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 static int bond_option_ad_actor_system_set(struct bonding *bond,
  76                                            const struct bond_opt_value *newval);
  77 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  78                                             const struct bond_opt_value *newval);
  79
  80
  81 static const struct bond_opt_value bond_mode_tbl[] = {
  82         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  83         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  84         { "balance-xor",   BOND_MODE_XOR,          0},
  85         { "broadcast",     BOND_MODE_BROADCAST,    0},
  86         { "802.3ad",       BOND_MODE_8023AD,       0},
  87         { "balance-tlb",   BOND_MODE_TLB,          0},
  88         { "balance-alb",   BOND_MODE_ALB,          0},
  89         { NULL,            -1,                     0},
  90 };
  91
  92 static const struct bond_opt_value bond_pps_tbl[] = {
  93         { "default", 1,         BOND_VALFLAG_DEFAULT},
  94         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  95         { NULL,      -1,        0},
  96 };
  97
  98 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  99         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
 100         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
 101         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
 102         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
 103         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
 104         { NULL,       -1,                       0},
 105 };
 106
 107 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 108         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 109         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 110         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 111         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 112         { "filter",             BOND_ARP_FILTER,                0},
 113         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 114         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 115         { NULL,                 -1,                             0},
 116 };
 117
 118 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 119         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 120         { "all", BOND_ARP_TARGETS_ALL, 0},
 121         { NULL,  -1,                   0},
 122 };
 123
 124 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 125         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 126         { "active", BOND_FOM_ACTIVE, 0},
 127         { "follow", BOND_FOM_FOLLOW, 0},
 128         { NULL,     -1,              0},
 129 };
 130
 131 static const struct bond_opt_value bond_intmax_tbl[] = {
 132         { "off",     0,       BOND_VALFLAG_DEFAULT},
 133         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 134         { NULL,      -1,      0}
 135 };
 136
 137 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 138         { "slow", AD_LACP_SLOW, 0},
 139         { "fast", AD_LACP_FAST, 0},
 140         { NULL,   -1,           0},
 141 };
 142
 143 static const struct bond_opt_value bond_ad_select_tbl[] = {
 144         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 145         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 146         { "count",     BOND_AD_COUNT,     0},
 147         { NULL,        -1,                0},
 148 };
 149
 150 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 151         { "off",     0,   0},
 152         { "maxval",  255, BOND_VALFLAG_MAX},
 153         { "default", 1,   BOND_VALFLAG_DEFAULT},
 154         { NULL,      -1,  0}
 155 };
 156
 157 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 158         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 159         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 160         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 161         { NULL,      -1},
 162 };
 163
 164 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 165         { "off", 0,  0},
 166         { "on",  1,  BOND_VALFLAG_DEFAULT},
 167         { NULL,  -1, 0}
 168 };
 169
 170 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 171         { "off", 0,  BOND_VALFLAG_DEFAULT},
 172         { "on",  1,  0},
 173         { NULL,  -1, 0}
 174 };
 175
 176 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 177         { "off",     0,   0},
 178         { "maxval",  255, BOND_VALFLAG_MAX},
 179         { "default", 1,   BOND_VALFLAG_DEFAULT},
 180         { NULL,      -1,  0}
 181 };
 182
 183 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 184         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 185         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 186         { NULL,      -1,      0},
 187 };
 188
 189 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 190         { "off", 0,  0},
 191         { "on",  1,  BOND_VALFLAG_DEFAULT},
 192         { NULL,  -1, 0}
 193 };
 194
 195 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 196         { "minval",  1,     BOND_VALFLAG_MIN},
 197         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 198         { NULL,      -1,    0},
 199 };
 200
 201 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 202         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 203         { "maxval",  1023,  BOND_VALFLAG_MAX},
 204         { NULL,      -1,    0},
 205 };
 206
 207 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 208         [BOND_OPT_MODE] = {
 209                 .id = BOND_OPT_MODE,
 210                 .name = "mode",
 211                 .desc = "bond device mode",
 212                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 213                 .values = bond_mode_tbl,
 214                 .set = bond_option_mode_set
 215         },
 216         [BOND_OPT_PACKETS_PER_SLAVE] = {
 217                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 218                 .name = "packets_per_slave",
 219                 .desc = "Packets to send per slave in RR mode",
 220                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 221                 .values = bond_pps_tbl,
