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 #include <linux/errno.h>
  13 #include <linux/if.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/ctype.h>
  18 #include <linux/inet.h>
  19 #include <net/bonding.h>
  20
  21 static int bond_option_active_slave_set(struct bonding *bond,
  22                                         const struct bond_opt_value *newval);
  23 static int bond_option_miimon_set(struct bonding *bond,
  24                                   const struct bond_opt_value *newval);
  25 static int bond_option_updelay_set(struct bonding *bond,
  26                                    const struct bond_opt_value *newval);
  27 static int bond_option_downdelay_set(struct bonding *bond,
  28                                      const struct bond_opt_value *newval);
  29 static int bond_option_use_carrier_set(struct bonding *bond,
  30                                        const struct bond_opt_value *newval);
  31 static int bond_option_arp_interval_set(struct bonding *bond,
  32                                         const struct bond_opt_value *newval);
  33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
  36                                           const struct bond_opt_value *newval);
  37 static int bond_option_arp_validate_set(struct bonding *bond,
  38                                         const struct bond_opt_value *newval);
  39 static int bond_option_arp_all_targets_set(struct bonding *bond,
  40                                            const struct bond_opt_value *newval);
  41 static int bond_option_primary_set(struct bonding *bond,
  42                                    const struct bond_opt_value *newval);
  43 static int bond_option_primary_reselect_set(struct bonding *bond,
  44                                             const struct bond_opt_value *newval);
  45 static int bond_option_fail_over_mac_set(struct bonding *bond,
  46                                          const struct bond_opt_value *newval);
  47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  48                                             const struct bond_opt_value *newval);
  49 static int bond_option_resend_igmp_set(struct bonding *bond,
  50                                        const struct bond_opt_value *newval);
  51 static int bond_option_num_peer_notif_set(struct bonding *bond,
  52                                           const struct bond_opt_value *newval);
  53 static int bond_option_all_slaves_active_set(struct bonding *bond,
  54                                              const struct bond_opt_value *newval);
  55 static int bond_option_min_links_set(struct bonding *bond,
  56                                      const struct bond_opt_value *newval);
  57 static int bond_option_lp_interval_set(struct bonding *bond,
  58                                        const struct bond_opt_value *newval);
  59 static int bond_option_pps_set(struct bonding *bond,
  60                                const struct bond_opt_value *newval);
  61 static int bond_option_lacp_rate_set(struct bonding *bond,
  62                                      const struct bond_opt_value *newval);
  63 static int bond_option_ad_select_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_queue_id_set(struct bonding *bond,
  66                                     const struct bond_opt_value *newval);
  67 static int bond_option_mode_set(struct bonding *bond,
  68                                 const struct bond_opt_value *newval);
  69 static int bond_option_slaves_set(struct bonding *bond,
  70                                   const struct bond_opt_value *newval);
  71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73 static int bond_option_ad_actor_sys_prio_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_opt_value bond_ad_actor_sys_prio_tbl[] = {
 192         { "minval",  1,     BOND_VALFLAG_MIN},
 193         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 194         { NULL,      -1,    0},
 195 };
 196
 197 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 198         [BOND_OPT_MODE] = {
 199                 .id = BOND_OPT_MODE,
 200                 .name = "mode",
 201                 .desc = "bond device mode",
 202                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 203                 .values = bond_mode_tbl,
 204                 .set = bond_option_mode_set
 205         },
 206         [BOND_OPT_PACKETS_PER_SLAVE] = {
 207                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 208                 .name = "packets_per_slave",
 209                 .desc = "Packets to send per slave in RR mode",
 210                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 211                 .values = bond_pps_tbl,
 212                 .set = bond_option_pps_set
 213         },
 214         [BOND_OPT_XMIT_HASH] = {
 215                 .id = BOND_OPT_XMIT_HASH,
 216                 .name = "xmit_hash_policy",
 217                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 218                 .values = bond_xmit_hashtype_tbl,
 219                 .set = bond_option_xmit_hash_policy_set
 220         },
 221         [BOND_OPT_ARP_VALIDATE] = {
 222                 .id = BOND_OPT_ARP_VALIDATE,
 223                 .name = "arp_validate",
 224                 .desc = "validate src/dst of ARP probes",
 225                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 226                                BIT(BOND_MODE_ALB),
