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         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 425                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 426                 .name = "num_grat_arp",
 427                 .desc = "Number of peer notifications to send on failover event",
 428                 .values = bond_num_peer_notif_tbl,
 429                 .set = bond_option_num_peer_notif_set
 430         }
 431 };
 432
 433 /* Searches for an option by name */
 434 const struct bond_option *bond_opt_get_by_name(const char *name)
 435 {
 436         const struct bond_option *opt;
 437         int option;
 438
 439         for (option = 0; option < BOND_OPT_LAST; option++) {
 440                 opt = bond_opt_get(option);
 441                 if (opt && !strcmp(opt->name, name))
 442                         return opt;
 443         }
 444
 445         return NULL;
 446 }
 447
 448 /* Searches for a value in opt's values[] table */
 449 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 450 {
 451         const struct bond_option *opt;
 452         int i;
 453
 454         opt = bond_opt_get(option);
 455         if (WARN_ON(!opt))
 456                 return NULL;
 457         for (i = 0; opt->values && opt->values[i].string; i++)
 458                 if (opt->values[i].value == val)
 459                         return &opt->values[i];
 460
 461         return NULL;
 462 }
 463
 464 /* Searches for a value in opt's values[] table which matches the flagmask */
 465 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 466                                                  u32 flagmask)
 467 {
 468         int i;
 469
 470         for (i = 0; opt->values && opt->values[i].string; i++)
 471                 if (opt->values[i].flags & flagmask)
 472                         return &opt->values[i];
 473
 474         return NULL;
 475 }
 476
 477 /* If maxval is missing then there's no range to check. In case minval is
 478  * missing then it's considered to be 0.
 479  */
 480 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 481 {
 482         const struct bond_opt_value *minval, *maxval;
 483
 484         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 485         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 486         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 487                 return false;
 488
 489         return true;
 490 }
 491
 492 /**
 493  * bond_opt_parse - parse option value
 494  * @opt: the option to parse against
 495  * @val: value to parse
 496  *
 497  * This function tries to extract the value from @val and check if it's
 498  * a possible match for the option and returns NULL if a match isn't found,
 499  * or the struct_opt_value that matched. It also strips the new line from
 500  * @val->string if it's present.
 501  */
 502 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 503                                             struct bond_opt_value *val)
 504 {
 505         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 506         const struct bond_opt_value *tbl;
 507         const struct bond_opt_value *ret = NULL;
 508         bool checkval;
 509         int i, rv;
 510
 511         /* No parsing if the option wants a raw val */
 512         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 513                 return val;
 514
 515         tbl = opt->values;
 516         if (!tbl)
 517                 goto out;
 518
 519         /* ULLONG_MAX is used to bypass string processing */
 520         checkval = val->value != ULLONG_MAX;
 521         if (!checkval) {
 522                 if (!val->string)
 523                         goto out;
 524                 p = strchr(val->string, '\n');
 525                 if (p)
 526                         *p = '\0';
 527                 for (p = val->string; *p; p++)
 528                         if (!(isdigit(*p) || isspace(*p)))
 529                                 break;
 530                 /* The following code extracts the string to match or the value
 531                  * and sets checkval appropriately
 532                  */
 533                 if (*p) {
 534                         rv = sscanf(val->string, "%32s", valstr);
 535                 } else {
 536                         rv = sscanf(val->string, "%llu", &val->value);
 537                         checkval = true;
 538                 }
 539                 if (!rv)
 540                         goto out;
 541         }
 542
 543         for (i = 0; tbl[i].string; i++) {
 544                 /* Check for exact match */
 545                 if (checkval) {
 546                         if (val->value == tbl[i].value)
 547                                 ret = &tbl[i];
 548                 } else {
 549                         if (!strcmp(valstr, "default") &&
 550                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 551                                 ret = &tbl[i];
 552
 553                         if (!strcmp(valstr, tbl[i].string))
 554                                 ret = &tbl[i];
 555                 }
 556                 /* Found an exact match */
 557                 if (ret)
 558                         goto out;
 559         }
 560         /* Possible range match */
 561         if (checkval && bond_opt_check_range(opt, val->value))
 562                 ret = val;
 563 out:
 564         return ret;
 565 }
 566
 567 /* Check opt's dependencies against bond mode and currently set options */
