drivers/net/bonding/bond_options.c

   1 /*
   2  * drivers/net/bond/bond_options.c - bonding options
   3  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   4  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/errno.h>
  13 #include <linux/if.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/ctype.h>
  18 #include <linux/inet.h>
  19 #include <net/bonding.h>
  20
  21 static int bond_option_active_slave_set(struct bonding *bond,
  22                                         const struct bond_opt_value *newval);
  23 static int bond_option_miimon_set(struct bonding *bond,
  24                                   const struct bond_opt_value *newval);
  25 static int bond_option_updelay_set(struct bonding *bond,
  26                                    const struct bond_opt_value *newval);
  27 static int bond_option_downdelay_set(struct bonding *bond,
  28                                      const struct bond_opt_value *newval);
  29 static int bond_option_use_carrier_set(struct bonding *bond,
  30                                        const struct bond_opt_value *newval);
  31 static int bond_option_arp_interval_set(struct bonding *bond,
  32                                         const struct bond_opt_value *newval);
  33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
  36                                           const struct bond_opt_value *newval);
  37 static int bond_option_arp_validate_set(struct bonding *bond,
  38                                         const struct bond_opt_value *newval);
  39 static int bond_option_arp_all_targets_set(struct bonding *bond,
  40                                            const struct bond_opt_value *newval);
  41 static int bond_option_primary_set(struct bonding *bond,
  42                                    const struct bond_opt_value *newval);
  43 static int bond_option_primary_reselect_set(struct bonding *bond,
  44                                             const struct bond_opt_value *newval);
  45 static int bond_option_fail_over_mac_set(struct bonding *bond,
  46                                          const struct bond_opt_value *newval);
  47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  48                                             const struct bond_opt_value *newval);
  49 static int bond_option_resend_igmp_set(struct bonding *bond,
  50                                        const struct bond_opt_value *newval);
  51 static int bond_option_num_peer_notif_set(struct bonding *bond,
  52                                           const struct bond_opt_value *newval);
  53 static int bond_option_all_slaves_active_set(struct bonding *bond,
  54                                              const struct bond_opt_value *newval);
  55 static int bond_option_min_links_set(struct bonding *bond,
  56                                      const struct bond_opt_value *newval);
  57 static int bond_option_lp_interval_set(struct bonding *bond,
  58                                        const struct bond_opt_value *newval);
  59 static int bond_option_pps_set(struct bonding *bond,
  60                                const struct bond_opt_value *newval);
  61 static int bond_option_lacp_rate_set(struct bonding *bond,
  62                                      const struct bond_opt_value *newval);
  63 static int bond_option_ad_select_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_queue_id_set(struct bonding *bond,
  66                                     const struct bond_opt_value *newval);
  67 static int bond_option_mode_set(struct bonding *bond,
  68                                 const struct bond_opt_value *newval);
  69 static int bond_option_slaves_set(struct bonding *bond,
  70                                   const struct bond_opt_value *newval);
  71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  74                                              const struct bond_opt_value *newval);
  75 static int bond_option_ad_actor_system_set(struct bonding *bond,
  76                                            const struct bond_opt_value *newval);
  77 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  78                                             const struct bond_opt_value *newval);
  79
  80
  81 static const struct bond_opt_value bond_mode_tbl[] = {
  82         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  83         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  84         { "balance-xor",   BOND_MODE_XOR,          0},
  85         { "broadcast",     BOND_MODE_BROADCAST,    0},
  86         { "802.3ad",       BOND_MODE_8023AD,       0},
  87         { "balance-tlb",   BOND_MODE_TLB,          0},
  88         { "balance-alb",   BOND_MODE_ALB,          0},
  89         { NULL,            -1,                     0},
  90 };
  91
  92 static const struct bond_opt_value bond_pps_tbl[] = {
  93         { "default", 1,         BOND_VALFLAG_DEFAULT},
  94         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  95         { NULL,      -1,        0},
  96 };
  97
  98 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  99         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
 100         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
 101         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
 102         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
 103         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
 104         { NULL,       -1,                       0},
 105 };
 106
 107 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 108         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 109         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 110         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 111         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 112         { "filter",             BOND_ARP_FILTER,                0},
 113         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 114         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 115         { NULL,                 -1,                             0},
 116 };
 117
 118 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 119         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 120         { "all", BOND_ARP_TARGETS_ALL, 0},
 121         { NULL,  -1,                   0},
 122 };
 123
 124 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 125         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 126         { "active", BOND_FOM_ACTIVE, 0},
 127         { "follow", BOND_FOM_FOLLOW, 0},
 128         { NULL,     -1,              0},
 129 };
 130
 131 static const struct bond_opt_value bond_intmax_tbl[] = {
 132         { "off",     0,       BOND_VALFLAG_DEFAULT},
 133         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 134         { NULL,      -1,      0}
 135 };
 136
 137 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 138         { "slow", AD_LACP_SLOW, 0},
 139         { "fast", AD_LACP_FAST, 0},
 140         { NULL,   -1,           0},
 141 };
 142
 143 static const struct bond_opt_value bond_ad_select_tbl[] = {
 144         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 145         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 146         { "count",     BOND_AD_COUNT,     0},