 227                 .values = bond_arp_validate_tbl,
 228                 .set = bond_option_arp_validate_set
 229         },
 230         [BOND_OPT_ARP_ALL_TARGETS] = {
 231                 .id = BOND_OPT_ARP_ALL_TARGETS,
 232                 .name = "arp_all_targets",
 233                 .desc = "fail on any/all arp targets timeout",
 234                 .values = bond_arp_all_targets_tbl,
 235                 .set = bond_option_arp_all_targets_set
 236         },
 237         [BOND_OPT_FAIL_OVER_MAC] = {
 238                 .id = BOND_OPT_FAIL_OVER_MAC,
 239                 .name = "fail_over_mac",
 240                 .desc = "For active-backup, do not set all slaves to the same MAC",
 241                 .flags = BOND_OPTFLAG_NOSLAVES,
 242                 .values = bond_fail_over_mac_tbl,
 243                 .set = bond_option_fail_over_mac_set
 244         },
 245         [BOND_OPT_ARP_INTERVAL] = {
 246                 .id = BOND_OPT_ARP_INTERVAL,
 247                 .name = "arp_interval",
 248                 .desc = "arp interval in milliseconds",
 249                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 250                                BIT(BOND_MODE_ALB),
 251                 .values = bond_intmax_tbl,
 252                 .set = bond_option_arp_interval_set
 253         },
 254         [BOND_OPT_ARP_TARGETS] = {
 255                 .id = BOND_OPT_ARP_TARGETS,
 256                 .name = "arp_ip_target",
 257                 .desc = "arp targets in n.n.n.n form",
 258                 .flags = BOND_OPTFLAG_RAWVAL,
 259                 .set = bond_option_arp_ip_targets_set
 260         },
 261         [BOND_OPT_DOWNDELAY] = {
 262                 .id = BOND_OPT_DOWNDELAY,
 263                 .name = "downdelay",
 264                 .desc = "Delay before considering link down, in milliseconds",
 265                 .values = bond_intmax_tbl,
 266                 .set = bond_option_downdelay_set
 267         },
 268         [BOND_OPT_UPDELAY] = {
 269                 .id = BOND_OPT_UPDELAY,
 270                 .name = "updelay",
 271                 .desc = "Delay before considering link up, in milliseconds",
 272                 .values = bond_intmax_tbl,
 273                 .set = bond_option_updelay_set
 274         },
 275         [BOND_OPT_LACP_RATE] = {
 276                 .id = BOND_OPT_LACP_RATE,
 277                 .name = "lacp_rate",
 278                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 279                 .flags = BOND_OPTFLAG_IFDOWN,
 280                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 281                 .values = bond_lacp_rate_tbl,
 282                 .set = bond_option_lacp_rate_set
 283         },
 284         [BOND_OPT_MINLINKS] = {
 285                 .id = BOND_OPT_MINLINKS,
 286                 .name = "min_links",
 287                 .desc = "Minimum number of available links before turning on carrier",
 288                 .values = bond_intmax_tbl,
 289                 .set = bond_option_min_links_set
 290         },
 291         [BOND_OPT_AD_SELECT] = {
 292                 .id = BOND_OPT_AD_SELECT,
 293                 .name = "ad_select",
 294                 .desc = "803.ad aggregation selection logic",
 295                 .flags = BOND_OPTFLAG_IFDOWN,
 296                 .values = bond_ad_select_tbl,
 297                 .set = bond_option_ad_select_set
 298         },
 299         [BOND_OPT_NUM_PEER_NOTIF] = {
 300                 .id = BOND_OPT_NUM_PEER_NOTIF,
 301                 .name = "num_unsol_na",
 302                 .desc = "Number of peer notifications to send on failover event",
 303                 .values = bond_num_peer_notif_tbl,
 304                 .set = bond_option_num_peer_notif_set
 305         },
 306         [BOND_OPT_MIIMON] = {
 307                 .id = BOND_OPT_MIIMON,
 308                 .name = "miimon",
 309                 .desc = "Link check interval in milliseconds",
 310                 .values = bond_intmax_tbl,
 311                 .set = bond_option_miimon_set
 312         },
 313         [BOND_OPT_PRIMARY] = {
 314                 .id = BOND_OPT_PRIMARY,
 315                 .name = "primary",
 316                 .desc = "Primary network device to use",
 317                 .flags = BOND_OPTFLAG_RAWVAL,
 318                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 319                                                 BIT(BOND_MODE_TLB) |
 320                                                 BIT(BOND_MODE_ALB)),
 321                 .set = bond_option_primary_set
 322         },
 323         [BOND_OPT_PRIMARY_RESELECT] = {
 324                 .id = BOND_OPT_PRIMARY_RESELECT,
 325                 .name = "primary_reselect",
 326                 .desc = "Reselect primary slave once it comes up",
 327                 .values = bond_primary_reselect_tbl,
 328                 .set = bond_option_primary_reselect_set
 329         },
 330         [BOND_OPT_USE_CARRIER] = {
 331                 .id = BOND_OPT_USE_CARRIER,
 332                 .name = "use_carrier",
 333                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 334                 .values = bond_use_carrier_tbl,
 335                 .set = bond_option_use_carrier_set
 336         },
 337         [BOND_OPT_ACTIVE_SLAVE] = {
 338                 .id = BOND_OPT_ACTIVE_SLAVE,