 568 static int bond_opt_check_deps(struct bonding *bond,
 569                                const struct bond_option *opt)
 570 {
 571         struct bond_params *params = &bond->params;
 572
 573         if (test_bit(params->mode, &opt->unsuppmodes))
 574                 return -EACCES;
 575         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 576                 return -ENOTEMPTY;
 577         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 578                 return -EBUSY;
 579
 580         return 0;
 581 }
 582
 583 static void bond_opt_dep_print(struct bonding *bond,
 584                                const struct bond_option *opt)
 585 {
 586         const struct bond_opt_value *modeval;
 587         struct bond_params *params;
 588
 589         params = &bond->params;
 590         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 591         if (test_bit(params->mode, &opt->unsuppmodes))
 592                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 593                            opt->name, modeval->string, modeval->value);
 594 }
 595
 596 static void bond_opt_error_interpret(struct bonding *bond,
 597                                      const struct bond_option *opt,
 598                                      int error, const struct bond_opt_value *val)
 599 {
 600         const struct bond_opt_value *minval, *maxval;
 601         char *p;
 602
 603         switch (error) {
 604         case -EINVAL:
 605                 if (val) {
 606                         if (val->string) {
 607                                 /* sometimes RAWVAL opts may have new lines */
 608                                 p = strchr(val->string, '\n');
 609                                 if (p)
 610                                         *p = '\0';
 611                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 612                                            opt->name, val->string);
 613                         } else {
 614                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 615                                            opt->name, val->value);
 616                         }
 617                 }
 618                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 619                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 620                 if (!maxval)
 621                         break;
 622                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 623                            opt->name, minval ? minval->value : 0, maxval->value);
 624                 break;
 625         case -EACCES:
 626                 bond_opt_dep_print(bond, opt);
 627                 break;
 628         case -ENOTEMPTY:
 629                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 630                            opt->name);
 631                 break;
 632         case -EBUSY:
 633                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 634                            opt->name);
 635                 break;
 636         default:
 637                 break;
 638         }
 639 }
 640
 641 /**
 642  * __bond_opt_set - set a bonding option
 643  * @bond: target bond device
 644  * @option: option to set
 645  * @val: value to set it to
 646  *
 647  * This function is used to change the bond's option value, it can be
 648  * used for both enabling/changing an option and for disabling it. RTNL lock
 649  * must be obtained before calling this function.
 650  */
 651 int __bond_opt_set(struct bonding *bond,
 652                    unsigned int option, struct bond_opt_value *val)
 653 {
 654         const struct bond_opt_value *retval = NULL;
 655         const struct bond_option *opt;
 656         int ret = -ENOENT;
 657
 658         ASSERT_RTNL();
 659
 660         opt = bond_opt_get(option);
 661         if (WARN_ON(!val) || WARN_ON(!opt))
 662                 goto out;
 663         ret = bond_opt_check_deps(bond, opt);
 664         if (ret)
 665                 goto out;
 666         retval = bond_opt_parse(opt, val);
 667         if (!retval) {
 668                 ret = -EINVAL;
 669                 goto out;
 670         }
 671         ret = opt->set(bond, retval);
 672 out:
 673         if (ret)
 674                 bond_opt_error_interpret(bond, opt, ret, val);
 675         else if (bond->dev->reg_state == NETREG_REGISTERED)
 676                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 677
 678         return ret;
 679 }
 680
 681 /**
 682  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 683  * @bond: target bond device
 684  * @option: option to set
 685  * @buf: value to set it to
 686  *
 687  * This function tries to acquire RTNL without blocking and if successful
 688  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 689  */
 690 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 691 {
 692         struct bond_opt_value optval;
 693         int ret;
 694
 695         if (!rtnl_trylock())
 696                 return restart_syscall();
 697         bond_opt_initstr(&optval, buf);
 698         ret = __bond_opt_set(bond, option, &optval);
 699         rtnl_unlock();
 700
 701         return ret;
 702 }
 703
 704 /**
 705  * bond_opt_get - get a pointer to an option
 706  * @option: option for which to return a pointer
 707  *
 708  * This function checks if option is valid and if so returns a pointer
 709  * to its entry in the bond_opts[] option array.
