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 int bond_option_active_slave_set(struct bonding *bond,
 741                                         const struct bond_opt_value *newval)
 742 {
 743         char ifname[IFNAMSIZ] = { 0, };
 744         struct net_device *slave_dev;
 745         int ret = 0;
 746
 747         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 748         if (!strlen(ifname) || newval->string[0] == '\n') {
 749                 slave_dev = NULL;
 750         } else {
 751                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 752                 if (!slave_dev)
 753                         return -ENODEV;
 754         }
 755
 756         if (slave_dev) {
 757                 if (!netif_is_bond_slave(slave_dev)) {
 758                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 759                                    slave_dev->name);
 760                         return -EINVAL;
 761                 }
 762
 763                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 764                         netdev_err(bond->dev, "Device %s is not our slave\n",
 765                                    slave_dev->name);
 766                         return -EINVAL;
 767                 }
 768         }
 769
 770         block_netpoll_tx();
 771         /* check to see if we are clearing active */
 772         if (!slave_dev) {
 773                 netdev_info(bond->dev, "Clearing current active slave\n");
 774                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 775                 bond_select_active_slave(bond);
 776         } else {
 777                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 778                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 779
 780                 BUG_ON(!new_active);
 781
 782                 if (new_active == old_active) {
 783                         /* do nothing */
 784                         netdev_info(bond->dev, "%s is already the current active slave\n",
 785                                     new_active->dev->name);
 786                 } else {
 787                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 788                             bond_slave_is_up(new_active)) {
 789                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 790                                             new_active->dev->name);
 791                                 bond_change_active_slave(bond, new_active);
 792                         } else {
 793                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 794                                            new_active->dev->name,
 795                                            new_active->dev->name);
 796                                 ret = -EINVAL;
 797                         }
 798                 }
 799         }
 800         unblock_netpoll_tx();
 801
 802         return ret;
 803 }
 804
 805 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 806  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 807  * start it.
 808  */
 809 static int bond_option_miimon_set(struct bonding *bond,
 810                                   const struct bond_opt_value *newval)
 811 {
 812         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 813                     newval->value);
 814         bond->params.miimon = newval->value;
 815         if (bond->params.updelay)
 816                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 817                         bond->params.updelay * bond->params.miimon);
 818         if (bond->params.downdelay)
 819                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 820                             bond->params.downdelay * bond->params.miimon);
 821         if (newval->value && bond->params.arp_interval) {
 822                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 823                 bond->params.arp_interval = 0;
 824                 if (bond->params.arp_validate)
 825                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 826         }
 827         if (bond->dev->flags & IFF_UP) {
 828                 /* If the interface is up, we may need to fire off
 829                  * the MII timer. If the interface is down, the
 830                  * timer will get fired off when the open function
 831                  * is called.
 832                  */
 833                 if (!newval->value) {
 834                         cancel_delayed_work_sync(&bond->mii_work);
 835                 } else {
 836                         cancel_delayed_work_sync(&bond->arp_work);
 837                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 838                 }
 839         }
 840
 841         return 0;
 842 }
 843
 844 /* Set up and down delays. These must be multiples of the
 845  * MII monitoring value, and are stored internally as the multiplier.
 846  * Thus, we must translate to MS for the real world.