 339                 .name = "active_slave",
 340                 .desc = "Currently active slave",
 341                 .flags = BOND_OPTFLAG_RAWVAL,
 342                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 343                                                 BIT(BOND_MODE_TLB) |
 344                                                 BIT(BOND_MODE_ALB)),
 345                 .set = bond_option_active_slave_set
 346         },
 347         [BOND_OPT_QUEUE_ID] = {
 348                 .id = BOND_OPT_QUEUE_ID,
 349                 .name = "queue_id",
 350                 .desc = "Set queue id of a slave",
 351                 .flags = BOND_OPTFLAG_RAWVAL,
 352                 .set = bond_option_queue_id_set
 353         },
 354         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 355                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 356                 .name = "all_slaves_active",
 357                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 358                 .values = bond_all_slaves_active_tbl,
 359                 .set = bond_option_all_slaves_active_set
 360         },
 361         [BOND_OPT_RESEND_IGMP] = {
 362                 .id = BOND_OPT_RESEND_IGMP,
 363                 .name = "resend_igmp",
 364                 .desc = "Number of IGMP membership reports to send on link failure",
 365                 .values = bond_resend_igmp_tbl,
 366                 .set = bond_option_resend_igmp_set
 367         },
 368         [BOND_OPT_LP_INTERVAL] = {
 369                 .id = BOND_OPT_LP_INTERVAL,
 370                 .name = "lp_interval",
 371                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 372                 .values = bond_lp_interval_tbl,
 373                 .set = bond_option_lp_interval_set
 374         },
 375         [BOND_OPT_SLAVES] = {
 376                 .id = BOND_OPT_SLAVES,
 377                 .name = "slaves",
 378                 .desc = "Slave membership management",
 379                 .flags = BOND_OPTFLAG_RAWVAL,
 380                 .set = bond_option_slaves_set
 381         },
 382         [BOND_OPT_TLB_DYNAMIC_LB] = {
 383                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 384                 .name = "tlb_dynamic_lb",
 385                 .desc = "Enable dynamic flow shuffling",
 386                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
 387                 .values = bond_tlb_dynamic_lb_tbl,
 388                 .flags = BOND_OPTFLAG_IFDOWN,
 389                 .set = bond_option_tlb_dynamic_lb_set,
 390         },
 391         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 392                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 393                 .name = "ad_actor_sys_prio",
 394                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 395                 .flags = BOND_OPTFLAG_IFDOWN,
 396                 .values = bond_ad_actor_sys_prio_tbl,
 397                 .set = bond_option_ad_actor_sys_prio_set,
 398         },
 399 };
 400
 401 /* Searches for an option by name */
 402 const struct bond_option *bond_opt_get_by_name(const char *name)
 403 {
 404         const struct bond_option *opt;
 405         int option;
 406
 407         for (option = 0; option < BOND_OPT_LAST; option++) {
 408                 opt = bond_opt_get(option);
 409                 if (opt && !strcmp(opt->name, name))
 410                         return opt;
 411         }
 412
 413         return NULL;
 414 }
 415
 416 /* Searches for a value in opt's values[] table */
 417 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 418 {
 419         const struct bond_option *opt;
 420         int i;
 421
 422         opt = bond_opt_get(option);
 423         if (WARN_ON(!opt))
 424                 return NULL;
 425         for (i = 0; opt->values && opt->values[i].string; i++)
 426                 if (opt->values[i].value == val)
 427                         return &opt->values[i];
 428
 429         return NULL;
 430 }
 431
 432 /* Searches for a value in opt's values[] table which matches the flagmask */
 433 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 434                                                  u32 flagmask)
 435 {
 436         int i;
 437
 438         for (i = 0; opt->values && opt->values[i].string; i++)
 439                 if (opt->values[i].flags & flagmask)
 440                         return &opt->values[i];
 441
 442         return NULL;
 443 }
 444
 445 /* If maxval is missing then there's no range to check. In case minval is
 446  * missing then it's considered to be 0.
 447  */
 448 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 449 {
 450         const struct bond_opt_value *minval, *maxval;
 451
 452         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 453         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 454         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 455                 return false;
 456
 457         return true;
 458 }
 459
 460 /**
 461  * bond_opt_parse - parse option value
 462  * @opt: the option to parse against
 463  * @val: value to parse
 464  *
 465  * This function tries to extract the value from @val and check if it's
 466  * a possible match for the option and returns NULL if a match isn't found,
 467  * or the struct_opt_value that matched. It also strips the new line from
 468  * @val->string if it's present.