 710  */
 711 const struct bond_option *bond_opt_get(unsigned int option)
 712 {
 713         if (!BOND_OPT_VALID(option))
 714                 return NULL;
 715
 716         return &bond_opts[option];
 717 }
 718
 719 static int bond_option_mode_set(struct bonding *bond,
 720                                 const struct bond_opt_value *newval)
 721 {
 722         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 723                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 724                             newval->string);
 725                 /* disable arp monitoring */
 726                 bond->params.arp_interval = 0;
 727                 /* set miimon to default value */
 728                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 729                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 730                             bond->params.miimon);
 731         }
 732
 733         /* don't cache arp_validate between modes */
 734         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 735         bond->params.mode = newval->value;
 736
 737         return 0;
 738 }
 739
 740 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 741                                                          struct slave *slave)
 742 {
 743         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
 744 }
 745
 746 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 747 {
 748         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 749
 750         return __bond_option_active_slave_get(bond, slave);
 751 }
 752
 753 static int bond_option_active_slave_set(struct bonding *bond,
 754                                         const struct bond_opt_value *newval)
 755 {
 756         char ifname[IFNAMSIZ] = { 0, };
 757         struct net_device *slave_dev;
 758         int ret = 0;
 759
 760         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 761         if (!strlen(ifname) || newval->string[0] == '\n') {
 762                 slave_dev = NULL;
 763         } else {
 764                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 765                 if (!slave_dev)
 766                         return -ENODEV;
 767         }
 768
 769         if (slave_dev) {
 770                 if (!netif_is_bond_slave(slave_dev)) {
 771                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 772                                    slave_dev->name);
 773                         return -EINVAL;
 774                 }
 775
 776                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 777                         netdev_err(bond->dev, "Device %s is not our slave\n",
 778                                    slave_dev->name);
 779                         return -EINVAL;
 780                 }
 781         }
 782
 783         block_netpoll_tx();
 784         /* check to see if we are clearing active */
 785         if (!slave_dev) {
 786                 netdev_info(bond->dev, "Clearing current active slave\n");
 787                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 788                 bond_select_active_slave(bond);
 789         } else {
 790                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 791                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 792
 793                 BUG_ON(!new_active);
 794
 795                 if (new_active == old_active) {
 796                         /* do nothing */
 797                         netdev_info(bond->dev, "%s is already the current active slave\n",
 798                                     new_active->dev->name);
 799                 } else {
 800                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 801                             bond_slave_is_up(new_active)) {
 802                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 803                                             new_active->dev->name);
 804                                 bond_change_active_slave(bond, new_active);
 805                         } else {
 806                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 807                                            new_active->dev->name,
 808                                            new_active->dev->name);
 809                                 ret = -EINVAL;
 810                         }
 811                 }
 812         }
 813         unblock_netpoll_tx();
 814
 815         return ret;
 816 }
 817
 818 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 819  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 820  * start it.
 821  */
 822 static int bond_option_miimon_set(struct bonding *bond,
 823                                   const struct bond_opt_value *newval)
 824 {
 825         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 826                     newval->value);
 827         bond->params.miimon = newval->value;
 828         if (bond->params.updelay)
 829                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 830                         bond->params.updelay * bond->params.miimon);
 831         if (bond->params.downdelay)
 832                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 833                             bond->params.downdelay * bond->params.miimon);
 834         if (newval->value && bond->params.arp_interval) {
 835                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 836                 bond->params.arp_interval = 0;
 837                 if (bond->params.arp_validate)
 838                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 839         }
 840         if (bond->dev->flags & IFF_UP) {
 841                 /* If the interface is up, we may need to fire off
 842                  * the MII timer. If the interface is down, the
 843                  * timer will get fired off when the open function
 844                  * is called.
 845                  */
 846                 if (!newval->value) {
 847                         cancel_delayed_work_sync(&bond->mii_work);
 848                 } else {
 849                         cancel_delayed_work_sync(&bond->arp_work);
 850                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 851                 }
 852         }
 853
 854         return 0;
 855 }
 856
 857 /* Set up and down delays. These must be multiples of the
 858  * MII monitoring value, and are stored internally as the multiplier.
 859  * Thus, we must translate to MS for the real world.
