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                 .values = bond_ad_actor_sys_prio_tbl,
 406                 .set = bond_option_ad_actor_sys_prio_set,
 407         },
 408         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 409                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 410                 .name = "ad_actor_system",
 411                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 412                 .flags = BOND_OPTFLAG_RAWVAL,
 413                 .set = bond_option_ad_actor_system_set,
 414         },
 415         [BOND_OPT_AD_USER_PORT_KEY] = {
 416                 .id = BOND_OPT_AD_USER_PORT_KEY,
 417                 .name = "ad_user_port_key",
 418                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 419                 .flags = BOND_OPTFLAG_IFDOWN,
 420                 .values = bond_ad_user_port_key_tbl,
 421                 .set = bond_option_ad_user_port_key_set,
 422         },
 423         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 424                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 425                 .name = "num_grat_arp",
 426                 .desc = "Number of peer notifications to send on failover event",
 427                 .values = bond_num_peer_notif_tbl,
 428                 .set = bond_option_num_peer_notif_set
 429         }
 430 };
 431
 432 /* Searches for an option by name */
 433 const struct bond_option *bond_opt_get_by_name(const char *name)
 434 {
 435         const struct bond_option *opt;
 436         int option;
 437
 438         for (option = 0; option < BOND_OPT_LAST; option++) {
 439                 opt = bond_opt_get(option);
 440                 if (opt && !strcmp(opt->name, name))
 441                         return opt;
 442         }
 443
 444         return NULL;
 445 }
 446
 447 /* Searches for a value in opt's values[] table */
 448 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 449 {
 450         const struct bond_option *opt;
 451         int i;
 452
 453         opt = bond_opt_get(option);
 454         if (WARN_ON(!opt))
 455                 return NULL;
 456         for (i = 0; opt->values && opt->values[i].string; i++)
 457                 if (opt->values[i].value == val)
 458                         return &opt->values[i];
 459
 460         return NULL;
 461 }
 462
 463 /* Searches for a value in opt's values[] table which matches the flagmask */
 464 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 465                                                  u32 flagmask)
 466 {
 467         int i;
 468
 469         for (i = 0; opt->values && opt->values[i].string; i++)
 470                 if (opt->values[i].flags & flagmask)
 471                         return &opt->values[i];
 472
 473         return NULL;
 474 }
 475
 476 /* If maxval is missing then there's no range to check. In case minval is
 477  * missing then it's considered to be 0.
 478  */
 479 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 480 {
 481         const struct bond_opt_value *minval, *maxval;
 482
 483         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 484         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 485         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 486                 return false;
 487
 488         return true;
 489 }
 490
 491 /**
 492  * bond_opt_parse - parse option value
 493  * @opt: the option to parse against
 494  * @val: value to parse
 495  *
 496  * This function tries to extract the value from @val and check if it's
 497  * a possible match for the option and returns NULL if a match isn't found,
 498  * or the struct_opt_value that matched. It also strips the new line from
 499  * @val->string if it's present.
 500  */
 501 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 502                                             struct bond_opt_value *val)
 503 {
 504         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 505         const struct bond_opt_value *tbl;
 506         const struct bond_opt_value *ret = NULL;
 507         bool checkval;
 508         int i, rv;
 509
 510         /* No parsing if the option wants a raw val */
 511         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 512                 return val;
 513
 514         tbl = opt->values;
 515         if (!tbl)
 516                 goto out;
 517
 518         /* ULLONG_MAX is used to bypass string processing */
 519         checkval = val->value != ULLONG_MAX;
 520         if (!checkval) {
 521                 if (!val->string)
 522                         goto out;
 523                 p = strchr(val->string, '\n');
 524                 if (p)
 525                         *p = '\0';
 526                 for (p = val->string; *p; p++)
 527                         if (!(isdigit(*p) || isspace(*p)))
 528                                 break;
 529                 /* The following code extracts the string to match or the value
 530                  * and sets checkval appropriately
 531                  */
 532                 if (*p) {
 533                         rv = sscanf(val->string, "%32s", valstr);
 534                 } else {
 535                         rv = sscanf(val->string, "%llu", &val->value);
 536                         checkval = true;
 537                 }
 538                 if (!rv)
 539                         goto out;
 540         }
 541
 542         for (i = 0; tbl[i].string; i++) {
 543                 /* Check for exact match */
 544                 if (checkval) {
 545                         if (val->value == tbl[i].value)
 546                                 ret = &tbl[i];
 547                 } else {
 548                         if (!strcmp(valstr, "default") &&
 549                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 550                                 ret = &tbl[i];
 551
 552                         if (!strcmp(valstr, tbl[i].string))