 222                 .set = bond_option_pps_set
 223         },
 224         [BOND_OPT_XMIT_HASH] = {
 225                 .id = BOND_OPT_XMIT_HASH,
 226                 .name = "xmit_hash_policy",
 227                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 228                 .values = bond_xmit_hashtype_tbl,
 229                 .set = bond_option_xmit_hash_policy_set
 230         },
 231         [BOND_OPT_ARP_VALIDATE] = {
 232                 .id = BOND_OPT_ARP_VALIDATE,
 233                 .name = "arp_validate",
 234                 .desc = "validate src/dst of ARP probes",
 235                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 236                                BIT(BOND_MODE_ALB),
 237                 .values = bond_arp_validate_tbl,
 238                 .set = bond_option_arp_validate_set
 239         },
 240         [BOND_OPT_ARP_ALL_TARGETS] = {
 241                 .id = BOND_OPT_ARP_ALL_TARGETS,
 242                 .name = "arp_all_targets",
 243                 .desc = "fail on any/all arp targets timeout",
 244                 .values = bond_arp_all_targets_tbl,
 245                 .set = bond_option_arp_all_targets_set
 246         },
 247         [BOND_OPT_FAIL_OVER_MAC] = {
 248                 .id = BOND_OPT_FAIL_OVER_MAC,
 249                 .name = "fail_over_mac",
 250                 .desc = "For active-backup, do not set all slaves to the same MAC",
 251                 .flags = BOND_OPTFLAG_NOSLAVES,
 252                 .values = bond_fail_over_mac_tbl,
 253                 .set = bond_option_fail_over_mac_set
 254         },
 255         [BOND_OPT_ARP_INTERVAL] = {
 256                 .id = BOND_OPT_ARP_INTERVAL,
 257                 .name = "arp_interval",
 258                 .desc = "arp interval in milliseconds",
 259                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 260                                BIT(BOND_MODE_ALB),
 261                 .values = bond_intmax_tbl,
 262                 .set = bond_option_arp_interval_set
 263         },
 264         [BOND_OPT_ARP_TARGETS] = {
 265                 .id = BOND_OPT_ARP_TARGETS,
 266                 .name = "arp_ip_target",
 267                 .desc = "arp targets in n.n.n.n form",
 268                 .flags = BOND_OPTFLAG_RAWVAL,
 269                 .set = bond_option_arp_ip_targets_set
 270         },
 271         [BOND_OPT_DOWNDELAY] = {
 272                 .id = BOND_OPT_DOWNDELAY,
 273                 .name = "downdelay",
 274                 .desc = "Delay before considering link down, in milliseconds",
 275                 .values = bond_intmax_tbl,
 276                 .set = bond_option_downdelay_set
 277         },
 278         [BOND_OPT_UPDELAY] = {
 279                 .id = BOND_OPT_UPDELAY,
 280                 .name = "updelay",
 281                 .desc = "Delay before considering link up, in milliseconds",
 282                 .values = bond_intmax_tbl,
 283                 .set = bond_option_updelay_set
 284         },
 285         [BOND_OPT_LACP_RATE] = {
 286                 .id = BOND_OPT_LACP_RATE,
 287                 .name = "lacp_rate",
 288                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 289                 .flags = BOND_OPTFLAG_IFDOWN,
 290                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 291                 .values = bond_lacp_rate_tbl,
 292                 .set = bond_option_lacp_rate_set
 293         },
 294         [BOND_OPT_MINLINKS] = {
 295                 .id = BOND_OPT_MINLINKS,
 296                 .name = "min_links",
 297                 .desc = "Minimum number of available links before turning on carrier",
 298                 .values = bond_intmax_tbl,
 299                 .set = bond_option_min_links_set
 300         },
 301         [BOND_OPT_AD_SELECT] = {
 302                 .id = BOND_OPT_AD_SELECT,
 303                 .name = "ad_select",
 304                 .desc = "803.ad aggregation selection logic",
 305                 .flags = BOND_OPTFLAG_IFDOWN,
 306                 .values = bond_ad_select_tbl,
 307                 .set = bond_option_ad_select_set
 308         },
 309         [BOND_OPT_NUM_PEER_NOTIF] = {
 310                 .id = BOND_OPT_NUM_PEER_NOTIF,
 311                 .name = "num_unsol_na",
 312                 .desc = "Number of peer notifications to send on failover event",
 313                 .values = bond_num_peer_notif_tbl,
 314                 .set = bond_option_num_peer_notif_set
 315         },
 316         [BOND_OPT_MIIMON] = {
 317                 .id = BOND_OPT_MIIMON,
 318                 .name = "miimon",
 319                 .desc = "Link check interval in milliseconds",
 320                 .values = bond_intmax_tbl,
 321                 .set = bond_option_miimon_set
 322         },
 323         [BOND_OPT_PRIMARY] = {
 324                 .id = BOND_OPT_PRIMARY,
 325                 .name = "primary",
 326                 .desc = "Primary network device to use",
 327                 .flags = BOND_OPTFLAG_RAWVAL,
 328                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 329                                                 BIT(BOND_MODE_TLB) |
 330                                                 BIT(BOND_MODE_ALB)),
 331                 .set = bond_option_primary_set
 332         },
 333         [BOND_OPT_PRIMARY_RESELECT] = {
 334                 .id = BOND_OPT_PRIMARY_RESELECT,
 335                 .name = "primary_reselect",
 336                 .desc = "Reselect primary slave once it comes up",
 337                 .values = bond_primary_reselect_tbl,
 338                 .set = bond_option_primary_reselect_set
 339         },
 340         [BOND_OPT_USE_CARRIER] = {
 341                 .id = BOND_OPT_USE_CARRIER,
 342                 .name = "use_carrier",
 343                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 344                 .values = bond_use_carrier_tbl,
 345                 .set = bond_option_use_carrier_set
 346         },
 347         [BOND_OPT_ACTIVE_SLAVE] = {
 348                 .id = BOND_OPT_ACTIVE_SLAVE,
 349                 .name = "active_slave",
