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 <linux/sched/signal.h>
  20
  21 #include <net/bonding.h>
  22
  23 static int bond_option_active_slave_set(struct bonding *bond,
  24                                         const struct bond_opt_value *newval);
  25 static int bond_option_miimon_set(struct bonding *bond,
  26                                   const struct bond_opt_value *newval);
  27 static int bond_option_updelay_set(struct bonding *bond,
  28                                    const struct bond_opt_value *newval);
  29 static int bond_option_downdelay_set(struct bonding *bond,
  30                                      const struct bond_opt_value *newval);
  31 static int bond_option_use_carrier_set(struct bonding *bond,
  32                                        const struct bond_opt_value *newval);
  33 static int bond_option_arp_interval_set(struct bonding *bond,
  34                                         const struct bond_opt_value *newval);
  35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  37 static int bond_option_arp_ip_targets_set(struct bonding *bond,
  38                                           const struct bond_opt_value *newval);
  39 static int bond_option_arp_validate_set(struct bonding *bond,
  40                                         const struct bond_opt_value *newval);
  41 static int bond_option_arp_all_targets_set(struct bonding *bond,
  42                                            const struct bond_opt_value *newval);
  43 static int bond_option_primary_set(struct bonding *bond,
  44                                    const struct bond_opt_value *newval);
  45 static int bond_option_primary_reselect_set(struct bonding *bond,
  46                                             const struct bond_opt_value *newval);
  47 static int bond_option_fail_over_mac_set(struct bonding *bond,
  48                                          const struct bond_opt_value *newval);
  49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  50                                             const struct bond_opt_value *newval);
  51 static int bond_option_resend_igmp_set(struct bonding *bond,
  52                                        const struct bond_opt_value *newval);
  53 static int bond_option_num_peer_notif_set(struct bonding *bond,
  54                                           const struct bond_opt_value *newval);
  55 static int bond_option_all_slaves_active_set(struct bonding *bond,
  56                                              const struct bond_opt_value *newval);
  57 static int bond_option_min_links_set(struct bonding *bond,
  58                                      const struct bond_opt_value *newval);
  59 static int bond_option_lp_interval_set(struct bonding *bond,
  60                                        const struct bond_opt_value *newval);
  61 static int bond_option_pps_set(struct bonding *bond,
  62                                const struct bond_opt_value *newval);
  63 static int bond_option_lacp_rate_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_ad_select_set(struct bonding *bond,
  66                                      const struct bond_opt_value *newval);
  67 static int bond_option_queue_id_set(struct bonding *bond,
  68                                     const struct bond_opt_value *newval);
  69 static int bond_option_mode_set(struct bonding *bond,
  70                                 const struct bond_opt_value *newval);
  71 static int bond_option_slaves_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  74                                   const struct bond_opt_value *newval);
  75 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  76                                              const struct bond_opt_value *newval);
  77 static int bond_option_ad_actor_system_set(struct bonding *bond,
  78                                            const struct bond_opt_value *newval);
  79 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  80                                             const struct bond_opt_value *newval);
  81
  82
  83 static const struct bond_opt_value bond_mode_tbl[] = {
  84         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  85         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  86         { "balance-xor",   BOND_MODE_XOR,          0},
  87         { "broadcast",     BOND_MODE_BROADCAST,    0},
  88         { "802.3ad",       BOND_MODE_8023AD,       0},
  89         { "balance-tlb",   BOND_MODE_TLB,          0},
  90         { "balance-alb",   BOND_MODE_ALB,          0},
  91         { NULL,            -1,                     0},
  92 };
  93
  94 static const struct bond_opt_value bond_pps_tbl[] = {
  95         { "default", 1,         BOND_VALFLAG_DEFAULT},
  96         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  97         { NULL,      -1,        0},
  98 };
  99
 100 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
 101         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
 102         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
 103         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
 104         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
 105         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
 106         { NULL,       -1,                       0},
 107 };
 108
 109 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 110         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 111         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 112         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 113         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 114         { "filter",             BOND_ARP_FILTER,                0},
 115         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 116         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 117         { NULL,                 -1,                             0},
 118 };
 119
 120 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 121         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 122         { "all", BOND_ARP_TARGETS_ALL, 0},
 123         { NULL,  -1,                   0},
 124 };
 125
 126 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 127         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 128         { "active", BOND_FOM_ACTIVE, 0},
 129         { "follow", BOND_FOM_FOLLOW, 0},
 130         { NULL,     -1,              0},
 131 };
 132
 133 static const struct bond_opt_value bond_intmax_tbl[] = {
 134         { "off",     0,       BOND_VALFLAG_DEFAULT},
 135         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 136         { NULL,      -1,      0}
 137 };
 138