 553                                 ret = &tbl[i];
 554                 }
 555                 /* Found an exact match */
 556                 if (ret)
 557                         goto out;
 558         }
 559         /* Possible range match */
 560         if (checkval && bond_opt_check_range(opt, val->value))
 561                 ret = val;
 562 out:
 563         return ret;
 564 }
 565
 566 /* Check opt's dependencies against bond mode and currently set options */
 567 static int bond_opt_check_deps(struct bonding *bond,
 568                                const struct bond_option *opt)
 569 {
 570         struct bond_params *params = &bond->params;
 571
 572         if (test_bit(params->mode, &opt->unsuppmodes))
 573                 return -EACCES;
 574         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 575                 return -ENOTEMPTY;
 576         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 577                 return -EBUSY;
 578
 579         return 0;
 580 }
 581
 582 static void bond_opt_dep_print(struct bonding *bond,
 583                                const struct bond_option *opt)
 584 {
 585         const struct bond_opt_value *modeval;
 586         struct bond_params *params;
 587
 588         params = &bond->params;
 589         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 590         if (test_bit(params->mode, &opt->unsuppmodes))
 591                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 592                            opt->name, modeval->string, modeval->value);
 593 }
 594
 595 static void bond_opt_error_interpret(struct bonding *bond,
 596                                      const struct bond_option *opt,
 597                                      int error, const struct bond_opt_value *val)
 598 {
 599         const struct bond_opt_value *minval, *maxval;
 600         char *p;
 601
 602         switch (error) {
 603         case -EINVAL:
 604                 if (val) {
 605                         if (val->string) {
 606                                 /* sometimes RAWVAL opts may have new lines */
 607                                 p = strchr(val->string, '\n');
 608                                 if (p)
 609                                         *p = '\0';
 610                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 611                                            opt->name, val->string);
 612                         } else {
 613                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 614                                            opt->name, val->value);
 615                         }
 616                 }
 617                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 618                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 619                 if (!maxval)
 620                         break;
 621                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 622                            opt->name, minval ? minval->value : 0, maxval->value);
 623                 break;
 624         case -EACCES:
 625                 bond_opt_dep_print(bond, opt);
 626                 break;
 627         case -ENOTEMPTY:
 628                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 629                            opt->name);
 630                 break;
 631         case -EBUSY:
 632                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 633                            opt->name);
 634                 break;
 635         default:
 636                 break;
 637         }
 638 }
 639
 640 /**
 641  * __bond_opt_set - set a bonding option
 642  * @bond: target bond device
 643  * @option: option to set
 644  * @val: value to set it to
 645  *
 646  * This function is used to change the bond's option value, it can be
 647  * used for both enabling/changing an option and for disabling it. RTNL lock
 648  * must be obtained before calling this function.
 649  */
 650 int __bond_opt_set(struct bonding *bond,
 651                    unsigned int option, struct bond_opt_value *val)
 652 {
 653         const struct bond_opt_value *retval = NULL;
 654         const struct bond_option *opt;
 655         int ret = -ENOENT;
 656
 657         ASSERT_RTNL();
 658
 659         opt = bond_opt_get(option);
 660         if (WARN_ON(!val) || WARN_ON(!opt))
 661                 goto out;
 662         ret = bond_opt_check_deps(bond, opt);
 663         if (ret)
 664                 goto out;
 665         retval = bond_opt_parse(opt, val);
 666         if (!retval) {
 667                 ret = -EINVAL;
 668                 goto out;
 669         }
 670         ret = opt->set(bond, retval);
 671 out:
 672         if (ret)
 673                 bond_opt_error_interpret(bond, opt, ret, val);
 674         else if (bond->dev->reg_state == NETREG_REGISTERED)
 675                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 676
 677         return ret;
 678 }
 679
 680 /**
 681  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 682  * @bond: target bond device
 683  * @option: option to set
 684  * @buf: value to set it to
 685  *
 686  * This function tries to acquire RTNL without blocking and if successful
 687  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 688  */
 689 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 690 {
 691         struct bond_opt_value optval;
 692         int ret;
 693
 694         if (!rtnl_trylock())
 695                 return restart_syscall();
 696         bond_opt_initstr(&optval, buf);
 697         ret = __bond_opt_set(bond, option, &optval);
 698         rtnl_unlock();
 699
 700         return ret;
 701 }
 702
 703 /**
 704  * bond_opt_get - get a pointer to an option
 705  * @option: option for which to return a pointer
 706  *
 707  * This function checks if option is valid and if so returns a pointer
 708  * to its entry in the bond_opts[] option array.
