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