bond->params.arp_targets;
 944         int ind;
 945
 946         if (!bond_is_ip_target_ok(target)) {
 947                 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 948                        bond->dev->name, &target);
 949                 return -EINVAL;
 950         }
 951
 952         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 953                 pr_err("%s: ARP target %pI4 is already present\n",
 954                        bond->dev->name, &target);
 955                 return -EINVAL;
 956         }
 957
 958         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 959         if (ind == -1) {
 960                 pr_err("%s: ARP target table is full!\n", bond->dev->name);
 961                 return -EINVAL;
 962         }
 963
 964         pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target);
 965
 966         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 967
 968         return 0;
 969 }
 970
 971 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 972 {
 973         int ret;
 974
 975         /* not to race with bond_arp_rcv */
 976         write_lock_bh(&bond->lock);
 977         ret = _bond_option_arp_ip_target_add(bond, target);
 978         write_unlock_bh(&bond->lock);
 979
 980         return ret;
 981 }
 982
 983 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 984 {
 985         __be32 *targets = bond->params.arp_targets;
 986         struct list_head *iter;
 987         struct slave *slave;
 988         unsigned long *targets_rx;
 989         int ind, i;
 990
 991         if (!bond_is_ip_target_ok(target)) {
 992                 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 993                        bond->dev->name, &target);
 994                 return -EINVAL;
 995         }
 996
 997         ind = bond_get_targets_ip(targets, target);
 998         if (ind == -1) {
 999                 pr_err("%s: unable to remove nonexistent ARP target %pI4\n",
1000                        bond->dev->name, &target);
1001                 return -EINVAL;
1002         }
1003
1004         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1005                 pr_warn("%s: Removing last arp target with arp_interval on\n",
1006                         bond->dev->name);
1007
1008         pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target);
1009
1010         /* not to race with bond_arp_rcv */
1011         write_lock_bh(&bond->lock);
1012
1013         bond_for_each_slave(bond, slave, iter) {
1014                 targets_rx = slave->target_last_arp_rx;
1015                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1016                         targets_rx[i] = targets_rx[i+1];
1017                 targets_rx[i] = 0;
1018         }
1019         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1020                 targets[i] = targets[i+1];
1021         targets[i] = 0;
1022
1023         write_unlock_bh(&bond->lock);
1024
1025         return 0;
1026 }
1027
1028 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1029 {
1030         int i;
1031
1032         /* not to race with bond_arp_rcv */
1033         write_lock_bh(&bond->lock);
1034         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1035                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1036         write_unlock_bh(&bond->lock);
1037 }
1038
1039 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1040                                           const struct bond_opt_value *newval)
1041 {
1042         int ret = -EPERM;
1043         __be32 target;
1044
1045         if (newval->string) {
1046                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1047                         pr_err("%s: invalid ARP target %pI4 specified\n",
1048                                bond->dev->name, &target);
1049                         return ret;
1050                 }
1051                 if (newval->string[0] == '+')
1052                         ret = bond_option_arp_ip_target_add(bond, target);
1053                 else if (newval->string[0] == '-')
1054                         ret = bond_option_arp_ip_target_rem(bond, target);
1055                 else
1056                         pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n",
1057                                bond->dev->name);
1058         } else {
1059                 target = newval->value;
1060                 ret = bond_option_arp_ip_target_add(bond, target);
1061         }
1062
1063         return ret;
1064 }
1065
1066 static int bond_option_arp_validate_set(struct bonding *bond,
1067                                         const struct bond_opt_value *newval)
1068 {
1069         pr_info("%s: Setting arp_validate to %s (%llu)\n",
1070                 bond->dev->name, newval->string, newval->value);
1071
1072         if (bond->dev->flags & IFF_UP) {
1073                 if (!newval->value)
1074                         bond->recv_probe = NULL;
1075                 else if (bond->params.arp_interval)
1076                         bond->recv_probe = bond_arp_rcv;
1077         }
1078         bond->params.arp_validate = newval->value;
1079
1080         return 0;
1081 }
1082
1083 static int bond_option_arp_all_targets_set(struct bonding *bond,
1084                                            const struct bond_opt_value *newval)
1085 {
1086         pr_info("%s: Setting arp_all_targets to %s (%llu)\n",
1087                 bond->dev->name, newval->string, newval->value);
1088         bond->params.arp_all_targets = newval->value;
1089
1090         return 0;
1091 }