 847  */
 848 static int bond_option_updelay_set(struct bonding *bond,
 849                                    const struct bond_opt_value *newval)
 850 {
 851         int value = newval->value;
 852
 853         if (!bond->params.miimon) {
 854                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 855                 return -EPERM;
 856         }
 857         if ((value % bond->params.miimon) != 0) {
 858                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 859                             value, bond->params.miimon,
 860                             (value / bond->params.miimon) *
 861                             bond->params.miimon);
 862         }
 863         bond->params.updelay = value / bond->params.miimon;
 864         netdev_info(bond->dev, "Setting up delay to %d\n",
 865                     bond->params.updelay * bond->params.miimon);
 866
 867         return 0;
 868 }
 869
 870 static int bond_option_downdelay_set(struct bonding *bond,
 871                                      const struct bond_opt_value *newval)
 872 {
 873         int value = newval->value;
 874
 875         if (!bond->params.miimon) {
 876                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 877                 return -EPERM;
 878         }
 879         if ((value % bond->params.miimon) != 0) {
 880                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 881                             value, bond->params.miimon,
 882                             (value / bond->params.miimon) *
 883                             bond->params.miimon);
 884         }
 885         bond->params.downdelay = value / bond->params.miimon;
 886         netdev_info(bond->dev, "Setting down delay to %d\n",
 887                     bond->params.downdelay * bond->params.miimon);
 888
 889         return 0;
 890 }
 891
 892 static int bond_option_use_carrier_set(struct bonding *bond,
 893                                        const struct bond_opt_value *newval)
 894 {
 895         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 896                     newval->value);
 897         bond->params.use_carrier = newval->value;
 898
 899         return 0;
 900 }
 901
 902 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 903  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 904  * we must start it.
 905  */
 906 static int bond_option_arp_interval_set(struct bonding *bond,
 907                                         const struct bond_opt_value *newval)
 908 {
 909         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 910                     newval->value);
 911         bond->params.arp_interval = newval->value;
 912         if (newval->value) {
 913                 if (bond->params.miimon) {
 914                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 915                         bond->params.miimon = 0;
 916                 }
 917                 if (!bond->params.arp_targets[0])
 918                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 919         }
 920         if (bond->dev->flags & IFF_UP) {
 921                 /* If the interface is up, we may need to fire off
 922                  * the ARP timer.  If the interface is down, the
 923                  * timer will get fired off when the open function
 924                  * is called.
 925                  */
 926                 if (!newval->value) {
 927                         if (bond->params.arp_validate)
 928                                 bond->recv_probe = NULL;
 929                         cancel_delayed_work_sync(&bond->arp_work);
 930                 } else {
 931                         /* arp_validate can be set only in active-backup mode */
 932                         bond->recv_probe = bond_arp_rcv;
 933                         cancel_delayed_work_sync(&bond->mii_work);
 934                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 935                 }
 936         }
 937
 938         return 0;
 939 }
 940
 941 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 942                                             __be32 target,
 943                                             unsigned long last_rx)
 944 {
 945         __be32 *targets = bond->params.arp_targets;
 946         struct list_head *iter;
 947         struct slave *slave;
 948
 949         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 950                 bond_for_each_slave(bond, slave, iter)
 951                         slave->target_last_arp_rx[slot] = last_rx;
 952                 targets[slot] = target;
 953         }
 954 }
 955
 956 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 957 {
 958         __be32 *targets = bond->params.arp_targets;
 959         int ind;
 960
 961         if (!bond_is_ip_target_ok(target)) {
 962                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 963                            &target);
 964                 return -EINVAL;
 965         }
 966
 967         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 968                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 969                            &target);
 970                 return -EINVAL;
 971         }
 972
 973         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 974         if (ind == -1) {
 975                 netdev_err(bond->dev, "ARP target table is full!\n");
 976                 return -EINVAL;
 977         }
 978
 979         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 980
 981         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 982
 983         return 0;
 984 }
 985
 986 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 987 {