 860  */
 861 static int bond_option_updelay_set(struct bonding *bond,
 862                                    const struct bond_opt_value *newval)
 863 {
 864         int value = newval->value;
 865
 866         if (!bond->params.miimon) {
 867                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 868                 return -EPERM;
 869         }
 870         if ((value % bond->params.miimon) != 0) {
 871                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 872                             value, bond->params.miimon,
 873                             (value / bond->params.miimon) *
 874                             bond->params.miimon);
 875         }
 876         bond->params.updelay = value / bond->params.miimon;
 877         netdev_info(bond->dev, "Setting up delay to %d\n",
 878                     bond->params.updelay * bond->params.miimon);
 879
 880         return 0;
 881 }
 882
 883 static int bond_option_downdelay_set(struct bonding *bond,
 884                                      const struct bond_opt_value *newval)
 885 {
 886         int value = newval->value;
 887
 888         if (!bond->params.miimon) {
 889                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 890                 return -EPERM;
 891         }
 892         if ((value % bond->params.miimon) != 0) {
 893                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 894                             value, bond->params.miimon,
 895                             (value / bond->params.miimon) *
 896                             bond->params.miimon);
 897         }
 898         bond->params.downdelay = value / bond->params.miimon;
 899         netdev_info(bond->dev, "Setting down delay to %d\n",
 900                     bond->params.downdelay * bond->params.miimon);
 901
 902         return 0;
 903 }
 904
 905 static int bond_option_use_carrier_set(struct bonding *bond,
 906                                        const struct bond_opt_value *newval)
 907 {
 908         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 909                     newval->value);
 910         bond->params.use_carrier = newval->value;
 911
 912         return 0;
 913 }
 914
 915 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 916  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 917  * we must start it.
 918  */
 919 static int bond_option_arp_interval_set(struct bonding *bond,
 920                                         const struct bond_opt_value *newval)
 921 {
 922         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 923                     newval->value);
 924         bond->params.arp_interval = newval->value;
 925         if (newval->value) {
 926                 if (bond->params.miimon) {
 927                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 928                         bond->params.miimon = 0;
 929                 }
 930                 if (!bond->params.arp_targets[0])
 931                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 932         }
 933         if (bond->dev->flags & IFF_UP) {
 934                 /* If the interface is up, we may need to fire off
 935                  * the ARP timer.  If the interface is down, the
 936                  * timer will get fired off when the open function
 937                  * is called.
 938                  */
 939                 if (!newval->value) {
 940                         if (bond->params.arp_validate)
 941                                 bond->recv_probe = NULL;
 942                         cancel_delayed_work_sync(&bond->arp_work);
 943                 } else {
 944                         /* arp_validate can be set only in active-backup mode */
 945                         bond->recv_probe = bond_arp_rcv;
 946                         cancel_delayed_work_sync(&bond->mii_work);
 947                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 948                 }
 949         }
 950
 951         return 0;
 952 }
 953
 954 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 955                                             __be32 target,
 956                                             unsigned long last_rx)
 957 {
 958         __be32 *targets = bond->params.arp_targets;
 959         struct list_head *iter;
 960         struct slave *slave;
 961
 962         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 963                 bond_for_each_slave(bond, slave, iter)
 964                         slave->target_last_arp_rx[slot] = last_rx;
 965                 targets[slot] = target;
 966         }
 967 }
 968
 969 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 970 {
 971         __be32 *targets = bond->params.arp_targets;
 972         int ind;
 973
 974         if (!bond_is_ip_target_ok(target)) {
 975                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 976                            &target);
 977                 return -EINVAL;
 978         }
 979
 980         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 981                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 982                            &target);
 983                 return -EINVAL;
 984         }
 985
 986         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 987         if (ind == -1) {
 988                 netdev_err(bond->dev, "ARP target table is full!\n");
 989                 return -EINVAL;
 990         }
 991
 992         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 993
 994         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 995
 996         return 0;
 997 }
 998
 999 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1000 {