 147         { NULL,        -1,                0},
 148 };
 149
 150 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 151         { "off",     0,   0},
 152         { "maxval",  255, BOND_VALFLAG_MAX},
 153         { "default", 1,   BOND_VALFLAG_DEFAULT},
 154         { NULL,      -1,  0}
 155 };
 156
 157 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 158         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 159         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 160         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 161         { NULL,      -1},
 162 };
 163
 164 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 165         { "off", 0,  0},
 166         { "on",  1,  BOND_VALFLAG_DEFAULT},
 167         { NULL,  -1, 0}
 168 };
 169
 170 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 171         { "off", 0,  BOND_VALFLAG_DEFAULT},
 172         { "on",  1,  0},
 173         { NULL,  -1, 0}
 174 };
 175
 176 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 177         { "off",     0,   0},
 178         { "maxval",  255, BOND_VALFLAG_MAX},
 179         { "default", 1,   BOND_VALFLAG_DEFAULT},
 180         { NULL,      -1,  0}
 181 };
 182
 183 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 184         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 185         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 186         { NULL,      -1,      0},
 187 };
 188
 189 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 190         { "off", 0,  0},
 191         { "on",  1,  BOND_VALFLAG_DEFAULT},
 192         { NULL,  -1, 0}
 193 };
 194
 195 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 196         { "minval",  1,     BOND_VALFLAG_MIN},
 197         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 198         { NULL,      -1,    0},
 199 };
 200
 201 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 202         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 203         { "maxval",  1023,  BOND_VALFLAG_MAX},
 204         { NULL,      -1,    0},
 205 };
 206
 207 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 208         [BOND_OPT_MODE] = {
 209                 .id = BOND_OPT_MODE,
 210                 .name = "mode",
 211                 .desc = "bond device mode",
 212                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 213                 .values = bond_mode_tbl,
 214                 .set = bond_option_mode_set
 215         },
 216         [BOND_OPT_PACKETS_PER_SLAVE] = {
 217                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 218                 .name = "packets_per_slave",
 219                 .desc = "Packets to send per slave in RR mode",
 220                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 221                 .values = bond_pps_tbl,
 222                 .set = bond_option_pps_set
 223         },
 224         [BOND_OPT_XMIT_HASH] = {
 225                 .id = BOND_OPT_XMIT_HASH,
 226                 .name = "xmit_hash_policy",
 227                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 228                 .values = bond_xmit_hashtype_tbl,
 229                 .set = bond_option_xmit_hash_policy_set
 230         },
 231         [BOND_OPT_ARP_VALIDATE] = {
 232                 .id = BOND_OPT_ARP_VALIDATE,
 233                 .name = "arp_validate",
 234                 .desc = "validate src/dst of ARP probes",
 235                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 236                                BIT(BOND_MODE_ALB),
 237                 .values = bond_arp_validate_tbl,
 238                 .set = bond_option_arp_validate_set
 239         },
 240         [BOND_OPT_ARP_ALL_TARGETS] = {
 241                 .id = BOND_OPT_ARP_ALL_TARGETS,
 242                 .name = "arp_all_targets",
 243                 .desc = "fail on any/all arp targets timeout",
 244                 .values = bond_arp_all_targets_tbl,
 245                 .set = bond_option_arp_all_targets_set
 246         },
 247         [BOND_OPT_FAIL_OVER_MAC] = {
 248                 .id = BOND_OPT_FAIL_OVER_MAC,
 249                 .name = "fail_over_mac",
 250                 .desc = "For active-backup, do not set all slaves to the same MAC",
 251                 .flags = BOND_OPTFLAG_NOSLAVES,
 252                 .values = bond_fail_over_mac_tbl,
 253                 .set = bond_option_fail_over_mac_set
 254         },
 255         [BOND_OPT_ARP_INTERVAL] = {
 256                 .id = BOND_OPT_ARP_INTERVAL,
 257                 .name = "arp_interval",
 258                 .desc = "arp interval in milliseconds",
 259                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 260                                BIT(BOND_MODE_ALB),
 261                 .values = bond_intmax_tbl,
 262                 .set = bond_option_arp_interval_set
 263         },
 264         [BOND_OPT_ARP_TARGETS] = {
 265                 .id = BOND_OPT_ARP_TARGETS,
 266                 .name = "arp_ip_target",
 267                 .desc = "arp targets in n.n.n.n form",
 268                 .flags = BOND_OPTFLAG_RAWVAL,
 269                 .set = bond_option_arp_ip_targets_set
 270         },
 271         [BOND_OPT_DOWNDELAY] = {
 272                 .id = BOND_OPT_DOWNDELAY,
 273                 .name = "downdelay",
 274                 .desc = "Delay before considering link down, in milliseconds",
 275                 .values = bond_intmax_tbl,
 276                 .set = bond_option_downdelay_set
 277         },
 278         [BOND_OPT_UPDELAY] = {
 279                 .id = BOND_OPT_UPDELAY,
 280                 .name = "updelay",
 281                 .desc = "Delay before considering link up, in milliseconds",
 282                 .values = bond_intmax_tbl,
 283                 .set = bond_option_updelay_set
 284         },
 285         [BOND_OPT_LACP_RATE] = {
 286                 .id = BOND_OPT_LACP_RATE,
 287                 .name = "lacp_rate",
 288                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 289                 .flags = BOND_OPTFLAG_IFDOWN,
 290                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 291                 .values = bond_lacp_rate_tbl,
 292                 .set = bond_option_lacp_rate_set
 293         },
 294         [BOND_OPT_MINLINKS] = {
 295                 .id = BOND_OPT_MINLINKS,
 296                 .name = "min_links",
 297                 .desc = "Minimum number of available links before turning on carrier",
 298                 .values = bond_intmax_tbl,
 299                 .set = bond_option_min_links_set
 300         },
 301         [BOND_OPT_AD_SELECT] = {
 302                 .id = BOND_OPT_AD_SELECT,
 303                 .name = "ad_select",
 304                 .desc = "803.ad aggregation selection logic",
 305                 .flags = BOND_OPTFLAG_IFDOWN,
 306                 .values = bond_ad_select_tbl,
 307                 .set = bond_option_ad_select_set
 308         },
 309         [BOND_OPT_NUM_PEER_NOTIF] = {
 310                 .id = BOND_OPT_NUM_PEER_NOTIF,
 311                 .name = "num_unsol_na",