 988         return _bond_option_arp_ip_target_add(bond, target);
 989 }
 990
 991 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 992 {
 993         __be32 *targets = bond->params.arp_targets;
 994         struct list_head *iter;
 995         struct slave *slave;
 996         unsigned long *targets_rx;
 997         int ind, i;
 998
 999         if (!bond_is_ip_target_ok(target)) {
1000                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1001                            &target);
1002                 return -EINVAL;
1003         }
1004
1005         ind = bond_get_targets_ip(targets, target);
1006         if (ind == -1) {
1007                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1008                            &target);
1009                 return -EINVAL;
1010         }
1011
1012         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1013                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1014
1015         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1016
1017         bond_for_each_slave(bond, slave, iter) {
1018                 targets_rx = slave->target_last_arp_rx;
1019                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1020                         targets_rx[i] = targets_rx[i+1];
1021                 targets_rx[i] = 0;
1022         }
1023         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1024                 targets[i] = targets[i+1];
1025         targets[i] = 0;
1026
1027         return 0;
1028 }
1029
1030 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1031 {
1032         int i;
1033
1034         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1035                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1036 }
1037
1038 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1039                                           const struct bond_opt_value *newval)
1040 {
1041         int ret = -EPERM;
1042         __be32 target;
1043
1044         if (newval->string) {
1045                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1046                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1047                                    &target);
1048                         return ret;
1049                 }
1050                 if (newval->string[0] == '+')
1051                         ret = bond_option_arp_ip_target_add(bond, target);
1052                 else if (newval->string[0] == '-')
1053                         ret = bond_option_arp_ip_target_rem(bond, target);
1054                 else
1055                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1056         } else {
1057                 target = newval->value;
1058                 ret = bond_option_arp_ip_target_add(bond, target);
1059         }
1060
1061         return ret;
1062 }
1063
1064 static int bond_option_arp_validate_set(struct bonding *bond,
1065                                         const struct bond_opt_value *newval)
1066 {
1067         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1068                     newval->string, newval->value);
1069
1070         if (bond->dev->flags & IFF_UP) {
1071                 if (!newval->value)
1072                         bond->recv_probe = NULL;
1073                 else if (bond->params.arp_interval)
1074                         bond->recv_probe = bond_arp_rcv;
1075         }
1076         bond->params.arp_validate = newval->value;
1077
1078         return 0;
1079 }
1080
1081 static int bond_option_arp_all_targets_set(struct bonding *bond,
1082                                            const struct bond_opt_value *newval)
1083 {
1084         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1085                     newval->string, newval->value);
1086         bond->params.arp_all_targets = newval->value;
1087
1088         return 0;
1089 }
1090
1091 static int bond_option_primary_set(struct bonding *bond,
1092                                    const struct bond_opt_value *newval)
1093 {
1094         char *p, *primary = newval->string;
1095         struct list_head *iter;
1096         struct slave *slave;
1097
1098         block_netpoll_tx();
1099
1100         p = strchr(primary, '\n');
1101         if (p)
1102                 *p = '\0';
1103         /* check to see if we are clearing primary */
1104         if (!strlen(primary)) {
1105                 netdev_info(bond->dev, "Setting primary slave to None\n");
1106                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1107                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1108                 bond_select_active_slave(bond);
1109                 goto out;
1110         }
1111
1112         bond_for_each_slave(bond, slave, iter) {
1113                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1114                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1115                                     slave->dev->name);
1116                         rcu_assign_pointer(bond->primary_slave, slave);
1117                         strcpy(bond->params.primary, slave->dev->name);
1118                         bond_select_active_slave(bond);
1119                         goto out;
1120                 }
1121         }
1122
1123         if (rtnl_dereference(bond->primary_slave)) {
1124                 netdev_info(bond->dev, "Setting primary slave to None\n");
1125                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1126                 bond_select_active_slave(bond);
1127         }
1128         strncpy(bond->params.primary, primary, IFNAMSIZ);
1129         bond->params.primary[IFNAMSIZ - 1] = 0;