 709  */
 710 const struct bond_option *bond_opt_get(unsigned int option)
 711 {
 712         if (!BOND_OPT_VALID(option))
 713                 return NULL;
 714
 715         return &bond_opts[option];
 716 }
 717
 718 static int bond_option_mode_set(struct bonding *bond,
 719                                 const struct bond_opt_value *newval)
 720 {
 721         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 722                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 723                             newval->string);
 724                 /* disable arp monitoring */
 725                 bond->params.arp_interval = 0;
 726                 /* set miimon to default value */
 727                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 728                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 729                             bond->params.miimon);
 730         }
 731
 732         /* don't cache arp_validate between modes */
 733         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 734         bond->params.mode = newval->value;
 735
 736         return 0;
 737 }
 738
 739 static int bond_option_active_slave_set(struct bonding *bond,
 740                                         const struct bond_opt_value *newval)
 741 {
 742         char ifname[IFNAMSIZ] = { 0, };
 743         struct net_device *slave_dev;
 744         int ret = 0;
 745
 746         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 747         if (!strlen(ifname) || newval->string[0] == '\n') {
 748                 slave_dev = NULL;
 749         } else {
 750                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 751                 if (!slave_dev)
 752                         return -ENODEV;
 753         }
 754
 755         if (slave_dev) {
 756                 if (!netif_is_bond_slave(slave_dev)) {
 757                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 758                                    slave_dev->name);
 759                         return -EINVAL;
 760                 }
 761
 762                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 763                         netdev_err(bond->dev, "Device %s is not our slave\n",
 764                                    slave_dev->name);
 765                         return -EINVAL;
 766                 }
 767         }
 768
 769         block_netpoll_tx();
 770         /* check to see if we are clearing active */
 771         if (!slave_dev) {
 772                 netdev_info(bond->dev, "Clearing current active slave\n");
 773                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 774                 bond_select_active_slave(bond);
 775         } else {
 776                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 777                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 778
 779                 BUG_ON(!new_active);
 780
 781                 if (new_active == old_active) {
 782                         /* do nothing */
 783                         netdev_info(bond->dev, "%s is already the current active slave\n",
 784                                     new_active->dev->name);
 785                 } else {
 786                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 787                             bond_slave_is_up(new_active)) {
 788                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 789                                             new_active->dev->name);
 790                                 bond_change_active_slave(bond, new_active);
 791                         } else {
 792                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 793                                            new_active->dev->name,
 794                                            new_active->dev->name);
 795                                 ret = -EINVAL;
 796                         }
 797                 }
 798         }
 799         unblock_netpoll_tx();
 800
 801         return ret;
 802 }
 803
 804 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 805  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 806  * start it.
 807  */
 808 static int bond_option_miimon_set(struct bonding *bond,
 809                                   const struct bond_opt_value *newval)
 810 {
 811         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 812                     newval->value);
 813         bond->params.miimon = newval->value;
 814         if (bond->params.updelay)
 815                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 816                         bond->params.updelay * bond->params.miimon);
 817         if (bond->params.downdelay)
 818                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 819                             bond->params.downdelay * bond->params.miimon);
 820         if (newval->value && bond->params.arp_interval) {
 821                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 822                 bond->params.arp_interval = 0;
 823                 if (bond->params.arp_validate)
 824                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 825         }
 826         if (bond->dev->flags & IFF_UP) {
 827                 /* If the interface is up, we may need to fire off
 828                  * the MII timer. If the interface is down, the
 829                  * timer will get fired off when the open function
 830                  * is called.