 469  */
 470 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 471                                             struct bond_opt_value *val)
 472 {
 473         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 474         const struct bond_opt_value *tbl;
 475         const struct bond_opt_value *ret = NULL;
 476         bool checkval;
 477         int i, rv;
 478
 479         /* No parsing if the option wants a raw val */
 480         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 481                 return val;
 482
 483         tbl = opt->values;
 484         if (!tbl)
 485                 goto out;
 486
 487         /* ULLONG_MAX is used to bypass string processing */
 488         checkval = val->value != ULLONG_MAX;
 489         if (!checkval) {
 490                 if (!val->string)
 491                         goto out;
 492                 p = strchr(val->string, '\n');
 493                 if (p)
 494                         *p = '\0';
 495                 for (p = val->string; *p; p++)
 496                         if (!(isdigit(*p) || isspace(*p)))
 497                                 break;
 498                 /* The following code extracts the string to match or the value
 499                  * and sets checkval appropriately
 500                  */
 501                 if (*p) {
 502                         rv = sscanf(val->string, "%32s", valstr);
 503                 } else {
 504                         rv = sscanf(val->string, "%llu", &val->value);
 505                         checkval = true;
 506                 }
 507                 if (!rv)
 508                         goto out;
 509         }
 510
 511         for (i = 0; tbl[i].string; i++) {
 512                 /* Check for exact match */
 513                 if (checkval) {
 514                         if (val->value == tbl[i].value)
 515                                 ret = &tbl[i];
 516                 } else {
 517                         if (!strcmp(valstr, "default") &&
 518                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 519                                 ret = &tbl[i];
 520
 521                         if (!strcmp(valstr, tbl[i].string))
 522                                 ret = &tbl[i];
 523                 }
 524                 /* Found an exact match */
 525                 if (ret)
 526                         goto out;
 527         }
 528         /* Possible range match */
 529         if (checkval && bond_opt_check_range(opt, val->value))
 530                 ret = val;
 531 out:
 532         return ret;
 533 }
 534
 535 /* Check opt's dependencies against bond mode and currently set options */
 536 static int bond_opt_check_deps(struct bonding *bond,
 537                                const struct bond_option *opt)
 538 {
 539         struct bond_params *params = &bond->params;
 540
 541         if (test_bit(params->mode, &opt->unsuppmodes))
 542                 return -EACCES;
 543         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 544                 return -ENOTEMPTY;
 545         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 546                 return -EBUSY;
 547
 548         return 0;
 549 }
 550
 551 static void bond_opt_dep_print(struct bonding *bond,
 552                                const struct bond_option *opt)
 553 {
 554         const struct bond_opt_value *modeval;
 555         struct bond_params *params;
 556
 557         params = &bond->params;
 558         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 559         if (test_bit(params->mode, &opt->unsuppmodes))
 560                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 561                            opt->name, modeval->string, modeval->value);
 562 }
 563
 564 static void bond_opt_error_interpret(struct bonding *bond,
 565                                      const struct bond_option *opt,
 566                                      int error, const struct bond_opt_value *val)
 567 {
 568         const struct bond_opt_value *minval, *maxval;
 569         char *p;
 570
 571         switch (error) {
 572         case -EINVAL:
 573                 if (val) {
 574                         if (val->string) {
 575                                 /* sometimes RAWVAL opts may have new lines */
 576                                 p = strchr(val->string, '\n');
 577                                 if (p)
 578                                         *p = '\0';
 579                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 580                                            opt->name, val->string);
 581                         } else {
 582                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 583                                            opt->name, val->value);
 584                         }
 585                 }
 586                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 587                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 588                 if (!maxval)
 589                         break;
 590                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 591                            opt->name, minval ? minval->value : 0, maxval->value);
 592                 break;
 593         case -EACCES:
 594                 bond_opt_dep_print(bond, opt);
 595                 break;
 596         case -ENOTEMPTY:
 597                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 598                            opt->name);
 599                 break;
 600         case -EBUSY:
 601                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 602                            opt->name);
 603                 break;
 604         default:
 605                 break;
 606         }
 607 }
 608
 609 /**
 610  * __bond_opt_set - set a bonding option
 611  * @bond: target bond device
 612  * @option: option to set
 613  * @val: value to set it to
 614  *
 615  * This function is used to change the bond's option value, it can be
 616  * used for both enabling/changing an option and for disabling it. RTNL lock
 617  * must be obtained before calling this function.
 618  */
 619 int __bond_opt_set(struct bonding *bond,
 620                    unsigned int option, struct bond_opt_value *val)
 621 {
 622         const struct bond_opt_value *retval = NULL;
 623         const struct bond_option *opt;
 624         int ret = -ENOENT;
 625
 626         ASSERT_RTNL();
 627
 628         opt = bond_opt_get(option);
 629         if (WARN_ON(!val) || WARN_ON(!opt))
 630                 goto out;
 631         ret = bond_opt_check_deps(bond, opt);
 632         if (ret)
 633                 goto out;
 634         retval = bond_opt_parse(opt, val);
 635         if (!retval) {
 636                 ret = -EINVAL;
 637                 goto out;
 638         }
 639         ret = opt->set(bond, retval);
 640 out:
 641         if (ret)
 642                 bond_opt_error_interpret(bond, opt, ret, val);
 643         else
 644                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 645
 646         return ret;
 647 }
 648
 649 /**
 650  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 651  * @bond: target bond device
 652  * @option: option to set
 653  * @buf: value to set it to
 654  *
 655  * This function tries to acquire RTNL without blocking and if successful
 656  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 657  */
 658 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 659 {
 660         struct bond_opt_value optval;
 661         int ret;
 662
 663         if (!rtnl_trylock())
 664                 return restart_syscall();
 665         bond_opt_initstr(&optval, buf);
 666         ret = __bond_opt_set(bond, option, &optval);
 667         rtnl_unlock();
 668
 669         return ret;
 670 }
 671
 672 /**
 673  * bond_opt_get - get a pointer to an option
 674  * @option: option for which to return a pointer
 675  *
 676  * This function checks if option is valid and if so returns a pointer
 677  * to its entry in the bond_opts[] option array.