 312                 .desc = "Number of peer notifications to send on failover event",
 313                 .values = bond_num_peer_notif_tbl,
 314                 .set = bond_option_num_peer_notif_set
 315         },
 316         [BOND_OPT_MIIMON] = {
 317                 .id = BOND_OPT_MIIMON,
 318                 .name = "miimon",
 319                 .desc = "Link check interval in milliseconds",
 320                 .values = bond_intmax_tbl,
 321                 .set = bond_option_miimon_set
 322         },
 323         [BOND_OPT_PRIMARY] = {
 324                 .id = BOND_OPT_PRIMARY,
 325                 .name = "primary",
 326                 .desc = "Primary network device to use",
 327                 .flags = BOND_OPTFLAG_RAWVAL,
 328                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 329                                                 BIT(BOND_MODE_TLB) |
 330                                                 BIT(BOND_MODE_ALB)),
 331                 .set = bond_option_primary_set
 332         },
 333         [BOND_OPT_PRIMARY_RESELECT] = {
 334                 .id = BOND_OPT_PRIMARY_RESELECT,
 335                 .name = "primary_reselect",
 336                 .desc = "Reselect primary slave once it comes up",
 337                 .values = bond_primary_reselect_tbl,
 338                 .set = bond_option_primary_reselect_set
 339         },
 340         [BOND_OPT_USE_CARRIER] = {
 341                 .id = BOND_OPT_USE_CARRIER,
 342                 .name = "use_carrier",
 343                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 344                 .values = bond_use_carrier_tbl,
 345                 .set = bond_option_use_carrier_set
 346         },
 347         [BOND_OPT_ACTIVE_SLAVE] = {
 348                 .id = BOND_OPT_ACTIVE_SLAVE,
 349                 .name = "active_slave",
 350                 .desc = "Currently active slave",
 351                 .flags = BOND_OPTFLAG_RAWVAL,
 352                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 353                                                 BIT(BOND_MODE_TLB) |
 354                                                 BIT(BOND_MODE_ALB)),
 355                 .set = bond_option_active_slave_set
 356         },
 357         [BOND_OPT_QUEUE_ID] = {
 358                 .id = BOND_OPT_QUEUE_ID,
 359                 .name = "queue_id",
 360                 .desc = "Set queue id of a slave",
 361                 .flags = BOND_OPTFLAG_RAWVAL,
 362                 .set = bond_option_queue_id_set
 363         },
 364         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 365                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 366                 .name = "all_slaves_active",
 367                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 368                 .values = bond_all_slaves_active_tbl,
 369                 .set = bond_option_all_slaves_active_set
 370         },
 371         [BOND_OPT_RESEND_IGMP] = {
 372                 .id = BOND_OPT_RESEND_IGMP,
 373                 .name = "resend_igmp",
 374                 .desc = "Number of IGMP membership reports to send on link failure",
 375                 .values = bond_resend_igmp_tbl,
 376                 .set = bond_option_resend_igmp_set
 377         },
 378         [BOND_OPT_LP_INTERVAL] = {
 379                 .id = BOND_OPT_LP_INTERVAL,
 380                 .name = "lp_interval",
 381                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 382                 .values = bond_lp_interval_tbl,
 383                 .set = bond_option_lp_interval_set
 384         },
 385         [BOND_OPT_SLAVES] = {
 386                 .id = BOND_OPT_SLAVES,
 387                 .name = "slaves",
 388                 .desc = "Slave membership management",
 389                 .flags = BOND_OPTFLAG_RAWVAL,
 390                 .set = bond_option_slaves_set
 391         },
 392         [BOND_OPT_TLB_DYNAMIC_LB] = {
 393                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 394                 .name = "tlb_dynamic_lb",
 395                 .desc = "Enable dynamic flow shuffling",
 396                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
 397                 .values = bond_tlb_dynamic_lb_tbl,
 398                 .flags = BOND_OPTFLAG_IFDOWN,
 399                 .set = bond_option_tlb_dynamic_lb_set,
 400         },
 401         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 402                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 403                 .name = "ad_actor_sys_prio",
 404                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 405                 .flags = BOND_OPTFLAG_IFDOWN,
 406                 .values = bond_ad_actor_sys_prio_tbl,
 407                 .set = bond_option_ad_actor_sys_prio_set,
 408         },
 409         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 410                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 411                 .name = "ad_actor_system",
 412                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 413                 .flags = BOND_OPTFLAG_RAWVAL | BOND_OPTFLAG_IFDOWN,
 414                 .set = bond_option_ad_actor_system_set,
 415         },
 416         [BOND_OPT_AD_USER_PORT_KEY] = {
 417                 .id = BOND_OPT_AD_USER_PORT_KEY,
 418                 .name = "ad_user_port_key",
 419                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 420                 .flags = BOND_OPTFLAG_IFDOWN,
 421                 .values = bond_ad_user_port_key_tbl,
 422                 .set = bond_option_ad_user_port_key_set,
 423         }
 424 };
 425
 426 /* Searches for an option by name */
 427 const struct bond_option *bond_opt_get_by_name(const char *name)
 428 {
 429         const struct bond_option *opt;
 430         int option;
 431
 432         for (option = 0; option < BOND_OPT_LAST; option++) {
 433                 opt = bond_opt_get(option);
 434                 if (opt && !strcmp(opt->name, name))
 435                         return opt;
 436         }
 437
 438         return NULL;
 439 }
 440
 441 /* Searches for a value in opt's values[] table */
 442 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 443 {
 444         const struct bond_option *opt;
 445         int i;
 446
 447         opt = bond_opt_get(option);
 448         if (WARN_ON(!opt))
 449                 return NULL;
 450         for (i = 0; opt->values && opt->values[i].string; i++)
 451                 if (opt->values[i].value == val)
 452                         return &opt->values[i];
 453
 454         return NULL;
 455 }
 456
 457 /* Searches for a value in opt's values[] table which matches the flagmask */
 458 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 459                                                  u32 flagmask)
 460 {
 461         int i;
 462
 463         for (i = 0; opt->values && opt->values[i].string; i++)
 464                 if (opt->values[i].flags & flagmask)
 465                         return &opt->values[i];
 466
 467         return NULL;
 468 }
 469
 470 /* If maxval is missing then there's no range to check. In case minval is
 471  * missing then it's considered to be 0.