 831                  */
 832                 if (!newval->value) {
 833                         cancel_delayed_work_sync(&bond->mii_work);
 834                 } else {
 835                         cancel_delayed_work_sync(&bond->arp_work);
 836                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 837                 }
 838         }
 839
 840         return 0;
 841 }
 842
 843 /* Set up and down delays. These must be multiples of the
 844  * MII monitoring value, and are stored internally as the multiplier.
 845  * Thus, we must translate to MS for the real world.
 846  */
 847 static int bond_option_updelay_set(struct bonding *bond,
 848                                    const struct bond_opt_value *newval)
 849 {
 850         int value = newval->value;
 851
 852         if (!bond->params.miimon) {
 853                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 854                 return -EPERM;
 855         }
 856         if ((value % bond->params.miimon) != 0) {
 857                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 858                             value, bond->params.miimon,
 859                             (value / bond->params.miimon) *
 860                             bond->params.miimon);
 861         }
 862         bond->params.updelay = value / bond->params.miimon;
 863         netdev_info(bond->dev, "Setting up delay to %d\n",
 864                     bond->params.updelay * bond->params.miimon);
 865
 866         return 0;
 867 }
 868
 869 static int bond_option_downdelay_set(struct bonding *bond,
 870                                      const struct bond_opt_value *newval)
 871 {
 872         int value = newval->value;
 873
 874         if (!bond->params.miimon) {
 875                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 876                 return -EPERM;
 877         }
 878         if ((value % bond->params.miimon) != 0) {
 879                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 880                             value, bond->params.miimon,
 881                             (value / bond->params.miimon) *
 882                             bond->params.miimon);
 883         }
 884         bond->params.downdelay = value / bond->params.miimon;
 885         netdev_info(bond->dev, "Setting down delay to %d\n",
 886                     bond->params.downdelay * bond->params.miimon);
 887
 888         return 0;
 889 }
 890
 891 static int bond_option_use_carrier_set(struct bonding *bond,
 892                                        const struct bond_opt_value *newval)
 893 {
 894         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 895                     newval->value);
 896         bond->params.use_carrier = newval->value;
 897
 898         return 0;
 899 }
 900
 901 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 902  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 903  * we must start it.
 904  */
 905 static int bond_option_arp_interval_set(struct bonding *bond,
 906                                         const struct bond_opt_value *newval)
 907 {
 908         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 909                     newval->value);
 910         bond->params.arp_interval = newval->value;
 911         if (newval->value) {
 912                 if (bond->params.miimon) {
 913                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 914                         bond->params.miimon = 0;
 915                 }
 916                 if (!bond->params.arp_targets[0])
 917                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 918         }
 919         if (bond->dev->flags & IFF_UP) {
 920                 /* If the interface is up, we may need to fire off
 921                  * the ARP timer.  If the interface is down, the
 922                  * timer will get fired off when the open function
 923                  * is called.
 924                  */
 925                 if (!newval->value) {
 926                         if (bond->params.arp_validate)
 927                                 bond->recv_probe = NULL;
 928                         cancel_delayed_work_sync(&bond->arp_work);
 929                 } else {
 930                         /* arp_validate can be set only in active-backup mode */
 931                         bond->recv_probe = bond_arp_rcv;
 932                         cancel_delayed_work_sync(&bond->mii_work);
 933                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 934                 }
 935         }
 936
 937         return 0;
 938 }
 939
 940 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 941                                             __be32 target,
 942                                             unsigned long last_rx)
 943 {
 944         __be32 *targets = bond->params.arp_targets;
 945         struct list_head *iter;
 946         struct slave *slave;
 947
 948         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 949                 bond_for_each_slave(bond, slave, iter)
 950                         slave->target_last_arp_rx[slot] = last_rx;
 951                 targets[slot] = target;
 952         }
 953 }
 954
 955 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 956 {
 957         __be32 *targets = bond->params.arp_targets;
 958         int ind;
 959
 960         if (!bond_is_ip_target_ok(target)) {
 961                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 962                            &target);
 963                 return -EINVAL;
 964         }
 965
 966         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 967                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 968                            &target);
 969                 return -EINVAL;
 970         }
 971
 972         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 973         if (ind == -1) {