 678  */
 679 const struct bond_option *bond_opt_get(unsigned int option)
 680 {
 681         if (!BOND_OPT_VALID(option))
 682                 return NULL;
 683
 684         return &bond_opts[option];
 685 }
 686
 687 static int bond_option_mode_set(struct bonding *bond,
 688                                 const struct bond_opt_value *newval)
 689 {
 690         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 691                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 692                             newval->string);
 693                 /* disable arp monitoring */
 694                 bond->params.arp_interval = 0;
 695                 /* set miimon to default value */
 696                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 697                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 698                             bond->params.miimon);
 699         }
 700
 701         /* don't cache arp_validate between modes */
 702         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 703         bond->params.mode = newval->value;
 704
 705         return 0;
 706 }
 707
 708 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 709                                                          struct slave *slave)
 710 {
 711         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 712 }
 713
 714 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 715 {
 716         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 717
 718         return __bond_option_active_slave_get(bond, slave);
 719 }
 720
 721 static int bond_option_active_slave_set(struct bonding *bond,
 722                                         const struct bond_opt_value *newval)
 723 {
 724         char ifname[IFNAMSIZ] = { 0, };
 725         struct net_device *slave_dev;
 726         int ret = 0;
 727
 728         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 729         if (!strlen(ifname) || newval->string[0] == '\n') {
 730                 slave_dev = NULL;
 731         } else {
 732                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 733                 if (!slave_dev)
 734                         return -ENODEV;
 735         }
 736
 737         if (slave_dev) {
 738                 if (!netif_is_bond_slave(slave_dev)) {
 739                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 740                                    slave_dev->name);
 741                         return -EINVAL;
 742                 }
 743
 744                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 745                         netdev_err(bond->dev, "Device %s is not our slave\n",
 746                                    slave_dev->name);
 747                         return -EINVAL;
 748                 }
 749         }
 750
 751         block_netpoll_tx();
 752         /* check to see if we are clearing active */
 753         if (!slave_dev) {
 754                 netdev_info(bond->dev, "Clearing current active slave\n");
 755                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 756                 bond_select_active_slave(bond);
 757         } else {
 758                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 759                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 760
 761                 BUG_ON(!new_active);
 762
 763                 if (new_active == old_active) {
 764                         /* do nothing */
 765                         netdev_info(bond->dev, "%s is already the current active slave\n",
 766                                     new_active->dev->name);
 767                 } else {
 768                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 769                             bond_slave_is_up(new_active)) {
 770                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 771                                             new_active->dev->name);
 772                                 bond_change_active_slave(bond, new_active);
 773                         } else {
 774                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 775                                            new_active->dev->name,
 776                                            new_active->dev->name);
 777                                 ret = -EINVAL;
 778                         }
 779                 }
 780         }
 781         unblock_netpoll_tx();
 782
 783         return ret;
 784 }
 785
 786 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 787  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 788  * start it.
 789  */
 790 static int bond_option_miimon_set(struct bonding *bond,
 791                                   const struct bond_opt_value *newval)
 792 {
 793         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 794                     newval->value);
 795         bond->params.miimon = newval->value;
 796         if (bond->params.updelay)
 797                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 798                         bond->params.updelay * bond->params.miimon);
 799         if (bond->params.downdelay)
 800                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 801                             bond->params.downdelay * bond->params.miimon);
 802         if (newval->value && bond->params.arp_interval) {
 803                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 804                 bond->params.arp_interval = 0;
 805                 if (bond->params.arp_validate)
 806                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 807         }
 808         if (bond->dev->flags & IFF_UP) {
 809                 /* If the interface is up, we may need to fire off
 810                  * the MII timer. If the interface is down, the
 811                  * timer will get fired off when the open function
 812                  * is called.
 813                  */
 814                 if (!newval->value) {
 815                         cancel_delayed_work_sync(&bond->mii_work);
 816                 } else {
 817                         cancel_delayed_work_sync(&bond->arp_work);
 818                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 819                 }
 820         }
 821
 822         return 0;
 823 }
 824
 825 /* Set up and down delays. These must be multiples of the
 826  * MII monitoring value, and are stored internally as the multiplier.
 827  * Thus, we must translate to MS for the real world.