1130
1131         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1132                     primary, bond->dev->name);
1133
1134 out:
1135         unblock_netpoll_tx();
1136
1137         return 0;
1138 }
1139
1140 static int bond_option_primary_reselect_set(struct bonding *bond,
1141                                             const struct bond_opt_value *newval)
1142 {
1143         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1144                     newval->string, newval->value);
1145         bond->params.primary_reselect = newval->value;
1146
1147         block_netpoll_tx();
1148         bond_select_active_slave(bond);
1149         unblock_netpoll_tx();
1150
1151         return 0;
1152 }
1153
1154 static int bond_option_fail_over_mac_set(struct bonding *bond,
1155                                          const struct bond_opt_value *newval)
1156 {
1157         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1158                     newval->string, newval->value);
1159         bond->params.fail_over_mac = newval->value;
1160
1161         return 0;
1162 }
1163
1164 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1165                                             const struct bond_opt_value *newval)
1166 {
1167         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1168                     newval->string, newval->value);
1169         bond->params.xmit_policy = newval->value;
1170
1171         return 0;
1172 }
1173
1174 static int bond_option_resend_igmp_set(struct bonding *bond,
1175                                        const struct bond_opt_value *newval)
1176 {
1177         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1178                     newval->value);
1179         bond->params.resend_igmp = newval->value;
1180
1181         return 0;
1182 }
1183
1184 static int bond_option_num_peer_notif_set(struct bonding *bond,
1185                                    const struct bond_opt_value *newval)
1186 {
1187         bond->params.num_peer_notif = newval->value;
1188
1189         return 0;
1190 }
1191
1192 static int bond_option_all_slaves_active_set(struct bonding *bond,
1193                                              const struct bond_opt_value *newval)
1194 {
1195         struct list_head *iter;
1196         struct slave *slave;
1197
1198         if (newval->value == bond->params.all_slaves_active)
1199                 return 0;
1200         bond->params.all_slaves_active = newval->value;
1201         bond_for_each_slave(bond, slave, iter) {
1202                 if (!bond_is_active_slave(slave)) {
1203                         if (newval->value)
1204                                 slave->inactive = 0;
1205                         else
1206                                 slave->inactive = 1;
1207                 }
1208         }
1209
1210         return 0;
1211 }
1212
1213 static int bond_option_min_links_set(struct bonding *bond,
1214                                      const struct bond_opt_value *newval)
1215 {
1216         netdev_info(bond->dev, "Setting min links value to %llu\n",
1217                     newval->value);
1218         bond->params.min_links = newval->value;
1219         bond_set_carrier(bond);
1220
1221         return 0;
1222 }
1223
1224 static int bond_option_lp_interval_set(struct bonding *bond,
1225                                        const struct bond_opt_value *newval)
1226 {
1227         bond->params.lp_interval = newval->value;
1228
1229         return 0;
1230 }
1231
1232 static int bond_option_pps_set(struct bonding *bond,
1233                                const struct bond_opt_value *newval)
1234 {
1235         bond->params.packets_per_slave = newval->value;
1236         if (newval->value > 0) {
1237                 bond->params.reciprocal_packets_per_slave =
1238                         reciprocal_value(newval->value);
1239         } else {
1240                 /* reciprocal_packets_per_slave is unused if
1241                  * packets_per_slave is 0 or 1, just initialize it
1242                  */
1243                 bond->params.reciprocal_packets_per_slave =
1244                         (struct reciprocal_value) { 0 };
1245         }
1246
1247         return 0;
1248 }
1249
1250 static int bond_option_lacp_rate_set(struct bonding *bond,
1251                                      const struct bond_opt_value *newval)
1252 {
1253         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1254                     newval->string, newval->value);
1255         bond->params.lacp_fast = newval->value;
1256         bond_3ad_update_lacp_rate(bond);
1257
1258         return 0;
1259 }
1260
1261 static int bond_option_ad_select_set(struct bonding *bond,
1262                                      const struct bond_opt_value *newval)
1263 {
1264         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1265                     newval->string, newval->value);
1266         bond->params.ad_select = newval->value;
1267
1268         return 0;
1269 }
1270
1271 static int bond_option_queue_id_set(struct bonding *bond,
1272                                     const struct bond_opt_value *newval)
1273 {
1274         struct slave *slave, *update_slave;
1275         struct net_device *sdev;
1276         struct list_head *iter;
1277         char *delim;
1278         int ret = 0;
1279         u16 qid;
1280
1281         /* delim will point to queue id if successful */
1282         delim = strchr(newval->string, ':');
1283         if (!delim)
1284                 goto err_no_cmd;
1285
1286         /* Terminate string that points to device name and bump it
1287          * up one, so we can read the queue id there.