 974                 netdev_err(bond->dev, "ARP target table is full!\n");
 975                 return -EINVAL;
 976         }
 977
 978         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 979
 980         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 981
 982         return 0;
 983 }
 984
 985 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 986 {
 987         return _bond_option_arp_ip_target_add(bond, target);
 988 }
 989
 990 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 991 {
 992         __be32 *targets = bond->params.arp_targets;
 993         struct list_head *iter;
 994         struct slave *slave;
 995         unsigned long *targets_rx;
 996         int ind, i;
 997
 998         if (!bond_is_ip_target_ok(target)) {
 999                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1000                            &target);
1001                 return -EINVAL;
1002         }
1003
1004         ind = bond_get_targets_ip(targets, target);
1005         if (ind == -1) {
1006                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1007                            &target);
1008                 return -EINVAL;
1009         }
1010
1011         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1012                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1013
1014         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1015
1016         bond_for_each_slave(bond, slave, iter) {
1017                 targets_rx = slave->target_last_arp_rx;
1018                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1019                         targets_rx[i] = targets_rx[i+1];
1020                 targets_rx[i] = 0;
1021         }
1022         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1023                 targets[i] = targets[i+1];
1024         targets[i] = 0;
1025
1026         return 0;
1027 }
1028
1029 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1030 {
1031         int i;
1032
1033         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1034                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1035 }
1036
1037 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1038                                           const struct bond_opt_value *newval)
1039 {
1040         int ret = -EPERM;
1041         __be32 target;
1042
1043         if (newval->string) {
1044                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1045                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1046                                    &target);
1047                         return ret;
1048                 }
1049                 if (newval->string[0] == '+')
1050                         ret = bond_option_arp_ip_target_add(bond, target);
1051                 else if (newval->string[0] == '-')
1052                         ret = bond_option_arp_ip_target_rem(bond, target);
1053                 else
1054                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1055         } else {
1056                 target = newval->value;
1057                 ret = bond_option_arp_ip_target_add(bond, target);
1058         }
1059
1060         return ret;
1061 }
1062
1063 static int bond_option_arp_validate_set(struct bonding *bond,
1064                                         const struct bond_opt_value *newval)
1065 {
1066         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1067                     newval->string, newval->value);
1068
1069         if (bond->dev->flags & IFF_UP) {
1070                 if (!newval->value)
1071                         bond->recv_probe = NULL;
1072                 else if (bond->params.arp_interval)
1073                         bond->recv_probe = bond_arp_rcv;
1074         }
1075         bond->params.arp_validate = newval->value;
1076
1077         return 0;
1078 }
1079
1080 static int bond_option_arp_all_targets_set(struct bonding *bond,
1081                                            const struct bond_opt_value *newval)
1082 {
1083         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1084                     newval->string, newval->value);
1085         bond->params.arp_all_targets = newval->value;
1086
1087         return 0;
1088 }
1089
1090 static int bond_option_primary_set(struct bonding *bond,
1091                                    const struct bond_opt_value *newval)
1092 {
1093         char *p, *primary = newval->string;
1094         struct list_head *iter;
1095         struct slave *slave;
1096
1097         block_netpoll_tx();
1098
1099         p = strchr(primary, '\n');
1100         if (p)
1101                 *p = '\0';
1102         /* check to see if we are clearing primary */
1103         if (!strlen(primary)) {
1104                 netdev_info(bond->dev, "Setting primary slave to None\n");
1105                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1106                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1107                 bond_select_active_slave(bond);
1108                 goto out;
1109         }
1110
1111         bond_for_each_slave(bond, slave, iter) {
1112                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1113                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1114                                     slave->dev->name);
1115                         rcu_assign_pointer(bond->primary_slave, slave);
1116                         strcpy(bond->params.primary, slave->dev->name);
1117                         bond_select_active_slave(bond);
1118                         goto out;
1119                 }
1120         }
1121
1122         if (rtnl_dereference(bond->primary_slave)) {
1123                 netdev_info(bond->dev, "Setting primary slave to None\n");