 828  */
 829 static int bond_option_updelay_set(struct bonding *bond,
 830                                    const struct bond_opt_value *newval)
 831 {
 832         int value = newval->value;
 833
 834         if (!bond->params.miimon) {
 835                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 836                 return -EPERM;
 837         }
 838         if ((value % bond->params.miimon) != 0) {
 839                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 840                             value, bond->params.miimon,
 841                             (value / bond->params.miimon) *
 842                             bond->params.miimon);
 843         }
 844         bond->params.updelay = value / bond->params.miimon;
 845         netdev_info(bond->dev, "Setting up delay to %d\n",
 846                     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                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 858                 return -EPERM;
 859         }
 860         if ((value % bond->params.miimon) != 0) {
 861                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 862                             value, bond->params.miimon,
 863                             (value / bond->params.miimon) *
 864                             bond->params.miimon);
 865         }
 866         bond->params.downdelay = value / bond->params.miimon;
 867         netdev_info(bond->dev, "Setting down delay to %d\n",
 868                     bond->params.downdelay * bond->params.miimon);
 869
 870         return 0;
 871 }
 872
 873 static int bond_option_use_carrier_set(struct bonding *bond,
 874                                        const struct bond_opt_value *newval)
 875 {
 876         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 877                     newval->value);
 878         bond->params.use_carrier = newval->value;
 879
 880         return 0;
 881 }
 882
 883 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 884  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 885  * we must start it.
 886  */
 887 static int bond_option_arp_interval_set(struct bonding *bond,
 888                                         const struct bond_opt_value *newval)
 889 {
 890         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 891                     newval->value);
 892         bond->params.arp_interval = newval->value;
 893         if (newval->value) {
 894                 if (bond->params.miimon) {
 895                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 896                         bond->params.miimon = 0;
 897                 }
 898                 if (!bond->params.arp_targets[0])
 899                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 900         }
 901         if (bond->dev->flags & IFF_UP) {
 902                 /* If the interface is up, we may need to fire off
 903                  * the ARP timer.  If the interface is down, the
 904                  * timer will get fired off when the open function
 905                  * is called.
 906                  */
 907                 if (!newval->value) {
 908                         if (bond->params.arp_validate)
 909                                 bond->recv_probe = NULL;
 910                         cancel_delayed_work_sync(&bond->arp_work);
 911                 } else {
 912                         /* arp_validate can be set only in active-backup mode */
 913                         bond->recv_probe = bond_arp_rcv;
 914                         cancel_delayed_work_sync(&bond->mii_work);
 915                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 916                 }
 917         }
 918
 919         return 0;
 920 }
 921
 922 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 923                                             __be32 target,
 924                                             unsigned long last_rx)
 925 {
 926         __be32 *targets = bond->params.arp_targets;
 927         struct list_head *iter;
 928         struct slave *slave;
 929
 930         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 931                 bond_for_each_slave(bond, slave, iter)
 932                         slave->target_last_arp_rx[slot] = last_rx;
 933                 targets[slot] = target;
 934         }
 935 }
 936
 937 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 938 {
 939         __be32 *targets = bond->params.arp_targets;
 940         int ind;
 941
 942         if (!bond_is_ip_target_ok(target)) {
 943                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 944                            &target);
 945                 return -EINVAL;
 946         }
 947
 948         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 949                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 950                            &target);
 951                 return -EINVAL;
 952         }
 953
 954         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 955         if (ind == -1) {
 956                 netdev_err(bond->dev, "ARP target table is full!\n");
 957                 return -EINVAL;
 958         }
 959
 960         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 961
 962         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 963
 964         return 0;
 965 }
 966
 967 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 968 {
 969         return _bond_option_arp_ip_target_add(bond, target);
 970 }
 971
 972 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 973 {
 974         __be32 *targets = bond->params.arp_targets;
 975         struct list_head *iter;
 976         struct slave *slave;
 977         unsigned long *targets_rx;
 978         int ind, i;
 979
 980         if (!bond_is_ip_target_ok(target)) {
 981                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
 982                            &target);
 983                 return -EINVAL;
 984         }
 985
 986         ind = bond_get_targets_ip(targets, target);
 987         if (ind == -1) {
 988                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
 989                            &target);
 990                 return -EINVAL;
 991         }
 992
 993         if (ind == 0 && !targets[1] && bond->params.arp_interval)
 994                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
 995
 996         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
 997
 998         bond_for_each_slave(bond, slave, iter) {
 999                 targets_rx = slave->target_last_arp_rx;
1000                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1001                         targets_rx[i] = targets_rx[i+1];
1002                 targets_rx[i] = 0;
1003         }