 350                 .desc = "Currently active slave",
 351                 .flags = BOND_OPTFLAG_RAWVAL,
 352                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 353                                                 BIT(BOND_MODE_TLB) |
 354                                                 BIT(BOND_MODE_ALB)),
 355                 .set = bond_option_active_slave_set
 356         },
 357         [BOND_OPT_QUEUE_ID] = {
 358                 .id = BOND_OPT_QUEUE_ID,
 359                 .name = "queue_id",
 360                 .desc = "Set queue id of a slave",
 361                 .flags = BOND_OPTFLAG_RAWVAL,
 362                 .set = bond_option_queue_id_set
 363         },
 364         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 365                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 366                 .name = "all_slaves_active",
 367                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 368                 .values = bond_all_slaves_active_tbl,
 369                 .set = bond_option_all_slaves_active_set
 370         },
 371         [BOND_OPT_RESEND_IGMP] = {
 372                 .id = BOND_OPT_RESEND_IGMP,
 373                 .name = "resend_igmp",
 374                 .desc = "Number of IGMP membership reports to send on link failure",
 375                 .values = bond_resend_igmp_tbl,
 376                 .set = bond_option_resend_igmp_set
 377         },
 378         [BOND_OPT_LP_INTERVAL] = {
 379                 .id = BOND_OPT_LP_INTERVAL,
 380                 .name = "lp_interval",
 381                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 382                 .values = bond_lp_interval_tbl,
 383                 .set = bond_option_lp_interval_set
 384         },
 385         [BOND_OPT_SLAVES] = {
 386                 .id = BOND_OPT_SLAVES,
 387                 .name = "slaves",
 388                 .desc = "Slave membership management",
 389                 .flags = BOND_OPTFLAG_RAWVAL,
 390                 .set = bond_option_slaves_set
 391         },
 392         [BOND_OPT_TLB_DYNAMIC_LB] = {
 393                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 394                 .name = "tlb_dynamic_lb",
 395                 .desc = "Enable dynamic flow shuffling",
 396                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
 397                 .values = bond_tlb_dynamic_lb_tbl,
 398                 .flags = BOND_OPTFLAG_IFDOWN,
 399                 .set = bond_option_tlb_dynamic_lb_set,
 400         },
 401         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 402                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 403                 .name = "ad_actor_sys_prio",
 404                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 405                 .flags = BOND_OPTFLAG_IFDOWN,
 406                 .values = bond_ad_actor_sys_prio_tbl,
 407                 .set = bond_option_ad_actor_sys_prio_set,
 408         },
 409         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 410                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 411                 .name = "ad_actor_system",
 412                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 413                 .flags = BOND_OPTFLAG_RAWVAL | BOND_OPTFLAG_IFDOWN,
 414                 .set = bond_option_ad_actor_system_set,
 415         },
 416         [BOND_OPT_AD_USER_PORT_KEY] = {
 417                 .id = BOND_OPT_AD_USER_PORT_KEY,
 418                 .name = "ad_user_port_key",
 419                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 420                 .flags = BOND_OPTFLAG_IFDOWN,
 421                 .values = bond_ad_user_port_key_tbl,
 422                 .set = bond_option_ad_user_port_key_set,
 423         }
 424 };
 425
 426 /* Searches for an option by name */
 427 const struct bond_option *bond_opt_get_by_name(const char *name)
 428 {
 429         const struct bond_option *opt;
 430         int option;
 431
 432         for (option = 0; option < BOND_OPT_LAST; option++) {
 433                 opt = bond_opt_get(option);
 434                 if (opt && !strcmp(opt->name, name))
 435                         return opt;
 436         }
 437
 438         return NULL;
 439 }
 440
 441 /* Searches for a value in opt's values[] table */
 442 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 443 {
 444         const struct bond_option *opt;
 445         int i;
 446
 447         opt = bond_opt_get(option);
 448         if (WARN_ON(!opt))
 449                 return NULL;
 450         for (i = 0; opt->values && opt->values[i].string; i++)
 451                 if (opt->values[i].value == val)
 452                         return &opt->values[i];
 453
 454         return NULL;
 455 }
 456
 457 /* Searches for a value in opt's values[] table which matches the flagmask */
 458 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 459                                                  u32 flagmask)
 460 {
 461         int i;
 462
 463         for (i = 0; opt->values && opt->values[i].string; i++)
 464                 if (opt->values[i].flags & flagmask)
 465                         return &opt->values[i];
 466
 467         return NULL;
 468 }
 469
 470 /* If maxval is missing then there's no range to check. In case minval is
 471  * missing then it's considered to be 0.
 472  */
 473 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 474 {
 475         const struct bond_opt_value *minval, *maxval;
 476
 477         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 478         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 479         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 480                 return false;
 481
 482         return true;
 483 }
 484
 485 /**
 486  * bond_opt_parse - parse option value
 487  * @opt: the option to parse against
 488  * @val: value to parse
 489  *
 490  * This function tries to extract the value from @val and check if it's
 491  * a possible match for the option and returns NULL if a match isn't found,
 492  * or the struct_opt_value that matched. It also strips the new line from
 493  * @val->string if it's present.