 472  */
 473 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 474 {
 475         const struct bond_opt_value *minval, *maxval;
 476
 477         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 478         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 479         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 480                 return false;
 481
 482         return true;
 483 }
 484
 485 /**
 486  * bond_opt_parse - parse option value
 487  * @opt: the option to parse against
 488  * @val: value to parse
 489  *
 490  * This function tries to extract the value from @val and check if it's
 491  * a possible match for the option and returns NULL if a match isn't found,
 492  * or the struct_opt_value that matched. It also strips the new line from
 493  * @val->string if it's present.
 494  */
 495 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 496                                             struct bond_opt_value *val)
 497 {
 498         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 499         const struct bond_opt_value *tbl;
 500         const struct bond_opt_value *ret = NULL;
 501         bool checkval;
 502         int i, rv;
 503
 504         /* No parsing if the option wants a raw val */
 505         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 506                 return val;
 507
 508         tbl = opt->values;
 509         if (!tbl)
 510                 goto out;
 511
 512         /* ULLONG_MAX is used to bypass string processing */
 513         checkval = val->value != ULLONG_MAX;
 514         if (!checkval) {
 515                 if (!val->string)
 516                         goto out;
 517                 p = strchr(val->string, '\n');
 518                 if (p)
 519                         *p = '\0';
 520                 for (p = val->string; *p; p++)
 521                         if (!(isdigit(*p) || isspace(*p)))
 522                                 break;
 523                 /* The following code extracts the string to match or the value
 524                  * and sets checkval appropriately
 525                  */
 526                 if (*p) {
 527                         rv = sscanf(val->string, "%32s", valstr);
 528                 } else {
 529                         rv = sscanf(val->string, "%llu", &val->value);
 530                         checkval = true;
 531                 }
 532                 if (!rv)
 533                         goto out;
 534         }
 535
 536         for (i = 0; tbl[i].string; i++) {
 537                 /* Check for exact match */
 538                 if (checkval) {
 539                         if (val->value == tbl[i].value)
 540                                 ret = &tbl[i];
 541                 } else {
 542                         if (!strcmp(valstr, "default") &&
 543                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 544                                 ret = &tbl[i];
 545
 546                         if (!strcmp(valstr, tbl[i].string))
 547                                 ret = &tbl[i];
 548                 }
 549                 /* Found an exact match */
 550                 if (ret)
 551                         goto out;
 552         }
 553         /* Possible range match */
 554         if (checkval && bond_opt_check_range(opt, val->value))
 555                 ret = val;
 556 out:
 557         return ret;
 558 }
 559
 560 /* Check opt's dependencies against bond mode and currently set options */
 561 static int bond_opt_check_deps(struct bonding *bond,
 562                                const struct bond_option *opt)
 563 {
 564         struct bond_params *params = &bond->params;
 565
 566         if (test_bit(params->mode, &opt->unsuppmodes))
 567                 return -EACCES;
 568         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 569                 return -ENOTEMPTY;
 570         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 571                 return -EBUSY;
 572
 573         return 0;
 574 }
 575
 576 static void bond_opt_dep_print(struct bonding *bond,
 577                                const struct bond_option *opt)
 578 {
 579         const struct bond_opt_value *modeval;
 580         struct bond_params *params;
 581
 582         params = &bond->params;
 583         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 584         if (test_bit(params->mode, &opt->unsuppmodes))
 585                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 586                            opt->name, modeval->string, modeval->value);
 587 }
 588
 589 static void bond_opt_error_interpret(struct bonding *bond,
 590                                      const struct bond_option *opt,
 591                                      int error, const struct bond_opt_value *val)
 592 {
 593         const struct bond_opt_value *minval, *maxval;
 594         char *p;
 595
 596         switch (error) {
 597         case -EINVAL:
 598                 if (val) {
 599                         if (val->string) {
 600                                 /* sometimes RAWVAL opts may have new lines */
 601                                 p = strchr(val->string, '\n');
 602                                 if (p)
 603                                         *p = '\0';
 604                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 605                                            opt->name, val->string);
 606                         } else {
 607                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 608                                            opt->name, val->value);
 609                         }
 610                 }
 611                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 612                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 613                 if (!maxval)
 614                         break;
 615                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 616                            opt->name, minval ? minval->value : 0, maxval->value);
 617                 break;
 618         case -EACCES:
 619                 bond_opt_dep_print(bond, opt);
 620                 break;
 621         case -ENOTEMPTY:
 622                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 623                            opt->name);
 624                 break;
 625         case -EBUSY:
 626                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 627                            opt->name);
 628                 break;
 629         default:
 630                 break;
 631         }
 632 }
 633
 634 /**
 635  * __bond_opt_set - set a bonding option
 636  * @bond: target bond device
 637  * @option: option to set
 638  * @val: value to set it to
 639  *
 640  * This function is used to change the bond's option value, it can be
 641  * used for both enabling/changing an option and for disabling it. RTNL lock
 642  * must be obtained before calling this function.