1004         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1005                 targets[i] = targets[i+1];
1006         targets[i] = 0;
1007
1008         return 0;
1009 }
1010
1011 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1012 {
1013         int i;
1014
1015         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1016                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1017 }
1018
1019 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1020                                           const struct bond_opt_value *newval)
1021 {
1022         int ret = -EPERM;
1023         __be32 target;
1024
1025         if (newval->string) {
1026                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1027                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1028                                    &target);
1029                         return ret;
1030                 }
1031                 if (newval->string[0] == '+')
1032                         ret = bond_option_arp_ip_target_add(bond, target);
1033                 else if (newval->string[0] == '-')
1034                         ret = bond_option_arp_ip_target_rem(bond, target);
1035                 else
1036                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1037         } else {
1038                 target = newval->value;
1039                 ret = bond_option_arp_ip_target_add(bond, target);
1040         }
1041
1042         return ret;
1043 }
1044
1045 static int bond_option_arp_validate_set(struct bonding *bond,
1046                                         const struct bond_opt_value *newval)
1047 {
1048         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1049                     newval->string, newval->value);
1050
1051         if (bond->dev->flags & IFF_UP) {
1052                 if (!newval->value)
1053                         bond->recv_probe = NULL;
1054                 else if (bond->params.arp_interval)
1055                         bond->recv_probe = bond_arp_rcv;
1056         }
1057         bond->params.arp_validate = newval->value;
1058
1059         return 0;
1060 }
1061
1062 static int bond_option_arp_all_targets_set(struct bonding *bond,
1063                                            const struct bond_opt_value *newval)
1064 {
1065         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1066                     newval->string, newval->value);
1067         bond->params.arp_all_targets = newval->value;
1068
1069         return 0;
1070 }
1071
1072 static int bond_option_primary_set(struct bonding *bond,
1073                                    const struct bond_opt_value *newval)
1074 {
1075         char *p, *primary = newval->string;
1076         struct list_head *iter;
1077         struct slave *slave;
1078
1079         block_netpoll_tx();
1080
1081         p = strchr(primary, '\n');
1082         if (p)
1083                 *p = '\0';
1084         /* check to see if we are clearing primary */
1085         if (!strlen(primary)) {
1086                 netdev_info(bond->dev, "Setting primary slave to None\n");
1087                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1088                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1089                 bond_select_active_slave(bond);
1090                 goto out;
1091         }
1092
1093         bond_for_each_slave(bond, slave, iter) {
1094                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1095                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1096                                     slave->dev->name);
1097                         rcu_assign_pointer(bond->primary_slave, slave);
1098                         strcpy(bond->params.primary, slave->dev->name);
1099                         bond_select_active_slave(bond);
1100                         goto out;
1101                 }
1102         }
1103
1104         if (rtnl_dereference(bond->primary_slave)) {
1105                 netdev_info(bond->dev, "Setting primary slave to None\n");
1106                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1107                 bond_select_active_slave(bond);
1108         }
1109         strncpy(bond->params.primary, primary, IFNAMSIZ);
1110         bond->params.primary[IFNAMSIZ - 1] = 0;
1111
1112         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1113                     primary, bond->dev->name);
1114
1115 out:
1116         unblock_netpoll_tx();
1117
1118         return 0;
1119 }
1120
1121 static int bond_option_primary_reselect_set(struct bonding *bond,
1122                                             const struct bond_opt_value *newval)
1123 {
1124         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1125                     newval->string, newval->value);
1126         bond->params.primary_reselect = newval->value;
1127
1128         block_netpoll_tx();
1129         bond_select_active_slave(bond);
1130         unblock_netpoll_tx();
1131
1132         return 0;
1133 }
1134
1135 static int bond_option_fail_over_mac_set(struct bonding *bond,
1136                                          const struct bond_opt_value *newval)
1137 {
1138         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1139                     newval->string, newval->value);
1140         bond->params.fail_over_mac = newval->value;
1141
1142         return 0;
1143 }
1144
1145 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1146                                             const struct bond_opt_value *newval)
1147 {
1148         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1149                     newval->string, newval->value);
1150         bond->params.xmit_policy = newval->value;
1151
1152         return 0;
1153 }
1154
1155 static int bond_option_resend_igmp_set(struct bonding *bond,
1156                                        const struct bond_opt_value *newval)
1157 {
1158         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1159                     newval->value);
1160         bond->params.resend_igmp = newval->value;
1161
1162         return 0;
1163 }
1164
1165 static int bond_option_num_peer_notif_set(struct bonding *bond,
1166                                    const struct bond_opt_value *newval)
1167 {
1168         bond->params.num_peer_notif = newval->value;
1169
1170         return 0;
1171 }
1172
1173 static int bond_option_all_slaves_active_set(struct bonding *bond,
1174                                              const struct bond_opt_value *newval)
1175 {
1176         struct list_head *iter;
1177         struct slave *slave;
1178
1179         if (newval->value == bond->params.all_slaves_active)
1180                 return 0;
1181         bond->params.all_slaves_active = newval->value;
1182         bond_for_each_slave(bond, slave, iter) {
1183                 if (!bond_is_active_slave(slave)) {