1288          */
1289         *delim = '\0';
1290         if (sscanf(++delim, "%hd\n", &qid) != 1)
1291                 goto err_no_cmd;
1292
1293         /* Check buffer length, valid ifname and queue id */
1294         if (!dev_valid_name(newval->string) ||
1295             qid > bond->dev->real_num_tx_queues)
1296                 goto err_no_cmd;
1297
1298         /* Get the pointer to that interface if it exists */
1299         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1300         if (!sdev)
1301                 goto err_no_cmd;
1302
1303         /* Search for thes slave and check for duplicate qids */
1304         update_slave = NULL;
1305         bond_for_each_slave(bond, slave, iter) {
1306                 if (sdev == slave->dev)
1307                         /* We don't need to check the matching
1308                          * slave for dups, since we're overwriting it
1309                          */
1310                         update_slave = slave;
1311                 else if (qid && qid == slave->queue_id) {
1312                         goto err_no_cmd;
1313                 }
1314         }
1315
1316         if (!update_slave)
1317                 goto err_no_cmd;
1318
1319         /* Actually set the qids for the slave */
1320         update_slave->queue_id = qid;
1321
1322 out:
1323         return ret;
1324
1325 err_no_cmd:
1326         netdev_info(bond->dev, "invalid input for queue_id set\n");
1327         ret = -EPERM;
1328         goto out;
1329
1330 }
1331
1332 static int bond_option_slaves_set(struct bonding *bond,
1333                                   const struct bond_opt_value *newval)
1334 {
1335         char command[IFNAMSIZ + 1] = { 0, };
1336         struct net_device *dev;
1337         char *ifname;
1338         int ret;
1339
1340         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1341         ifname = command + 1;
1342         if ((strlen(command) <= 1) ||
1343             !dev_valid_name(ifname))
1344                 goto err_no_cmd;
1345
1346         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1347         if (!dev) {
1348                 netdev_info(bond->dev, "interface %s does not exist!\n",
1349                             ifname);
1350                 ret = -ENODEV;
1351                 goto out;
1352         }
1353
1354         switch (command[0]) {
1355         case '+':
1356                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1357                 ret = bond_enslave(bond->dev, dev);
1358                 break;
1359
1360         case '-':
1361                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1362                 ret = bond_release(bond->dev, dev);
1363                 break;
1364
1365         default:
1366                 goto err_no_cmd;
1367         }
1368
1369 out:
1370         return ret;
1371
1372 err_no_cmd:
1373         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1374         ret = -EPERM;
1375         goto out;
1376 }
1377
1378 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1379                                           const struct bond_opt_value *newval)
1380 {
1381         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1382                     newval->string, newval->value);
1383         bond->params.tlb_dynamic_lb = newval->value;
1384
1385         return 0;
1386 }
1387
1388 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1389                                              const struct bond_opt_value *newval)
1390 {
1391         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1392                     newval->value);
1393
1394         bond->params.ad_actor_sys_prio = newval->value;
1395         bond_3ad_update_ad_actor_settings(bond);
1396
1397         return 0;
1398 }
1399
1400 static int bond_option_ad_actor_system_set(struct bonding *bond,
1401                                            const struct bond_opt_value *newval)
1402 {
1403         u8 macaddr[ETH_ALEN];
1404         u8 *mac;
1405         int i;
1406
1407         if (newval->string) {
1408                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1409                            &macaddr[0], &macaddr[1], &macaddr[2],
1410                            &macaddr[3], &macaddr[4], &macaddr[5]);
1411                 if (i != ETH_ALEN)
1412                         goto err;
1413                 mac = macaddr;
1414         } else {
1415                 mac = (u8 *)&newval->value;
1416         }
1417
1418         if (!is_valid_ether_addr(mac))
1419                 goto err;
1420
1421         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1422         ether_addr_copy(bond->params.ad_actor_system, mac);
1423         bond_3ad_update_ad_actor_settings(bond);
1424
1425         return 0;
1426
1427 err:
1428         netdev_err(bond->dev, "Invalid MAC address.\n");
1429         return -EINVAL;
1430 }
1431
1432 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1433                                             const struct bond_opt_value *newval)
1434 {
1435         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1436                     newval->value);
1437
1438         bond->params.ad_user_port_key = newval->value;
1439         return 0;
1440 }