 643  */
 644 int __bond_opt_set(struct bonding *bond,
 645                    unsigned int option, struct bond_opt_value *val)
 646 {
 647         const struct bond_opt_value *retval = NULL;
 648         const struct bond_option *opt;
 649         int ret = -ENOENT;
 650
 651         ASSERT_RTNL();
 652
 653         opt = bond_opt_get(option);
 654         if (WARN_ON(!val) || WARN_ON(!opt))
 655                 goto out;
 656         ret = bond_opt_check_deps(bond, opt);
 657         if (ret)
 658                 goto out;
 659         retval = bond_opt_parse(opt, val);
 660         if (!retval) {
 661                 ret = -EINVAL;
 662                 goto out;
 663         }
 664         ret = opt->set(bond, retval);
 665 out:
 666         if (ret)
 667                 bond_opt_error_interpret(bond, opt, ret, val);
 668         else if (bond->dev->reg_state == NETREG_REGISTERED)
 669                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 670
 671         return ret;
 672 }
 673
 674 /**
 675  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 676  * @bond: target bond device
 677  * @option: option to set
 678  * @buf: value to set it to
 679  *
 680  * This function tries to acquire RTNL without blocking and if successful
 681  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 682  */
 683 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 684 {
 685         struct bond_opt_value optval;
 686         int ret;
 687
 688         if (!rtnl_trylock())
 689                 return restart_syscall();
 690         bond_opt_initstr(&optval, buf);
 691         ret = __bond_opt_set(bond, option, &optval);
 692         rtnl_unlock();
 693
 694         return ret;
 695 }
 696
 697 /**
 698  * bond_opt_get - get a pointer to an option
 699  * @option: option for which to return a pointer
 700  *
 701  * This function checks if option is valid and if so returns a pointer
 702  * to its entry in the bond_opts[] option array.
 703  */
 704 const struct bond_option *bond_opt_get(unsigned int option)
 705 {
 706         if (!BOND_OPT_VALID(option))
 707                 return NULL;
 708
 709         return &bond_opts[option];
 710 }
 711
 712 static int bond_option_mode_set(struct bonding *bond,
 713                                 const struct bond_opt_value *newval)
 714 {
 715         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 716                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 717                             newval->string);
 718                 /* disable arp monitoring */
 719                 bond->params.arp_interval = 0;
 720                 /* set miimon to default value */
 721                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 722                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 723                             bond->params.miimon);
 724         }
 725
 726         /* don't cache arp_validate between modes */
 727         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 728         bond->params.mode = newval->value;
 729
 730         return 0;
 731 }
 732
 733 static int bond_option_active_slave_set(struct bonding *bond,
 734                                         const struct bond_opt_value *newval)
 735 {
 736         char ifname[IFNAMSIZ] = { 0, };
 737         struct net_device *slave_dev;
 738         int ret = 0;
 739
 740         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 741         if (!strlen(ifname) || newval->string[0] == '\n') {
 742                 slave_dev = NULL;
 743         } else {
 744                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 745                 if (!slave_dev)
 746                         return -ENODEV;
 747         }
 748
 749         if (slave_dev) {
 750                 if (!netif_is_bond_slave(slave_dev)) {
 751                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 752                                    slave_dev->name);
 753                         return -EINVAL;
 754                 }
 755
 756                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 757                         netdev_err(bond->dev, "Device %s is not our slave\n",
 758                                    slave_dev->name);
 759                         return -EINVAL;
 760                 }
 761         }
 762
 763         block_netpoll_tx();
 764         /* check to see if we are clearing active */
 765         if (!slave_dev) {
 766                 netdev_info(bond->dev, "Clearing current active slave\n");
 767                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 768                 bond_select_active_slave(bond);
 769         } else {
 770                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 771                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 772
 773                 BUG_ON(!new_active);
 774
 775                 if (new_active == old_active) {
 776                         /* do nothing */
 777                         netdev_info(bond->dev, "%s is already the current active slave\n",
 778                                     new_active->dev->name);
 779                 } else {
 780                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 781                             bond_slave_is_up(new_active)) {
 782                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 783                                             new_active->dev->name);
 784                                 bond_change_active_slave(bond, new_active);
 785                         } else {
 786                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 787                                            new_active->dev->name,
 788                                            new_active->dev->name);
 789                                 ret = -EINVAL;
 790                         }
 791                 }
 792         }
 793         unblock_netpoll_tx();
 794
 795         return ret;
 796 }
 797
 798 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 799  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 800  * start it.
 801  */
 802 static int bond_option_miimon_set(struct bonding *bond,
 803                                   const struct bond_opt_value *newval)
 804 {
 805         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 806                     newval->value);
 807         bond->params.miimon = newval->value;
 808         if (bond->params.updelay)
 809                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 810                         bond->params.updelay * bond->params.miimon);
 811         if (bond->params.downdelay)
 812                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 813                             bond->params.downdelay * bond->params.miimon);
 814         if (newval->value && bond->params.arp_interval) {
 815                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 816                 bond->params.arp_interval = 0;
 817                 if (bond->params.arp_validate)
 818                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 819         }
 820         if (bond->dev->flags & IFF_UP) {
 821                 /* If the interface is up, we may need to fire off
 822                  * the MII timer. If the interface is down, the
 823                  * timer will get fired off when the open function
 824                  * is called.