 494  */
 495 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 496                                             struct bond_opt_value *val)
 497 {
 498         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 499         const struct bond_opt_value *tbl;
 500         const struct bond_opt_value *ret = NULL;
 501         bool checkval;
 502         int i, rv;
 503
 504         /* No parsing if the option wants a raw val */
 505         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 506                 return val;
 507
 508         tbl = opt->values;
 509         if (!tbl)
 510                 goto out;
 511
 512         /* ULLONG_MAX is used to bypass string processing */
 513         checkval = val->value != ULLONG_MAX;
 514         if (!checkval) {
 515                 if (!val->string)
 516                         goto out;
 517                 p = strchr(val->string, '\n');
 518                 if (p)
 519                         *p = '\0';
 520                 for (p = val->string; *p; p++)
 521                         if (!(isdigit(*p) || isspace(*p)))
 522                                 break;
 523                 /* The following code extracts the string to match or the value
 524                  * and sets checkval appropriately
 525                  */
 526                 if (*p) {
 527                         rv = sscanf(val->string, "%32s", valstr);
 528                 } else {
 529                         rv = sscanf(val->string, "%llu", &val->value);
 530                         checkval = true;
 531                 }
 532                 if (!rv)
 533                         goto out;
 534         }
 535
 536         for (i = 0; tbl[i].string; i++) {
 537                 /* Check for exact match */
 538                 if (checkval) {
 539                         if (val->value == tbl[i].value)
 540                                 ret = &tbl[i];
 541                 } else {
 542                         if (!strcmp(valstr, "default") &&
 543                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 544                                 ret = &tbl[i];
 545
 546                         if (!strcmp(valstr, tbl[i].string))
 547                                 ret = &tbl[i];
 548                 }
 549                 /* Found an exact match */
 550                 if (ret)
 551                         goto out;
 552         }
 553         /* Possible range match */
 554         if (checkval && bond_opt_check_range(opt, val->value))
 555                 ret = val;
 556 out:
 557         return ret;
 558 }
 559
 560 /* Check opt's dependencies against bond mode and currently set options */
 561 static int bond_opt_check_deps(struct bonding *bond,
 562                                const struct bond_option *opt)
 563 {
 564         struct bond_params *params = &bond->params;
 565
 566         if (test_bit(params->mode, &opt->unsuppmodes))
 567                 return -EACCES;
 568         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 569                 return -ENOTEMPTY;
 570         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 571                 return -EBUSY;
 572
 573         return 0;
 574 }
 575
 576 static void bond_opt_dep_print(struct bonding *bond,
 577                                const struct bond_option *opt)
 578 {
 579         const struct bond_opt_value *modeval;
 580         struct bond_params *params;
 581
 582         params = &bond->params;
 583         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 584         if (test_bit(params->mode, &opt->unsuppmodes))
 585                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 586                            opt->name, modeval->string, modeval->value);
 587 }
 588
 589 static void bond_opt_error_interpret(struct bonding *bond,
 590                                      const struct bond_option *opt,
 591                                      int error, const struct bond_opt_value *val)
 592 {
 593         const struct bond_opt_value *minval, *maxval;
 594         char *p;
 595
 596         switch (error) {
 597         case -EINVAL:
 598                 if (val) {
 599                         if (val->string) {
 600                                 /* sometimes RAWVAL opts may have new lines */
 601                                 p = strchr(val->string, '\n');
 602                                 if (p)
 603                                         *p = '\0';
 604                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 605                                            opt->name, val->string);
 606                         } else {
 607                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 608                                            opt->name, val->value);
 609                         }
 610                 }
 611                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 612                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 613                 if (!maxval)
 614                         break;
 615                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 616                            opt->name, minval ? minval->value : 0, maxval->value);
 617                 break;
 618         case -EACCES:
 619                 bond_opt_dep_print(bond, opt);
 620                 break;
 621         case -ENOTEMPTY:
 622                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 623                            opt->name);
 624                 break;
 625         case -EBUSY:
 626                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 627                            opt->name);
 628                 break;
 629         default:
 630                 break;
 631         }
 632 }
 633
 634 /**
 635  * __bond_opt_set - set a bonding option
 636  * @bond: target bond device
 637  * @option: option to set
 638  * @val: value to set it to
 639  *
 640  * This function is used to change the bond's option value, it can be
 641  * used for both enabling/changing an option and for disabling it. RTNL lock
 642  * must be obtained before calling this function.
 643  */
 644 int __bond_opt_set(struct bonding *bond,
 645                    unsigned int option, struct bond_opt_value *val)
 646 {
 647         const struct bond_opt_value *retval = NULL;
 648         const struct bond_option *opt;
 649         int ret = -ENOENT;
 650
 651         ASSERT_RTNL();
 652
 653         opt = bond_opt_get(option);
 654         if (WARN_ON(!val) || WARN_ON(!opt))
 655                 goto out;
 656         ret = bond_opt_check_deps(bond, opt);
 657         if (ret)
 658                 goto out;
 659         retval = bond_opt_parse(opt, val);
 660         if (!retval) {
 661                 ret = -EINVAL;
 662                 goto out;
 663         }
 664         ret = opt->set(bond, retval);
 665 out:
 666         if (ret)
 667                 bond_opt_error_interpret(bond, opt, ret, val);
 668         else if (bond->dev->reg_state == NETREG_REGISTERED)
 669                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 670
 671         return ret;
 672 }
 673
 674 /**
 675  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 676  * @bond: target bond device
 677  * @option: option to set
 678  * @buf: value to set it to
 679  *
 680  * This function tries to acquire RTNL without blocking and if successful
 681  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 682  */
 683 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 684 {
 685         struct bond_opt_value optval;
 686         int ret;
 687
 688         if (!rtnl_trylock())
 689                 return restart_syscall();
 690         bond_opt_initstr(&optval, buf);
 691         ret = __bond_opt_set(bond, option, &optval);
 692         rtnl_unlock();
 693
 694         return ret;
 695 }
 696
 697 /**
 698  * bond_opt_get - get a pointer to an option
 699  * @option: option for which to return a pointer
 700  *
 701  * This function checks if option is valid and if so returns a pointer
 702  * to its entry in the bond_opts[] option array.