1001         return _bond_option_arp_ip_target_add(bond, target);
1002 }
1003
1004 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1005 {
1006         __be32 *targets = bond->params.arp_targets;
1007         struct list_head *iter;
1008         struct slave *slave;
1009         unsigned long *targets_rx;
1010         int ind, i;
1011
1012         if (!bond_is_ip_target_ok(target)) {
1013                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1014                            &target);
1015                 return -EINVAL;
1016         }
1017
1018         ind = bond_get_targets_ip(targets, target);
1019         if (ind == -1) {
1020                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1021                            &target);
1022                 return -EINVAL;
1023         }
1024
1025         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1026                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1027
1028         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1029
1030         bond_for_each_slave(bond, slave, iter) {
1031                 targets_rx = slave->target_last_arp_rx;
1032                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1033                         targets_rx[i] = targets_rx[i+1];
1034                 targets_rx[i] = 0;
1035         }
1036         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1037                 targets[i] = targets[i+1];
1038         targets[i] = 0;
1039
1040         return 0;
1041 }
1042
1043 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1044 {
1045         int i;
1046
1047         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1048                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1049 }
1050
1051 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1052                                           const struct bond_opt_value *newval)
1053 {
1054         int ret = -EPERM;
1055         __be32 target;
1056
1057         if (newval->string) {
1058                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1059                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1060                                    &target);
1061                         return ret;
1062                 }
1063                 if (newval->string[0] == '+')
1064                         ret = bond_option_arp_ip_target_add(bond, target);
1065                 else if (newval->string[0] == '-')
1066                         ret = bond_option_arp_ip_target_rem(bond, target);
1067                 else
1068                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1069         } else {
1070                 target = newval->value;
1071                 ret = bond_option_arp_ip_target_add(bond, target);
1072         }
1073
1074         return ret;
1075 }
1076
1077 static int bond_option_arp_validate_set(struct bonding *bond,
1078                                         const struct bond_opt_value *newval)
1079 {
1080         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1081                     newval->string, newval->value);
1082
1083         if (bond->dev->flags & IFF_UP) {
1084                 if (!newval->value)
1085                         bond->recv_probe = NULL;
1086                 else if (bond->params.arp_interval)
1087                         bond->recv_probe = bond_arp_rcv;
1088         }
1089         bond->params.arp_validate = newval->value;
1090
1091         return 0;
1092 }
1093
1094 static int bond_option_arp_all_targets_set(struct bonding *bond,
1095                                            const struct bond_opt_value *newval)
1096 {
1097         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1098                     newval->string, newval->value);
1099         bond->params.arp_all_targets = newval->value;
1100
1101         return 0;
1102 }
1103
1104 static int bond_option_primary_set(struct bonding *bond,
1105                                    const struct bond_opt_value *newval)
1106 {
1107         char *p, *primary = newval->string;
1108         struct list_head *iter;
1109         struct slave *slave;
1110
1111         block_netpoll_tx();
1112
1113         p = strchr(primary, '\n');
1114         if (p)
1115                 *p = '\0';
1116         /* check to see if we are clearing primary */
1117         if (!strlen(primary)) {
1118                 netdev_info(bond->dev, "Setting primary slave to None\n");
1119                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1120                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1121                 bond_select_active_slave(bond);
1122                 goto out;
1123         }
1124
1125         bond_for_each_slave(bond, slave, iter) {
1126                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1127                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1128                                     slave->dev->name);
1129                         rcu_assign_pointer(bond->primary_slave, slave);
1130                         strcpy(bond->params.primary, slave->dev->name);
1131                         bond_select_active_slave(bond);
1132                         goto out;
1133                 }
1134         }
1135
1136         if (rtnl_dereference(bond->primary_slave)) {
1137                 netdev_info(bond->dev, "Setting primary slave to None\n");
1138                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1139                 bond_select_active_slave(bond);
1140         }
1141         strncpy(bond->params.primary, primary, IFNAMSIZ);
1142         bond->params.primary[IFNAMSIZ - 1] = 0;