 825                  */
 826                 if (!newval->value) {
 827                         cancel_delayed_work_sync(&bond->mii_work);
 828                 } else {
 829                         cancel_delayed_work_sync(&bond->arp_work);
 830                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 831                 }
 832         }
 833
 834         return 0;
 835 }
 836
 837 /* Set up and down delays. These must be multiples of the
 838  * MII monitoring value, and are stored internally as the multiplier.
 839  * Thus, we must translate to MS for the real world.
 840  */
 841 static int bond_option_updelay_set(struct bonding *bond,
 842                                    const struct bond_opt_value *newval)
 843 {
 844         int value = newval->value;
 845
 846         if (!bond->params.miimon) {
 847                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 848                 return -EPERM;
 849         }
 850         if ((value % bond->params.miimon) != 0) {
 851                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 852                             value, bond->params.miimon,
 853                             (value / bond->params.miimon) *
 854                             bond->params.miimon);
 855         }
 856         bond->params.updelay = value / bond->params.miimon;
 857         netdev_info(bond->dev, "Setting up delay to %d\n",
 858                     bond->params.updelay * bond->params.miimon);
 859
 860         return 0;
 861 }
 862
 863 static int bond_option_downdelay_set(struct bonding *bond,
 864                                      const struct bond_opt_value *newval)
 865 {
 866         int value = newval->value;
 867
 868         if (!bond->params.miimon) {
 869                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 870                 return -EPERM;
 871         }
 872         if ((value % bond->params.miimon) != 0) {
 873                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 874                             value, bond->params.miimon,
 875                             (value / bond->params.miimon) *
 876                             bond->params.miimon);
 877         }
 878         bond->params.downdelay = value / bond->params.miimon;
 879         netdev_info(bond->dev, "Setting down delay to %d\n",
 880                     bond->params.downdelay * bond->params.miimon);
 881
 882         return 0;
 883 }
 884
 885 static int bond_option_use_carrier_set(struct bonding *bond,
 886                                        const struct bond_opt_value *newval)
 887 {
 888         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 889                     newval->value);
 890         bond->params.use_carrier = newval->value;
 891
 892         return 0;
 893 }
 894
 895 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 896  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 897  * we must start it.
 898  */
 899 static int bond_option_arp_interval_set(struct bonding *bond,
 900                                         const struct bond_opt_value *newval)
 901 {
 902         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 903                     newval->value);
 904         bond->params.arp_interval = newval->value;
 905         if (newval->value) {
 906                 if (bond->params.miimon) {
 907                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 908                         bond->params.miimon = 0;
 909                 }
 910                 if (!bond->params.arp_targets[0])
 911                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 912         }
 913         if (bond->dev->flags & IFF_UP) {
 914                 /* If the interface is up, we may need to fire off
 915                  * the ARP timer.  If the interface is down, the
 916                  * timer will get fired off when the open function
 917                  * is called.
 918                  */
 919                 if (!newval->value) {
 920                         if (bond->params.arp_validate)
 921                                 bond->recv_probe = NULL;
 922                         cancel_delayed_work_sync(&bond->arp_work);
 923                 } else {
 924                         /* arp_validate can be set only in active-backup mode */
 925                         bond->recv_probe = bond_arp_rcv;
 926                         cancel_delayed_work_sync(&bond->mii_work);
 927                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 928                 }
 929         }
 930
 931         return 0;
 932 }
 933
 934 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 935                                             __be32 target,
 936                                             unsigned long last_rx)
 937 {
 938         __be32 *targets = bond->params.arp_targets;
 939         struct list_head *iter;
 940         struct slave *slave;
 941
 942         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 943                 bond_for_each_slave(bond, slave, iter)
 944                         slave->target_last_arp_rx[slot] = last_rx;
 945                 targets[slot] = target;
 946         }
 947 }
 948
 949 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 950 {
 951         __be32 *targets = bond->params.arp_targets;
 952         int ind;
 953
 954         if (!bond_is_ip_target_ok(target)) {
 955                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 956                            &target);
 957                 return -EINVAL;
 958         }
 959
 960         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 961                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 962                            &target);
 963                 return -EINVAL;
 964         }
 965
 966         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 967         if (ind == -1) {
 968                 netdev_err(bond->dev, "ARP target table is full!\n");
 969                 return -EINVAL;
 970         }
 971
 972         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 973
 974         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 975
 976         return 0;
 977 }
 978
 979 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 980 {
 981         return _bond_option_arp_ip_target_add(bond, target);
 982 }
 983
 984 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 985 {
 986         __be32 *targets = bond->params.arp_targets;
 987         struct list_head *iter;
 988         struct slave *slave;
 989         unsigned long *targets_rx;
 990         int ind, i;
 991
 992         if (!bond_is_ip_target_ok(target)) {
 993                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
 994                            &target);
 995                 return -EINVAL;
 996         }
 997
 998         ind = bond_get_targets_ip(targets, target);
 999         if (ind == -1) {
1000                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1001                            &target);
1002                 return -EINVAL;
1003         }
1004
1005         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1006                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1007
1008         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1009
1010         bond_for_each_slave(bond, slave, iter) {
1011                 targets_rx = slave->target_last_arp_rx;
1012                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1013                         targets_rx[i] = targets_rx[i+1];
1014                 targets_rx[i] = 0;
1015         }
1016         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1017                 targets[i] = targets[i+1];
1018         targets[i] = 0;
1019
1020         return 0;
1021 }
1022
1023 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1024 {
1025         int i;
1026
1027         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1028                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1029 }
1030
1031 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1032                                           const struct bond_opt_value *newval)
1033 {
1034         int ret = -EPERM;
1035         __be32 target;
1036
1037         if (newval->string) {
1038                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1039                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1040                                    &target);
1041                         return ret;
1042                 }
1043                 if (newval->string[0] == '+')
1044                         ret = bond_option_arp_ip_target_add(bond, target);
1045                 else if (newval->string[0] == '-')
1046                         ret = bond_option_arp_ip_target_rem(bond, target);