 703  */
 704 const struct bond_option *bond_opt_get(unsigned int option)
 705 {
 706         if (!BOND_OPT_VALID(option))
 707                 return NULL;
 708
 709         return &bond_opts[option];
 710 }
 711
 712 static int bond_option_mode_set(struct bonding *bond,
 713                                 const struct bond_opt_value *newval)
 714 {
 715         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 716                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 717                             newval->string);
 718                 /* disable arp monitoring */
 719                 bond->params.arp_interval = 0;
 720                 /* set miimon to default value */
 721                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 722                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 723                             bond->params.miimon);
 724         }
 725
 726         /* don't cache arp_validate between modes */
 727         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 728         bond->params.mode = newval->value;
 729
 730         return 0;
 731 }
 732
 733 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 734                                                          struct slave *slave)
 735 {
 736         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 737 }
 738
 739 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 740 {
 741         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 742
 743         return __bond_option_active_slave_get(bond, slave);
 744 }
 745
 746 static int bond_option_active_slave_set(struct bonding *bond,
 747                                         const struct bond_opt_value *newval)
 748 {
 749         char ifname[IFNAMSIZ] = { 0, };
 750         struct net_device *slave_dev;
 751         int ret = 0;
 752
 753         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 754         if (!strlen(ifname) || newval->string[0] == '\n') {
 755                 slave_dev = NULL;
 756         } else {
 757                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 758                 if (!slave_dev)
 759                         return -ENODEV;
 760         }
 761
 762         if (slave_dev) {
 763                 if (!netif_is_bond_slave(slave_dev)) {
 764                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 765                                    slave_dev->name);
 766                         return -EINVAL;
 767                 }
 768
 769                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 770                         netdev_err(bond->dev, "Device %s is not our slave\n",
 771                                    slave_dev->name);
 772                         return -EINVAL;
 773                 }
 774         }
 775
 776         block_netpoll_tx();
 777         /* check to see if we are clearing active */
 778         if (!slave_dev) {
 779                 netdev_info(bond->dev, "Clearing current active slave\n");
 780                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 781                 bond_select_active_slave(bond);
 782         } else {
 783                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 784                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 785
 786                 BUG_ON(!new_active);
 787
 788                 if (new_active == old_active) {
 789                         /* do nothing */
 790                         netdev_info(bond->dev, "%s is already the current active slave\n",
 791                                     new_active->dev->name);
 792                 } else {
 793                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 794                             bond_slave_is_up(new_active)) {
 795                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 796                                             new_active->dev->name);
 797                                 bond_change_active_slave(bond, new_active);
 798                         } else {
 799                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 800                                            new_active->dev->name,
 801                                            new_active->dev->name);
 802                                 ret = -EINVAL;
 803                         }
 804                 }
 805         }
 806         unblock_netpoll_tx();
 807
 808         return ret;
 809 }
 810
 811 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 812  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 813  * start it.
 814  */
 815 static int bond_option_miimon_set(struct bonding *bond,
 816                                   const struct bond_opt_value *newval)
 817 {
 818         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 819                     newval->value);
 820         bond->params.miimon = newval->value;
 821         if (bond->params.updelay)
 822                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 823                         bond->params.updelay * bond->params.miimon);
 824         if (bond->params.downdelay)
 825                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 826                             bond->params.downdelay * bond->params.miimon);
 827         if (newval->value && bond->params.arp_interval) {
 828                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 829                 bond->params.arp_interval = 0;
 830                 if (bond->params.arp_validate)
 831                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 832         }
 833         if (bond->dev->flags & IFF_UP) {
 834                 /* If the interface is up, we may need to fire off
 835                  * the MII timer. If the interface is down, the
 836                  * timer will get fired off when the open function
 837                  * is called.
 838                  */
 839                 if (!newval->value) {
 840                         cancel_delayed_work_sync(&bond->mii_work);
 841                 } else {
 842                         cancel_delayed_work_sync(&bond->arp_work);
 843                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 844                 }
 845         }
 846
 847         return 0;
 848 }
 849
 850 /* Set up and down delays. These must be multiples of the
 851  * MII monitoring value, and are stored internally as the multiplier.
 852  * Thus, we must translate to MS for the real world.