1143
1144         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1145                     primary, bond->dev->name);
1146
1147 out:
1148         unblock_netpoll_tx();
1149
1150         return 0;
1151 }
1152
1153 static int bond_option_primary_reselect_set(struct bonding *bond,
1154                                             const struct bond_opt_value *newval)
1155 {
1156         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1157                     newval->string, newval->value);
1158         bond->params.primary_reselect = newval->value;
1159
1160         block_netpoll_tx();
1161         bond_select_active_slave(bond);
1162         unblock_netpoll_tx();
1163
1164         return 0;
1165 }
1166
1167 static int bond_option_fail_over_mac_set(struct bonding *bond,
1168                                          const struct bond_opt_value *newval)
1169 {
1170         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1171                     newval->string, newval->value);
1172         bond->params.fail_over_mac = newval->value;
1173
1174         return 0;
1175 }
1176
1177 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1178                                             const struct bond_opt_value *newval)
1179 {
1180         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1181                     newval->string, newval->value);
1182         bond->params.xmit_policy = newval->value;
1183
1184         return 0;
1185 }
1186
1187 static int bond_option_resend_igmp_set(struct bonding *bond,
1188                                        const struct bond_opt_value *newval)
1189 {
1190         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1191                     newval->value);
1192         bond->params.resend_igmp = newval->value;
1193
1194         return 0;
1195 }
1196
1197 static int bond_option_num_peer_notif_set(struct bonding *bond,
1198                                    const struct bond_opt_value *newval)
1199 {
1200         bond->params.num_peer_notif = newval->value;
1201
1202         return 0;
1203 }
1204
1205 static int bond_option_all_slaves_active_set(struct bonding *bond,
1206                                              const struct bond_opt_value *newval)
1207 {
1208         struct list_head *iter;
1209         struct slave *slave;
1210
1211         if (newval->value == bond->params.all_slaves_active)
1212                 return 0;
1213         bond->params.all_slaves_active = newval->value;
1214         bond_for_each_slave(bond, slave, iter) {
1215                 if (!bond_is_active_slave(slave)) {
1216                         if (newval->value)
1217                                 slave->inactive = 0;
1218                         else
1219                                 slave->inactive = 1;
1220                 }
1221         }
1222
1223         return 0;
1224 }
1225
1226 static int bond_option_min_links_set(struct bonding *bond,
1227                                      const struct bond_opt_value *newval)
1228 {
1229         netdev_info(bond->dev, "Setting min links value to %llu\n",
1230                     newval->value);
1231         bond->params.min_links = newval->value;
1232         bond_set_carrier(bond);
1233
1234         return 0;
1235 }
1236
1237 static int bond_option_lp_interval_set(struct bonding *bond,
1238                                        const struct bond_opt_value *newval)
1239 {
1240         bond->params.lp_interval = newval->value;
1241
1242         return 0;
1243 }
1244
1245 static int bond_option_pps_set(struct bonding *bond,
1246                                const struct bond_opt_value *newval)
1247 {
1248         bond->params.packets_per_slave = newval->value;
1249         if (newval->value > 0) {
1250                 bond->params.reciprocal_packets_per_slave =
1251                         reciprocal_value(newval->value);
1252         } else {
1253                 /* reciprocal_packets_per_slave is unused if
1254                  * packets_per_slave is 0 or 1, just initialize it
1255                  */
1256                 bond->params.reciprocal_packets_per_slave =
1257                         (struct reciprocal_value) { 0 };
1258         }
1259
1260         return 0;
1261 }
1262
1263 static int bond_option_lacp_rate_set(struct bonding *bond,
1264                                      const struct bond_opt_value *newval)
1265 {
1266         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1267                     newval->string, newval->value);
1268         bond->params.lacp_fast = newval->value;
1269         bond_3ad_update_lacp_rate(bond);
1270
1271         return 0;
1272 }
1273
1274 static int bond_option_ad_select_set(struct bonding *bond,
1275                                      const struct bond_opt_value *newval)
1276 {
1277         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1278                     newval->string, newval->value);
1279         bond->params.ad_select = newval->value;
1280
1281         return 0;
1282 }
1283
1284 static int bond_option_queue_id_set(struct bonding *bond,
1285                                     const struct bond_opt_value *newval)
1286 {
1287         struct slave *slave, *update_slave;
1288         struct net_device *sdev;
1289         struct list_head *iter;
1290         char *delim;
1291         int ret = 0;
1292         u16 qid;
1293
1294         /* delim will point to queue id if successful */
1295         delim = strchr(newval->string, ':');
1296         if (!delim)
1297                 goto err_no_cmd;
1298
1299         /* Terminate string that points to device name and bump it
1300          * up one, so we can read the queue id there.