1047                 else
1048                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1049         } else {
1050                 target = newval->value;
1051                 ret = bond_option_arp_ip_target_add(bond, target);
1052         }
1053
1054         return ret;
1055 }
1056
1057 static int bond_option_arp_validate_set(struct bonding *bond,
1058                                         const struct bond_opt_value *newval)
1059 {
1060         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1061                     newval->string, newval->value);
1062
1063         if (bond->dev->flags & IFF_UP) {
1064                 if (!newval->value)
1065                         bond->recv_probe = NULL;
1066                 else if (bond->params.arp_interval)
1067                         bond->recv_probe = bond_arp_rcv;
1068         }
1069         bond->params.arp_validate = newval->value;
1070
1071         return 0;
1072 }
1073
1074 static int bond_option_arp_all_targets_set(struct bonding *bond,
1075                                            const struct bond_opt_value *newval)
1076 {
1077         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1078                     newval->string, newval->value);
1079         bond->params.arp_all_targets = newval->value;
1080
1081         return 0;
1082 }
1083
1084 static int bond_option_primary_set(struct bonding *bond,
1085                                    const struct bond_opt_value *newval)
1086 {
1087         char *p, *primary = newval->string;
1088         struct list_head *iter;
1089         struct slave *slave;
1090
1091         block_netpoll_tx();
1092
1093         p = strchr(primary, '\n');
1094         if (p)
1095                 *p = '\0';
1096         /* check to see if we are clearing primary */
1097         if (!strlen(primary)) {
1098                 netdev_info(bond->dev, "Setting primary slave to None\n");
1099                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1100                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1101                 bond_select_active_slave(bond);
1102                 goto out;
1103         }
1104
1105         bond_for_each_slave(bond, slave, iter) {
1106                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1107                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1108                                     slave->dev->name);
1109                         rcu_assign_pointer(bond->primary_slave, slave);
1110                         strcpy(bond->params.primary, slave->dev->name);
1111                         bond_select_active_slave(bond);
1112                         goto out;
1113                 }
1114         }
1115
1116         if (rtnl_dereference(bond->primary_slave)) {
1117                 netdev_info(bond->dev, "Setting primary slave to None\n");
1118                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1119                 bond_select_active_slave(bond);
1120         }
1121         strncpy(bond->params.primary, primary, IFNAMSIZ);
1122         bond->params.primary[IFNAMSIZ - 1] = 0;
1123
1124         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1125                     primary, bond->dev->name);
1126
1127 out:
1128         unblock_netpoll_tx();
1129
1130         return 0;
1131 }
1132
1133 static int bond_option_primary_reselect_set(struct bonding *bond,
1134                                             const struct bond_opt_value *newval)
1135 {
1136         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1137                     newval->string, newval->value);
1138         bond->params.primary_reselect = newval->value;
1139
1140         block_netpoll_tx();
1141         bond_select_active_slave(bond);
1142         unblock_netpoll_tx();
1143
1144         return 0;
1145 }
1146
1147 static int bond_option_fail_over_mac_set(struct bonding *bond,
1148                                          const struct bond_opt_value *newval)
1149 {
1150         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1151                     newval->string, newval->value);
1152         bond->params.fail_over_mac = newval->value;
1153
1154         return 0;
1155 }
1156
1157 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1158                                             const struct bond_opt_value *newval)
1159 {
1160         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1161                     newval->string, newval->value);
1162         bond->params.xmit_policy = newval->value;
1163
1164         return 0;
1165 }
1166
1167 static int bond_option_resend_igmp_set(struct bonding *bond,
1168                                        const struct bond_opt_value *newval)
1169 {
1170         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1171                     newval->value);
1172         bond->params.resend_igmp = newval->value;
1173
1174         return 0;
1175 }
1176
1177 static int bond_option_num_peer_notif_set(struct bonding *bond,
1178                                    const struct bond_opt_value *newval)
1179 {
1180         bond->params.num_peer_notif = newval->value;
1181
1182         return 0;
1183 }
1184
1185 static int bond_option_all_slaves_active_set(struct bonding *bond,
1186                                              const struct bond_opt_value *newval)
1187 {
1188         struct list_head *iter;
1189         struct slave *slave;
1190
1191         if (newval->value == bond->params.all_slaves_active)
1192                 return 0;
1193         bond->params.all_slaves_active = newval->value;
1194         bond_for_each_slave(bond, slave, iter) {
1195                 if (!bond_is_active_slave(slave)) {
1196                         if (newval->value)
1197                                 slave->inactive = 0;
1198                         else
1199                                 slave->inactive = 1;
1200                 }
1201         }
1202
1203         return 0;
1204 }
1205
1206 static int bond_option_min_links_set(struct bonding *bond,
1207                                      const struct bond_opt_value *newval)
1208 {
1209         netdev_info(bond->dev, "Setting min links value to %llu\n",
1210                     newval->value);
1211         bond->params.min_links = newval->value;
1212         bond_set_carrier(bond);
1213
1214         return 0;
1215 }
1216
1217 static int bond_option_lp_interval_set(struct bonding *bond,
1218                                        const struct bond_opt_value *newval)
1219 {
1220         bond->params.lp_interval = newval->value;
1221
1222         return 0;
1223 }
1224
1225 static int bond_option_pps_set(struct bonding *bond,
1226                                const struct bond_opt_value *newval)
1227 {
1228         bond->params.packets_per_slave = newval->value;
1229         if (newval->value > 0) {
1230                 bond->params.reciprocal_packets_per_slave =
1231                         reciprocal_value(newval->value);
1232         } else {
1233                 /* reciprocal_packets_per_slave is unused if
1234                  * packets_per_slave is 0 or 1, just initialize it
1235                  */
1236                 bond->params.reciprocal_packets_per_slave =
1237                         (struct reciprocal_value) { 0 };
1238         }
1239
1240         return 0;
1241 }
1242
1243 static int bond_option_lacp_rate_set(struct bonding *bond,
1244                                      const struct bond_opt_value *newval)
1245 {
1246         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1247                     newval->string, newval->value);
1248         bond->params.lacp_fast = newval->value;
1249         bond_3ad_update_lacp_rate(bond);
1250
1251         return 0;
1252 }
1253
1254 static int bond_option_ad_select_set(struct bonding *bond,
1255                                      const struct bond_opt_value *newval)
1256 {
1257         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1258                     newval->string, newval->value);
1259         bond->params.ad_select = newval->value;
1260
1261         return 0;
1262 }
1263
1264 static int bond_option_queue_id_set(struct bonding *bond,
1265                                     const struct bond_opt_value *newval)
1266 {
1267         struct slave *slave, *update_slave;
1268         struct net_device *sdev;
1269         struct list_head *iter;
1270         char *delim;
1271         int ret = 0;
1272         u16 qid;
1273
1274         /* delim will point to queue id if successful */
1275         delim = strchr(newval->string, ':');
1276         if (!delim)
1277                 goto err_no_cmd;
1278
1279         /* Terminate string that points to device name and bump it
1280          * up one, so we can read the queue id there.