 853  */
 854 static int bond_option_updelay_set(struct bonding *bond,
 855                                    const struct bond_opt_value *newval)
 856 {
 857         int value = newval->value;
 858
 859         if (!bond->params.miimon) {
 860                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 861                 return -EPERM;
 862         }
 863         if ((value % bond->params.miimon) != 0) {
 864                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 865                             value, bond->params.miimon,
 866                             (value / bond->params.miimon) *
 867                             bond->params.miimon);
 868         }
 869         bond->params.updelay = value / bond->params.miimon;
 870         netdev_info(bond->dev, "Setting up delay to %d\n",
 871                     bond->params.updelay * bond->params.miimon);
 872
 873         return 0;
 874 }
 875
 876 static int bond_option_downdelay_set(struct bonding *bond,
 877                                      const struct bond_opt_value *newval)
 878 {
 879         int value = newval->value;
 880
 881         if (!bond->params.miimon) {
 882                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 883                 return -EPERM;
 884         }
 885         if ((value % bond->params.miimon) != 0) {
 886                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 887                             value, bond->params.miimon,
 888                             (value / bond->params.miimon) *
 889                             bond->params.miimon);
 890         }
 891         bond->params.downdelay = value / bond->params.miimon;
 892         netdev_info(bond->dev, "Setting down delay to %d\n",
 893                     bond->params.downdelay * bond->params.miimon);
 894
 895         return 0;
 896 }
 897
 898 static int bond_option_use_carrier_set(struct bonding *bond,
 899                                        const struct bond_opt_value *newval)
 900 {
 901         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 902                     newval->value);
 903         bond->params.use_carrier = newval->value;
 904
 905         return 0;
 906 }
 907
 908 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 909  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 910  * we must start it.
 911  */
 912 static int bond_option_arp_interval_set(struct bonding *bond,
 913                                         const struct bond_opt_value *newval)
 914 {
 915         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 916                     newval->value);
 917         bond->params.arp_interval = newval->value;
 918         if (newval->value) {
 919                 if (bond->params.miimon) {
 920                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 921                         bond->params.miimon = 0;
 922                 }
 923                 if (!bond->params.arp_targets[0])
 924                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 925         }
 926         if (bond->dev->flags & IFF_UP) {
 927                 /* If the interface is up, we may need to fire off
 928                  * the ARP timer.  If the interface is down, the
 929                  * timer will get fired off when the open function
 930                  * is called.
 931                  */
 932                 if (!newval->value) {
 933                         if (bond->params.arp_validate)
 934                                 bond->recv_probe = NULL;
 935                         cancel_delayed_work_sync(&bond->arp_work);
 936                 } else {
 937                         /* arp_validate can be set only in active-backup mode */
 938                         bond->recv_probe = bond_arp_rcv;
 939                         cancel_delayed_work_sync(&bond->mii_work);
 940                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 941                 }
 942         }
 943
 944         return 0;
 945 }
 946
 947 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 948                                             __be32 target,
 949                                             unsigned long last_rx)
 950 {
 951         __be32 *targets = bond->params.arp_targets;
 952         struct list_head *iter;
 953         struct slave *slave;
 954
 955         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 956                 bond_for_each_slave(bond, slave, iter)
 957                         slave->target_last_arp_rx[slot] = last_rx;
 958                 targets[slot] = target;
 959         }
 960 }
 961
 962 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 963 {
 964         __be32 *targets = bond->params.arp_targets;
 965         int ind;
 966
 967         if (!bond_is_ip_target_ok(target)) {
 968                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 969                            &target);
 970                 return -EINVAL;
 971         }
 972
 973         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 974                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 975                            &target);
 976                 return -EINVAL;
 977         }
 978
 979         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 980         if (ind == -1) {
 981                 netdev_err(bond->dev, "ARP target table is full!\n");
 982                 return -EINVAL;
 983         }
 984
 985         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 986
 987         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 988
 989         return 0;
 990 }
 991
 992 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 993 {
 994         return _bond_option_arp_ip_target_add(bond, target);
 995 }
 996
 997 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 998 {
 999         __be32 *targets = bond->params.arp_targets;
1000         struct list_head *iter;
1001         struct slave *slave;
1002         unsigned long *targets_rx;
1003         int ind, i;
1004
1005         if (!bond_is_ip_target_ok(target)) {
1006                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1007                            &target);
1008                 return -EINVAL;
1009         }
1010
1011         ind = bond_get_targets_ip(targets, target);
1012         if (ind == -1) {
1013                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1014                            &target);
1015                 return -EINVAL;
1016         }
1017
1018         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1019                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1020
1021         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1022
1023         bond_for_each_slave(bond, slave, iter) {
1024                 targets_rx = slave->target_last_arp_rx;
1025                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1026                         targets_rx[i] = targets_rx[i+1];
1027                 targets_rx[i] = 0;
1028         }
1029         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1030                 targets[i] = targets[i+1];
1031         targets[i] = 0;
1032
1033         return 0;
1034 }
1035
1036 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1037 {
1038         int i;
1039
1040         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1041                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1042 }
1043
1044 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1045                                           const struct bond_opt_value *newval)
1046 {
1047         int ret = -EPERM;
1048         __be32 target;
1049
1050         if (newval->string) {
1051                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1052                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1053                                    &target);
1054                         return ret;
1055                 }
1056                 if (newval->string[0] == '+')
1057                         ret = bond_option_arp_ip_target_add(bond, target);
1058                 else if (newval->string[0] == '-')
1059                         ret = bond_option_arp_ip_target_rem(bond, target);
1060                 else
1061                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1062         } else {
1063                 target = newval->value;
1064                 ret = bond_option_arp_ip_target_add(bond, target);
1065         }
1066
1067         return ret;