1124                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1125                 bond_select_active_slave(bond);
1126         }
1127         strncpy(bond->params.primary, primary, IFNAMSIZ);
1128         bond->params.primary[IFNAMSIZ - 1] = 0;
1129
1130         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1131                     primary, bond->dev->name);
1132
1133 out:
1134         unblock_netpoll_tx();
1135
1136         return 0;
1137 }
1138
1139 static int bond_option_primary_reselect_set(struct bonding *bond,
1140                                             const struct bond_opt_value *newval)
1141 {
1142         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1143                     newval->string, newval->value);
1144         bond->params.primary_reselect = newval->value;
1145
1146         block_netpoll_tx();
1147         bond_select_active_slave(bond);
1148         unblock_netpoll_tx();
1149
1150         return 0;
1151 }
1152
1153 static int bond_option_fail_over_mac_set(struct bonding *bond,
1154                                          const struct bond_opt_value *newval)
1155 {
1156         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1157                     newval->string, newval->value);
1158         bond->params.fail_over_mac = newval->value;
1159
1160         return 0;
1161 }
1162
1163 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1164                                             const struct bond_opt_value *newval)
1165 {
1166         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1167                     newval->string, newval->value);
1168         bond->params.xmit_policy = newval->value;
1169
1170         return 0;
1171 }
1172
1173 static int bond_option_resend_igmp_set(struct bonding *bond,
1174                                        const struct bond_opt_value *newval)
1175 {
1176         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1177                     newval->value);
1178         bond->params.resend_igmp = newval->value;
1179
1180         return 0;
1181 }
1182
1183 static int bond_option_num_peer_notif_set(struct bonding *bond,
1184                                    const struct bond_opt_value *newval)
1185 {
1186         bond->params.num_peer_notif = newval->value;
1187
1188         return 0;
1189 }
1190
1191 static int bond_option_all_slaves_active_set(struct bonding *bond,
1192                                              const struct bond_opt_value *newval)
1193 {
1194         struct list_head *iter;
1195         struct slave *slave;
1196
1197         if (newval->value == bond->params.all_slaves_active)
1198                 return 0;
1199         bond->params.all_slaves_active = newval->value;
1200         bond_for_each_slave(bond, slave, iter) {
1201                 if (!bond_is_active_slave(slave)) {
1202                         if (newval->value)
1203                                 slave->inactive = 0;
1204                         else
1205                                 slave->inactive = 1;
1206                 }
1207         }
1208
1209         return 0;
1210 }
1211
1212 static int bond_option_min_links_set(struct bonding *bond,
1213                                      const struct bond_opt_value *newval)
1214 {
1215         netdev_info(bond->dev, "Setting min links value to %llu\n",
1216                     newval->value);
1217         bond->params.min_links = newval->value;
1218         bond_set_carrier(bond);
1219
1220         return 0;
1221 }
1222
1223 static int bond_option_lp_interval_set(struct bonding *bond,
1224                                        const struct bond_opt_value *newval)
1225 {
1226         bond->params.lp_interval = newval->value;
1227
1228         return 0;
1229 }
1230
1231 static int bond_option_pps_set(struct bonding *bond,
1232                                const struct bond_opt_value *newval)
1233 {
1234         bond->params.packets_per_slave = newval->value;
1235         if (newval->value > 0) {
1236                 bond->params.reciprocal_packets_per_slave =
1237                         reciprocal_value(newval->value);
1238         } else {
1239                 /* reciprocal_packets_per_slave is unused if
1240                  * packets_per_slave is 0 or 1, just initialize it
1241                  */
1242                 bond->params.reciprocal_packets_per_slave =
1243                         (struct reciprocal_value) { 0 };
1244         }
1245
1246         return 0;
1247 }
1248
1249 static int bond_option_lacp_rate_set(struct bonding *bond,
1250                                      const struct bond_opt_value *newval)
1251 {
1252         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1253                     newval->string, newval->value);
1254         bond->params.lacp_fast = newval->value;
1255         bond_3ad_update_lacp_rate(bond);
1256
1257         return 0;
1258 }
1259
1260 static int bond_option_ad_select_set(struct bonding *bond,
1261                                      const struct bond_opt_value *newval)
1262 {
1263         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1264                     newval->string, newval->value);
1265         bond->params.ad_select = newval->value;
1266
1267         return 0;
1268 }
1269
1270 static int bond_option_queue_id_set(struct bonding *bond,
1271                                     const struct bond_opt_value *newval)
1272 {
1273         struct slave *slave, *update_slave;
1274         struct net_device *sdev;
1275         struct list_head *iter;
1276         char *delim;
1277         int ret = 0;
1278         u16 qid;
1279
1280         /* delim will point to queue id if successful */
1281         delim = strchr(newval->string, ':');
1282         if (!delim)
1283                 goto err_no_cmd;
1284
1285         /* Terminate string that points to device name and bump it
1286          * up one, so we can read the queue id there.