1301          */
1302         *delim = '\0';
1303         if (sscanf(++delim, "%hd\n", &qid) != 1)
1304                 goto err_no_cmd;
1305
1306         /* Check buffer length, valid ifname and queue id */
1307         if (!dev_valid_name(newval->string) ||
1308             qid > bond->dev->real_num_tx_queues)
1309                 goto err_no_cmd;
1310
1311         /* Get the pointer to that interface if it exists */
1312         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1313         if (!sdev)
1314                 goto err_no_cmd;
1315
1316         /* Search for thes slave and check for duplicate qids */
1317         update_slave = NULL;
1318         bond_for_each_slave(bond, slave, iter) {
1319                 if (sdev == slave->dev)
1320                         /* We don't need to check the matching
1321                          * slave for dups, since we're overwriting it
1322                          */
1323                         update_slave = slave;
1324                 else if (qid && qid == slave->queue_id) {
1325                         goto err_no_cmd;
1326                 }
1327         }
1328
1329         if (!update_slave)
1330                 goto err_no_cmd;
1331
1332         /* Actually set the qids for the slave */
1333         update_slave->queue_id = qid;
1334
1335 out:
1336         return ret;
1337
1338 err_no_cmd:
1339         netdev_info(bond->dev, "invalid input for queue_id set\n");
1340         ret = -EPERM;
1341         goto out;
1342
1343 }
1344
1345 static int bond_option_slaves_set(struct bonding *bond,
1346                                   const struct bond_opt_value *newval)
1347 {
1348         char command[IFNAMSIZ + 1] = { 0, };
1349         struct net_device *dev;
1350         char *ifname;
1351         int ret;
1352
1353         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1354         ifname = command + 1;
1355         if ((strlen(command) <= 1) ||
1356             !dev_valid_name(ifname))
1357                 goto err_no_cmd;
1358
1359         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1360         if (!dev) {
1361                 netdev_info(bond->dev, "interface %s does not exist!\n",
1362                             ifname);
1363                 ret = -ENODEV;
1364                 goto out;
1365         }
1366
1367         switch (command[0]) {
1368         case '+':
1369                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1370                 ret = bond_enslave(bond->dev, dev);
1371                 break;
1372
1373         case '-':
1374                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1375                 ret = bond_release(bond->dev, dev);
1376                 break;
1377
1378         default:
1379                 goto err_no_cmd;
1380         }
1381
1382 out:
1383         return ret;
1384
1385 err_no_cmd:
1386         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1387         ret = -EPERM;
1388         goto out;
1389 }
1390
1391 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1392                                           const struct bond_opt_value *newval)
1393 {
1394         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1395                     newval->string, newval->value);
1396         bond->params.tlb_dynamic_lb = newval->value;
1397
1398         return 0;
1399 }
1400
1401 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1402                                              const struct bond_opt_value *newval)
1403 {
1404         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1405                     newval->value);
1406
1407         bond->params.ad_actor_sys_prio = newval->value;
1408         return 0;
1409 }
1410
1411 static int bond_option_ad_actor_system_set(struct bonding *bond,
1412                                            const struct bond_opt_value *newval)
1413 {
1414         u8 macaddr[ETH_ALEN];
1415         u8 *mac;
1416         int i;
1417
1418         if (newval->string) {
1419                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1420                            &macaddr[0], &macaddr[1], &macaddr[2],
1421                            &macaddr[3], &macaddr[4], &macaddr[5]);
1422                 if (i != ETH_ALEN)
1423                         goto err;
1424                 mac = macaddr;
1425         } else {
1426                 mac = (u8 *)&newval->value;
1427         }
1428
1429         if (!is_valid_ether_addr(mac))
1430                 goto err;
1431
1432         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1433         ether_addr_copy(bond->params.ad_actor_system, mac);
1434         return 0;
1435
1436 err:
1437         netdev_err(bond->dev, "Invalid MAC address.\n");
1438         return -EINVAL;
1439 }
1440
1441 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1442                                             const struct bond_opt_value *newval)
1443 {
1444         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1445                     newval->value);
1446
1447         bond->params.ad_user_port_key = newval->value;
1448         return 0;
1449 }