1068 }
1069
1070 static int bond_option_arp_validate_set(struct bonding *bond,
1071                                         const struct bond_opt_value *newval)
1072 {
1073         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1074                     newval->string, newval->value);
1075
1076         if (bond->dev->flags & IFF_UP) {
1077                 if (!newval->value)
1078                         bond->recv_probe = NULL;
1079                 else if (bond->params.arp_interval)
1080                         bond->recv_probe = bond_arp_rcv;
1081         }
1082         bond->params.arp_validate = newval->value;
1083
1084         return 0;
1085 }
1086
1087 static int bond_option_arp_all_targets_set(struct bonding *bond,
1088                                            const struct bond_opt_value *newval)
1089 {
1090         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1091                     newval->string, newval->value);
1092         bond->params.arp_all_targets = newval->value;
1093
1094         return 0;
1095 }
1096
1097 static int bond_option_primary_set(struct bonding *bond,
1098                                    const struct bond_opt_value *newval)
1099 {
1100         char *p, *primary = newval->string;
1101         struct list_head *iter;
1102         struct slave *slave;
1103
1104         block_netpoll_tx();
1105
1106         p = strchr(primary, '\n');
1107         if (p)
1108                 *p = '\0';
1109         /* check to see if we are clearing primary */
1110         if (!strlen(primary)) {
1111                 netdev_info(bond->dev, "Setting primary slave to None\n");
1112                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1113                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1114                 bond_select_active_slave(bond);
1115                 goto out;
1116         }
1117
1118         bond_for_each_slave(bond, slave, iter) {
1119                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1120                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1121                                     slave->dev->name);
1122                         rcu_assign_pointer(bond->primary_slave, slave);
1123                         strcpy(bond->params.primary, slave->dev->name);
1124                         bond_select_active_slave(bond);
1125                         goto out;
1126                 }
1127         }
1128
1129         if (rtnl_dereference(bond->primary_slave)) {
1130                 netdev_info(bond->dev, "Setting primary slave to None\n");
1131                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1132                 bond_select_active_slave(bond);
1133         }
1134         strncpy(bond->params.primary, primary, IFNAMSIZ);
1135         bond->params.primary[IFNAMSIZ - 1] = 0;
1136
1137         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1138                     primary, bond->dev->name);
1139
1140 out:
1141         unblock_netpoll_tx();
1142
1143         return 0;
1144 }
1145
1146 static int bond_option_primary_reselect_set(struct bonding *bond,
1147                                             const struct bond_opt_value *newval)
1148 {
1149         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1150                     newval->string, newval->value);
1151         bond->params.primary_reselect = newval->value;
1152
1153         block_netpoll_tx();
1154         bond_select_active_slave(bond);
1155         unblock_netpoll_tx();
1156
1157         return 0;
1158 }
1159
1160 static int bond_option_fail_over_mac_set(struct bonding *bond,
1161                                          const struct bond_opt_value *newval)
1162 {
1163         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1164                     newval->string, newval->value);
1165         bond->params.fail_over_mac = newval->value;
1166
1167         return 0;
1168 }
1169
1170 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1171                                             const struct bond_opt_value *newval)
1172 {
1173         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1174                     newval->string, newval->value);
1175         bond->params.xmit_policy = newval->value;
1176
1177         return 0;
1178 }
1179
1180 static int bond_option_resend_igmp_set(struct bonding *bond,
1181                                        const struct bond_opt_value *newval)
1182 {
1183         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1184                     newval->value);
1185         bond->params.resend_igmp = newval->value;
1186
1187         return 0;
1188 }
1189
1190 static int bond_option_num_peer_notif_set(struct bonding *bond,
1191                                    const struct bond_opt_value *newval)
1192 {
1193         bond->params.num_peer_notif = newval->value;
1194
1195         return 0;
1196 }
1197
1198 static int bond_option_all_slaves_active_set(struct bonding *bond,
1199                                              const struct bond_opt_value *newval)
1200 {
1201         struct list_head *iter;
1202         struct slave *slave;
1203
1204         if (newval->value == bond->params.all_slaves_active)
1205                 return 0;
1206         bond->params.all_slaves_active = newval->value;
1207         bond_for_each_slave(bond, slave, iter) {
1208                 if (!bond_is_active_slave(slave)) {
1209                         if (newval->value)
1210                                 slave->inactive = 0;
1211                         else
1212                                 slave->inactive = 1;
1213                 }
1214         }
1215
1216         return 0;
1217 }
1218
1219 static int bond_option_min_links_set(struct bonding *bond,
1220                                      const struct bond_opt_value *newval)
1221 {
1222         netdev_info(bond->dev, "Setting min links value to %llu\n",
1223                     newval->value);
1224         bond->params.min_links = newval->value;
1225         bond_set_carrier(bond);
1226
1227         return 0;
1228 }
1229
1230 static int bond_option_lp_interval_set(struct bonding *bond,
1231                                        const struct bond_opt_value *newval)
1232 {
1233         bond->params.lp_interval = newval->value;
1234
1235         return 0;
1236 }
1237
1238 static int bond_option_pps_set(struct bonding *bond,
1239                                const struct bond_opt_value *newval)
1240 {
1241         bond->params.packets_per_slave = newval->value;
1242         if (newval->value > 0) {
1243                 bond->params.reciprocal_packets_per_slave =
1244                         reciprocal_value(newval->value);
1245         } else {
1246                 /* reciprocal_packets_per_slave is unused if
1247                  * packets_per_slave is 0 or 1, just initialize it
1248                  */
1249                 bond->params.reciprocal_packets_per_slave =
1250                         (struct reciprocal_value) { 0 };
1251         }
1252
1253         return 0;
1254 }
1255
1256 static int bond_option_lacp_rate_set(struct bonding *bond,
1257                                      const struct bond_opt_value *newval)
1258 {
1259         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1260                     newval->string, newval->value);
1261         bond->params.lacp_fast = newval->value;
1262         bond_3ad_update_lacp_rate(bond);
1263
1264         return 0;
1265 }
1266
1267 static int bond_option_ad_select_set(struct bonding *bond,
1268                                      const struct bond_opt_value *newval)
1269 {
1270         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1271                     newval->string, newval->value);
1272         bond->params.ad_select = newval->value;
1273
1274         return 0;
1275 }
1276
1277 static int bond_option_queue_id_set(struct bonding *bond,
1278                                     const struct bond_opt_value *newval)
1279 {
1280         struct slave *slave, *update_slave;
1281         struct net_device *sdev;
1282         struct list_head *iter;
1283         char *delim;
1284         int ret = 0;
1285         u16 qid;
1286
1287         /* delim will point to queue id if successful */
1288         delim = strchr(newval->string, ':');
1289         if (!delim)
1290                 goto err_no_cmd;
1291
1292         /* Terminate string that points to device name and bump it
1293          * up one, so we can read the queue id there.