1184                         if (newval->value)
1185                                 slave->inactive = 0;
1186                         else
1187                                 slave->inactive = 1;
1188                 }
1189         }
1190
1191         return 0;
1192 }
1193
1194 static int bond_option_min_links_set(struct bonding *bond,
1195                                      const struct bond_opt_value *newval)
1196 {
1197         netdev_info(bond->dev, "Setting min links value to %llu\n",
1198                     newval->value);
1199         bond->params.min_links = newval->value;
1200         bond_set_carrier(bond);
1201
1202         return 0;
1203 }
1204
1205 static int bond_option_lp_interval_set(struct bonding *bond,
1206                                        const struct bond_opt_value *newval)
1207 {
1208         bond->params.lp_interval = newval->value;
1209
1210         return 0;
1211 }
1212
1213 static int bond_option_pps_set(struct bonding *bond,
1214                                const struct bond_opt_value *newval)
1215 {
1216         bond->params.packets_per_slave = newval->value;
1217         if (newval->value > 0) {
1218                 bond->params.reciprocal_packets_per_slave =
1219                         reciprocal_value(newval->value);
1220         } else {
1221                 /* reciprocal_packets_per_slave is unused if
1222                  * packets_per_slave is 0 or 1, just initialize it
1223                  */
1224                 bond->params.reciprocal_packets_per_slave =
1225                         (struct reciprocal_value) { 0 };
1226         }
1227
1228         return 0;
1229 }
1230
1231 static int bond_option_lacp_rate_set(struct bonding *bond,
1232                                      const struct bond_opt_value *newval)
1233 {
1234         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1235                     newval->string, newval->value);
1236         bond->params.lacp_fast = newval->value;
1237         bond_3ad_update_lacp_rate(bond);
1238
1239         return 0;
1240 }
1241
1242 static int bond_option_ad_select_set(struct bonding *bond,
1243                                      const struct bond_opt_value *newval)
1244 {
1245         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1246                     newval->string, newval->value);
1247         bond->params.ad_select = newval->value;
1248
1249         return 0;
1250 }
1251
1252 static int bond_option_queue_id_set(struct bonding *bond,
1253                                     const struct bond_opt_value *newval)
1254 {
1255         struct slave *slave, *update_slave;
1256         struct net_device *sdev;
1257         struct list_head *iter;
1258         char *delim;
1259         int ret = 0;
1260         u16 qid;
1261
1262         /* delim will point to queue id if successful */
1263         delim = strchr(newval->string, ':');
1264         if (!delim)
1265                 goto err_no_cmd;
1266
1267         /* Terminate string that points to device name and bump it
1268          * up one, so we can read the queue id there.
1269          */
1270         *delim = '\0';
1271         if (sscanf(++delim, "%hd\n", &qid) != 1)
1272                 goto err_no_cmd;
1273
1274         /* Check buffer length, valid ifname and queue id */
1275         if (!dev_valid_name(newval->string) ||
1276             qid > bond->dev->real_num_tx_queues)
1277                 goto err_no_cmd;
1278
1279         /* Get the pointer to that interface if it exists */
1280         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1281         if (!sdev)
1282                 goto err_no_cmd;
1283
1284         /* Search for thes slave and check for duplicate qids */
1285         update_slave = NULL;
1286         bond_for_each_slave(bond, slave, iter) {
1287                 if (sdev == slave->dev)
1288                         /* We don't need to check the matching
1289                          * slave for dups, since we're overwriting it
1290                          */
1291                         update_slave = slave;
1292                 else if (qid && qid == slave->queue_id) {
1293                         goto err_no_cmd;
1294                 }
1295         }
1296
1297         if (!update_slave)
1298                 goto err_no_cmd;
1299
1300         /* Actually set the qids for the slave */
1301         update_slave->queue_id = qid;
1302
1303 out:
1304         return ret;
1305
1306 err_no_cmd:
1307         netdev_info(bond->dev, "invalid input for queue_id set\n");
1308         ret = -EPERM;
1309         goto out;
1310
1311 }
1312
1313 static int bond_option_slaves_set(struct bonding *bond,
1314                                   const struct bond_opt_value *newval)
1315 {
1316         char command[IFNAMSIZ + 1] = { 0, };
1317         struct net_device *dev;
1318         char *ifname;
1319         int ret;
1320
1321         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1322         ifname = command + 1;
1323         if ((strlen(command) <= 1) ||
1324             !dev_valid_name(ifname))
1325                 goto err_no_cmd;
1326
1327         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1328         if (!dev) {
1329                 netdev_info(bond->dev, "interface %s does not exist!\n",
1330                             ifname);
1331                 ret = -ENODEV;
1332                 goto out;
1333         }
1334
1335         switch (command[0]) {
1336         case '+':
1337                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1338                 ret = bond_enslave(bond->dev, dev);
1339                 break;
1340
1341         case '-':
1342                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1343                 ret = bond_release(bond->dev, dev);
1344                 break;
1345
1346         default:
1347                 goto err_no_cmd;
1348         }
1349
1350 out:
1351         return ret;
1352
1353 err_no_cmd:
1354         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1355         ret = -EPERM;
1356         goto out;
1357 }
1358
1359 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1360                                           const struct bond_opt_value *newval)
1361 {
1362         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1363                     newval->string, newval->value);
1364         bond->params.tlb_dynamic_lb = newval->value;
1365
1366         return 0;
1367 }
1368
1369 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1370                                              const struct bond_opt_value *newval)
1371 {
1372         netdev_info(bond->dev, "Setting ad_actor_sys_prio to (%llu)\n",
1373                     newval->value);
1374
1375         bond->params.ad_actor_sys_prio = newval->value;
1376         return 0;
1377 }