1092
1093 static int bond_option_primary_set(struct bonding *bond,
1094                                    const struct bond_opt_value *newval)
1095 {
1096         char *p, *primary = newval->string;
1097         struct list_head *iter;
1098         struct slave *slave;
1099
1100         block_netpoll_tx();
1101         read_lock(&bond->lock);
1102         write_lock_bh(&bond->curr_slave_lock);
1103
1104         p = strchr(primary, '\n');
1105         if (p)
1106                 *p = '\0';
1107         /* check to see if we are clearing primary */
1108         if (!strlen(primary)) {
1109                 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1110                 bond->primary_slave = NULL;
1111                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1112                 bond_select_active_slave(bond);
1113                 goto out;
1114         }
1115
1116         bond_for_each_slave(bond, slave, iter) {
1117                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1118                         pr_info("%s: Setting %s as primary slave\n",
1119                                 bond->dev->name, slave->dev->name);
1120                         bond->primary_slave = slave;
1121                         strcpy(bond->params.primary, slave->dev->name);
1122                         bond_select_active_slave(bond);
1123                         goto out;
1124                 }
1125         }
1126
1127         if (bond->primary_slave) {
1128                 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1129                 bond->primary_slave = NULL;
1130                 bond_select_active_slave(bond);
1131         }
1132         strncpy(bond->params.primary, primary, IFNAMSIZ);
1133         bond->params.primary[IFNAMSIZ - 1] = 0;
1134
1135         pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n",
1136                 bond->dev->name, primary, bond->dev->name);
1137
1138 out:
1139         write_unlock_bh(&bond->curr_slave_lock);
1140         read_unlock(&bond->lock);
1141         unblock_netpoll_tx();
1142
1143         return 0;
1144 }
1145
1146 static int bond_option_primary_reselect_set(struct bonding *bond,
1147                                             const struct bond_opt_value *newval)
1148 {
1149         pr_info("%s: Setting primary_reselect to %s (%llu)\n",
1150                 bond->dev->name, newval->string, newval->value);
1151         bond->params.primary_reselect = newval->value;
1152
1153         block_netpoll_tx();
1154         write_lock_bh(&bond->curr_slave_lock);
1155         bond_select_active_slave(bond);
1156         write_unlock_bh(&bond->curr_slave_lock);
1157         unblock_netpoll_tx();
1158
1159         return 0;
1160 }
1161
1162 static int bond_option_fail_over_mac_set(struct bonding *bond,
1163                                          const struct bond_opt_value *newval)
1164 {
1165         pr_info("%s: Setting fail_over_mac to %s (%llu)\n",
1166                 bond->dev->name, newval->string, newval->value);
1167         bond->params.fail_over_mac = newval->value;
1168
1169         return 0;
1170 }
1171
1172 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1173                                             const struct bond_opt_value *newval)
1174 {
1175         pr_info("%s: Setting xmit hash policy to %s (%llu)\n",
1176                 bond->dev->name, newval->string, newval->value);
1177         bond->params.xmit_policy = newval->value;
1178
1179         return 0;
1180 }
1181
1182 static int bond_option_resend_igmp_set(struct bonding *bond,
1183                                        const struct bond_opt_value *newval)
1184 {
1185         pr_info("%s: Setting resend_igmp to %llu\n",
1186                 bond->dev->name, newval->value);
1187         bond->params.resend_igmp = newval->value;
1188
1189         return 0;
1190 }
1191
1192 static int bond_option_num_peer_notif_set(struct bonding *bond,
1193                                    const struct bond_opt_value *newval)
1194 {
1195         bond->params.num_peer_notif = newval->value;
1196
1197         return 0;
1198 }
1199
1200 static int bond_option_all_slaves_active_set(struct bonding *bond,
1201                                              const struct bond_opt_value *newval)
1202 {
1203         struct list_head *iter;
1204         struct slave *slave;
1205
1206         if (newval->value == bond->params.all_slaves_active)
1207                 return 0;
1208         bond->params.all_slaves_active = newval->value;
1209         bond_for_each_slave(bond, slave, iter) {
1210                 if (!bond_is_active_slave(slave)) {
1211                         if (newval->value)
1212                                 slave->inactive = 0;
1213                         else
1214                                 slave->inactive = 1;
1215                 }
1216         }
1217
1218         return 0;
1219 }
1220
1221 static int bond_option_min_links_set(struct bonding *bond,
1222                                      const struct bond_opt_value *newval)
1223 {
1224         pr_info("%s: Setting min links value to %llu\n",
1225                 bond->dev->name, newval->value);
1226         bond->params.min_links = newval->value;
1227
1228         return 0;
1229 }
1230
1231 static int bond_option_lp_interval_set(struct bonding *bond,
1232                                        const struct bond_opt_value *newval)
1233 {
1234         bond->params.lp_interval = newval->value;
1235
1236         return 0;
1237 }
1238
1239 static int bond_option_pps_set(struct bonding *bond,