1281          */
1282         *delim = '\0';
1283         if (sscanf(++delim, "%hd\n", &qid) != 1)
1284                 goto err_no_cmd;
1285
1286         /* Check buffer length, valid ifname and queue id */
1287         if (!dev_valid_name(newval->string) ||
1288             qid > bond->dev->real_num_tx_queues)
1289                 goto err_no_cmd;
1290
1291         /* Get the pointer to that interface if it exists */
1292         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1293         if (!sdev)
1294                 goto err_no_cmd;
1295
1296         /* Search for thes slave and check for duplicate qids */
1297         update_slave = NULL;
1298         bond_for_each_slave(bond, slave, iter) {
1299                 if (sdev == slave->dev)
1300                         /* We don't need to check the matching
1301                          * slave for dups, since we're overwriting it
1302                          */
1303                         update_slave = slave;
1304                 else if (qid && qid == slave->queue_id) {
1305                         goto err_no_cmd;
1306                 }
1307         }
1308
1309         if (!update_slave)
1310                 goto err_no_cmd;
1311
1312         /* Actually set the qids for the slave */
1313         update_slave->queue_id = qid;
1314
1315 out:
1316         return ret;
1317
1318 err_no_cmd:
1319         netdev_info(bond->dev, "invalid input for queue_id set\n");
1320         ret = -EPERM;
1321         goto out;
1322
1323 }
1324
1325 static int bond_option_slaves_set(struct bonding *bond,
1326                                   const struct bond_opt_value *newval)
1327 {
1328         char command[IFNAMSIZ + 1] = { 0, };
1329         struct net_device *dev;
1330         char *ifname;
1331         int ret;
1332
1333         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1334         ifname = command + 1;
1335         if ((strlen(command) <= 1) ||
1336             !dev_valid_name(ifname))
1337                 goto err_no_cmd;
1338
1339         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1340         if (!dev) {
1341                 netdev_info(bond->dev, "interface %s does not exist!\n",
1342                             ifname);
1343                 ret = -ENODEV;
1344                 goto out;
1345         }
1346
1347         switch (command[0]) {
1348         case '+':
1349                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1350                 ret = bond_enslave(bond->dev, dev);
1351                 break;
1352
1353         case '-':
1354                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1355                 ret = bond_release(bond->dev, dev);
1356                 break;
1357
1358         default:
1359                 goto err_no_cmd;
1360         }
1361
1362 out:
1363         return ret;
1364
1365 err_no_cmd:
1366         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1367         ret = -EPERM;
1368         goto out;
1369 }
1370
1371 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1372                                           const struct bond_opt_value *newval)
1373 {
1374         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1375                     newval->string, newval->value);
1376         bond->params.tlb_dynamic_lb = newval->value;
1377
1378         return 0;
1379 }
1380
1381 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1382                                              const struct bond_opt_value *newval)
1383 {
1384         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1385                     newval->value);
1386
1387         bond->params.ad_actor_sys_prio = newval->value;
1388         return 0;
1389 }
1390
1391 static int bond_option_ad_actor_system_set(struct bonding *bond,
1392                                            const struct bond_opt_value *newval)
1393 {
1394         u8 macaddr[ETH_ALEN];
1395         u8 *mac;
1396         int i;
1397
1398         if (newval->string) {
1399                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1400                            &macaddr[0], &macaddr[1], &macaddr[2],
1401                            &macaddr[3], &macaddr[4], &macaddr[5]);
1402                 if (i != ETH_ALEN)
1403                         goto err;
1404                 mac = macaddr;
1405         } else {
1406                 mac = (u8 *)&newval->value;
1407         }
1408
1409         if (!is_valid_ether_addr(mac))
1410                 goto err;
1411
1412         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1413         ether_addr_copy(bond->params.ad_actor_system, mac);
1414         return 0;
1415
1416 err:
1417         netdev_err(bond->dev, "Invalid MAC address.\n");
1418         return -EINVAL;
1419 }
1420
1421 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1422                                             const struct bond_opt_value *newval)
1423 {
1424         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1425                     newval->value);
1426
1427         bond->params.ad_user_port_key = newval->value;
1428         return 0;
1429 }