1287          */
1288         *delim = '\0';
1289         if (sscanf(++delim, "%hd\n", &qid) != 1)
1290                 goto err_no_cmd;
1291
1292         /* Check buffer length, valid ifname and queue id */
1293         if (!dev_valid_name(newval->string) ||
1294             qid > bond->dev->real_num_tx_queues)
1295                 goto err_no_cmd;
1296
1297         /* Get the pointer to that interface if it exists */
1298         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1299         if (!sdev)
1300                 goto err_no_cmd;
1301
1302         /* Search for thes slave and check for duplicate qids */
1303         update_slave = NULL;
1304         bond_for_each_slave(bond, slave, iter) {
1305                 if (sdev == slave->dev)
1306                         /* We don't need to check the matching
1307                          * slave for dups, since we're overwriting it
1308                          */
1309                         update_slave = slave;
1310                 else if (qid && qid == slave->queue_id) {
1311                         goto err_no_cmd;
1312                 }
1313         }
1314
1315         if (!update_slave)
1316                 goto err_no_cmd;
1317
1318         /* Actually set the qids for the slave */
1319         update_slave->queue_id = qid;
1320
1321 out:
1322         return ret;
1323
1324 err_no_cmd:
1325         netdev_info(bond->dev, "invalid input for queue_id set\n");
1326         ret = -EPERM;
1327         goto out;
1328
1329 }
1330
1331 static int bond_option_slaves_set(struct bonding *bond,
1332                                   const struct bond_opt_value *newval)
1333 {
1334         char command[IFNAMSIZ + 1] = { 0, };
1335         struct net_device *dev;
1336         char *ifname;
1337         int ret;
1338
1339         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1340         ifname = command + 1;
1341         if ((strlen(command) <= 1) ||
1342             !dev_valid_name(ifname))
1343                 goto err_no_cmd;
1344
1345         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1346         if (!dev) {
1347                 netdev_info(bond->dev, "interface %s does not exist!\n",
1348                             ifname);
1349                 ret = -ENODEV;
1350                 goto out;
1351         }
1352
1353         switch (command[0]) {
1354         case '+':
1355                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1356                 ret = bond_enslave(bond->dev, dev);
1357                 break;
1358
1359         case '-':
1360                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1361                 ret = bond_release(bond->dev, dev);
1362                 break;
1363
1364         default:
1365                 goto err_no_cmd;
1366         }
1367
1368 out:
1369         return ret;
1370
1371 err_no_cmd:
1372         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1373         ret = -EPERM;
1374         goto out;
1375 }
1376
1377 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1378                                           const struct bond_opt_value *newval)
1379 {
1380         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1381                     newval->string, newval->value);
1382         bond->params.tlb_dynamic_lb = newval->value;
1383
1384         return 0;
1385 }
1386
1387 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1388                                              const struct bond_opt_value *newval)
1389 {
1390         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1391                     newval->value);
1392
1393         bond->params.ad_actor_sys_prio = newval->value;
1394         bond_3ad_update_ad_actor_settings(bond);
1395
1396         return 0;
1397 }
1398
1399 static int bond_option_ad_actor_system_set(struct bonding *bond,
1400                                            const struct bond_opt_value *newval)
1401 {
1402         u8 macaddr[ETH_ALEN];
1403         u8 *mac;
1404         int i;
1405
1406         if (newval->string) {
1407                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1408                            &macaddr[0], &macaddr[1], &macaddr[2],
1409                            &macaddr[3], &macaddr[4], &macaddr[5]);
1410                 if (i != ETH_ALEN)
1411                         goto err;
1412                 mac = macaddr;
1413         } else {
1414                 mac = (u8 *)&newval->value;
1415         }
1416
1417         if (!is_valid_ether_addr(mac))
1418                 goto err;
1419
1420         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1421         ether_addr_copy(bond->params.ad_actor_system, mac);
1422         bond_3ad_update_ad_actor_settings(bond);
1423
1424         return 0;
1425
1426 err:
1427         netdev_err(bond->dev, "Invalid MAC address.\n");
1428         return -EINVAL;
1429 }
1430
1431 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1432                                             const struct bond_opt_value *newval)
1433 {
1434         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1435                     newval->value);
1436
1437         bond->params.ad_user_port_key = newval->value;
1438         return 0;
1439 }