1294          */
1295         *delim = '\0';
1296         if (sscanf(++delim, "%hd\n", &qid) != 1)
1297                 goto err_no_cmd;
1298
1299         /* Check buffer length, valid ifname and queue id */
1300         if (!dev_valid_name(newval->string) ||
1301             qid > bond->dev->real_num_tx_queues)
1302                 goto err_no_cmd;
1303
1304         /* Get the pointer to that interface if it exists */
1305         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1306         if (!sdev)
1307                 goto err_no_cmd;
1308
1309         /* Search for thes slave and check for duplicate qids */
1310         update_slave = NULL;
1311         bond_for_each_slave(bond, slave, iter) {
1312                 if (sdev == slave->dev)
1313                         /* We don't need to check the matching
1314                          * slave for dups, since we're overwriting it
1315                          */
1316                         update_slave = slave;
1317                 else if (qid && qid == slave->queue_id) {
1318                         goto err_no_cmd;
1319                 }
1320         }
1321
1322         if (!update_slave)
1323                 goto err_no_cmd;
1324
1325         /* Actually set the qids for the slave */
1326         update_slave->queue_id = qid;
1327
1328 out:
1329         return ret;
1330
1331 err_no_cmd:
1332         netdev_info(bond->dev, "invalid input for queue_id set\n");
1333         ret = -EPERM;
1334         goto out;
1335
1336 }
1337
1338 static int bond_option_slaves_set(struct bonding *bond,
1339                                   const struct bond_opt_value *newval)
1340 {
1341         char command[IFNAMSIZ + 1] = { 0, };
1342         struct net_device *dev;
1343         char *ifname;
1344         int ret;
1345
1346         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1347         ifname = command + 1;
1348         if ((strlen(command) <= 1) ||
1349             !dev_valid_name(ifname))
1350                 goto err_no_cmd;
1351
1352         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1353         if (!dev) {
1354                 netdev_info(bond->dev, "interface %s does not exist!\n",
1355                             ifname);
1356                 ret = -ENODEV;
1357                 goto out;
1358         }
1359
1360         switch (command[0]) {
1361         case '+':
1362                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1363                 ret = bond_enslave(bond->dev, dev);
1364                 break;
1365
1366         case '-':
1367                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1368                 ret = bond_release(bond->dev, dev);
1369                 break;
1370
1371         default:
1372                 goto err_no_cmd;
1373         }
1374
1375 out:
1376         return ret;
1377
1378 err_no_cmd:
1379         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1380         ret = -EPERM;
1381         goto out;
1382 }
1383
1384 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1385                                           const struct bond_opt_value *newval)
1386 {
1387         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1388                     newval->string, newval->value);
1389         bond->params.tlb_dynamic_lb = newval->value;
1390
1391         return 0;
1392 }
1393
1394 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1395                                              const struct bond_opt_value *newval)
1396 {
1397         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1398                     newval->value);
1399
1400         bond->params.ad_actor_sys_prio = newval->value;
1401         return 0;
1402 }
1403
1404 static int bond_option_ad_actor_system_set(struct bonding *bond,
1405                                            const struct bond_opt_value *newval)
1406 {
1407         u8 macaddr[ETH_ALEN];
1408         u8 *mac;
1409         int i;
1410
1411         if (newval->string) {
1412                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1413                            &macaddr[0], &macaddr[1], &macaddr[2],
1414                            &macaddr[3], &macaddr[4], &macaddr[5]);
1415                 if (i != ETH_ALEN)
1416                         goto err;
1417                 mac = macaddr;
1418         } else {
1419                 mac = (u8 *)&newval->value;
1420         }
1421
1422         if (!is_valid_ether_addr(mac))
1423                 goto err;
1424
1425         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1426         ether_addr_copy(bond->params.ad_actor_system, mac);
1427         return 0;
1428
1429 err:
1430         netdev_err(bond->dev, "Invalid MAC address.\n");
1431         return -EINVAL;
1432 }
1433
1434 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1435                                             const struct bond_opt_value *newval)
1436 {
1437         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1438                     newval->value);
1439
1440         bond->params.ad_user_port_key = newval->value;
1441         return 0;
1442 }