1240                                const struct bond_opt_value *newval)
1241 {
1242         bond->params.packets_per_slave = newval->value;
1243         if (newval->value > 0) {
1244                 bond->params.reciprocal_packets_per_slave =
1245                         reciprocal_value(newval->value);
1246         } else {
1247                 /* reciprocal_packets_per_slave is unused if
1248                  * packets_per_slave is 0 or 1, just initialize it
1249                  */
1250                 bond->params.reciprocal_packets_per_slave =
1251                         (struct reciprocal_value) { 0 };
1252         }
1253
1254         return 0;
1255 }
1256
1257 static int bond_option_lacp_rate_set(struct bonding *bond,
1258                                      const struct bond_opt_value *newval)
1259 {
1260         pr_info("%s: Setting LACP rate to %s (%llu)\n",
1261                 bond->dev->name, newval->string, newval->value);
1262         bond->params.lacp_fast = newval->value;
1263         bond_3ad_update_lacp_rate(bond);
1264
1265         return 0;
1266 }
1267
1268 static int bond_option_ad_select_set(struct bonding *bond,
1269                                      const struct bond_opt_value *newval)
1270 {
1271         pr_info("%s: Setting ad_select to %s (%llu)\n",
1272                 bond->dev->name, newval->string, newval->value);
1273         bond->params.ad_select = newval->value;
1274
1275         return 0;
1276 }
1277
1278 static int bond_option_queue_id_set(struct bonding *bond,
1279                                     const struct bond_opt_value *newval)
1280 {
1281         struct slave *slave, *update_slave;
1282         struct net_device *sdev;
1283         struct list_head *iter;
1284         char *delim;
1285         int ret = 0;
1286         u16 qid;
1287
1288         /* delim will point to queue id if successful */
1289         delim = strchr(newval->string, ':');
1290         if (!delim)
1291                 goto err_no_cmd;
1292
1293         /* Terminate string that points to device name and bump it
1294          * up one, so we can read the queue id there.
1295          */
1296         *delim = '\0';
1297         if (sscanf(++delim, "%hd\n", &qid) != 1)
1298                 goto err_no_cmd;
1299
1300         /* Check buffer length, valid ifname and queue id */
1301         if (!dev_valid_name(newval->string) ||
1302             qid > bond->dev->real_num_tx_queues)
1303                 goto err_no_cmd;
1304
1305         /* Get the pointer to that interface if it exists */
1306         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1307         if (!sdev)
1308                 goto err_no_cmd;
1309
1310         /* Search for thes slave and check for duplicate qids */
1311         update_slave = NULL;
1312         bond_for_each_slave(bond, slave, iter) {
1313                 if (sdev == slave->dev)
1314                         /* We don't need to check the matching
1315                          * slave for dups, since we're overwriting it
1316                          */
1317                         update_slave = slave;
1318                 else if (qid && qid == slave->queue_id) {
1319                         goto err_no_cmd;
1320                 }
1321         }
1322
1323         if (!update_slave)
1324                 goto err_no_cmd;
1325
1326         /* Actually set the qids for the slave */
1327         update_slave->queue_id = qid;
1328
1329 out:
1330         return ret;
1331
1332 err_no_cmd:
1333         pr_info("invalid input for queue_id set for %s\n", bond->dev->name);
1334         ret = -EPERM;
1335         goto out;
1336
1337 }
1338
1339 static int bond_option_slaves_set(struct bonding *bond,
1340                                   const struct bond_opt_value *newval)
1341 {
1342         char command[IFNAMSIZ + 1] = { 0, };
1343         struct net_device *dev;
1344         char *ifname;
1345         int ret;
1346
1347         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1348         ifname = command + 1;
1349         if ((strlen(command) <= 1) ||
1350             !dev_valid_name(ifname))
1351                 goto err_no_cmd;
1352
1353         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1354         if (!dev) {
1355                 pr_info("%s: interface %s does not exist!\n",
1356                         bond->dev->name, ifname);
1357                 ret = -ENODEV;
1358                 goto out;
1359         }
1360
1361         switch (command[0]) {
1362         case '+':
1363                 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name);
1364                 ret = bond_enslave(bond->dev, dev);
1365                 break;
1366
1367         case '-':
1368                 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name);
1369                 ret = bond_release(bond->dev, dev);
1370                 break;
1371
1372         default:
1373                 goto err_no_cmd;
1374         }
1375
1376 out:
1377         return ret;
1378
1379 err_no_cmd:
1380         pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n",
1381                bond->dev->name);
1382         ret = -EPERM;
1383         goto out;
1384 }
1385
1386 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1387                                           const struct bond_opt_value *newval)
1388 {
1389         pr_info("%s: Setting dynamic-lb to %s (%llu)\n",
1390                 bond->dev->name, newval->string, newval->value);
1391         bond->params.tlb_dynamic_lb = newval->value;
1392
1393         return 0;
1394 }