 139 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 140         { "slow", AD_LACP_SLOW, 0},
 141         { "fast", AD_LACP_FAST, 0},
 142         { NULL,   -1,           0},
 143 };
 144
 145 static const struct bond_opt_value bond_ad_select_tbl[] = {
 146         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 147         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 148         { "count",     BOND_AD_COUNT,     0},
 149         { NULL,        -1,                0},
 150 };
 151
 152 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 153         { "off",     0,   0},
 154         { "maxval",  255, BOND_VALFLAG_MAX},
 155         { "default", 1,   BOND_VALFLAG_DEFAULT},
 156         { NULL,      -1,  0}
 157 };
 158
 159 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 160         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 161         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 162         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 163         { NULL,      -1},
 164 };
 165
 166 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 167         { "off", 0,  0},
 168         { "on",  1,  BOND_VALFLAG_DEFAULT},
 169         { NULL,  -1, 0}
 170 };
 171
 172 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 173         { "off", 0,  BOND_VALFLAG_DEFAULT},
 174         { "on",  1,  0},
 175         { NULL,  -1, 0}
 176 };
 177
 178 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 179         { "off",     0,   0},
 180         { "maxval",  255, BOND_VALFLAG_MAX},
 181         { "default", 1,   BOND_VALFLAG_DEFAULT},
 182         { NULL,      -1,  0}
 183 };
 184
 185 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 186         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 187         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 188         { NULL,      -1,      0},
 189 };
 190
 191 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 192         { "off", 0,  0},
 193         { "on",  1,  BOND_VALFLAG_DEFAULT},
 194         { NULL,  -1, 0}
 195 };
 196
 197 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 198         { "minval",  1,     BOND_VALFLAG_MIN},
 199         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 200         { NULL,      -1,    0},
 201 };
 202
 203 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 204         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 205         { "maxval",  1023,  BOND_VALFLAG_MAX},
 206         { NULL,      -1,    0},
 207 };
 208
 209 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 210         [BOND_OPT_MODE] = {
 211                 .id = BOND_OPT_MODE,
 212                 .name = "mode",
 213                 .desc = "bond device mode",
 214                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 215                 .values = bond_mode_tbl,
 216                 .set = bond_option_mode_set
 217         },
 218         [BOND_OPT_PACKETS_PER_SLAVE] = {
 219                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 220                 .name = "packets_per_slave",
 221                 .desc = "Packets to send per slave in RR mode",
 222                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 223                 .values = bond_pps_tbl,
 224                 .set = bond_option_pps_set
 225         },
 226         [BOND_OPT_XMIT_HASH] = {
 227                 .id = BOND_OPT_XMIT_HASH,
 228                 .name = "xmit_hash_policy",
 229                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 230                 .values = bond_xmit_hashtype_tbl,
 231                 .set = bond_option_xmit_hash_policy_set
 232         },
 233         [BOND_OPT_ARP_VALIDATE] = {
 234                 .id = BOND_OPT_ARP_VALIDATE,
 235                 .name = "arp_validate",
 236                 .desc = "validate src/dst of ARP probes",
 237                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 238                                BIT(BOND_MODE_ALB),
 239                 .values = bond_arp_validate_tbl,
 240                 .set = bond_option_arp_validate_set
 241         },
 242         [BOND_OPT_ARP_ALL_TARGETS] = {
 243                 .id = BOND_OPT_ARP_ALL_TARGETS,
 244                 .name = "arp_all_targets",
 245                 .desc = "fail on any/all arp targets timeout",
 246                 .values = bond_arp_all_targets_tbl,
 247                 .set = bond_option_arp_all_targets_set
 248         },
 249         [BOND_OPT_FAIL_OVER_MAC] = {
 250                 .id = BOND_OPT_FAIL_OVER_MAC,
 251                 .name = "fail_over_mac",
 252                 .desc = "For active-backup, do not set all slaves to the same MAC",
 253                 .flags = BOND_OPTFLAG_NOSLAVES,
 254                 .values = bond_fail_over_mac_tbl,
 255                 .set = bond_option_fail_over_mac_set
 256         },
 257         [BOND_OPT_ARP_INTERVAL] = {
 258                 .id = BOND_OPT_ARP_INTERVAL,
 259                 .name = "arp_interval",
 260                 .desc = "arp interval in milliseconds",
 261                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 262                                BIT(BOND_MODE_ALB),
 263                 .values = bond_intmax_tbl,
 264                 .set = bond_option_arp_interval_set
 265         },
 266         [BOND_OPT_ARP_TARGETS] = {
 267                 .id = BOND_OPT_ARP_TARGETS,
 268                 .name = "arp_ip_target",
 269                 .desc = "arp targets in n.n.n.n form",
 270                 .flags = BOND_OPTFLAG_RAWVAL,
 271                 .set = bond_option_arp_ip_targets_set
 272         },
 273         [BOND_OPT_DOWNDELAY] = {
 274                 .id = BOND_OPT_DOWNDELAY,
 275                 .name = "downdelay",
 276                 .desc = "Delay before considering link down, in milliseconds",
 277                 .values = bond_intmax_tbl,
 278                 .set = bond_option_downdelay_set
 279         },
 280         [BOND_OPT_UPDELAY] = {
 281                 .id = BOND_OPT_UPDELAY,
 282                 .name = "updelay",
 283                 .desc = "Delay before considering link up, in milliseconds",
 284                 .values = bond_intmax_tbl,
 285                 .set = bond_option_updelay_set
 286         },
 287         [BOND_OPT_LACP_RATE] = {
 288                 .id = BOND_OPT_LACP_RATE,
 289                 .name = "lacp_rate",
 290                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 291                 .flags = BOND_OPTFLAG_IFDOWN,
 292                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 293                 .values = bond_lacp_rate_tbl,
 294                 .set = bond_option_lacp_rate_set
 295         },
 296         [BOND_OPT_MINLINKS] = {
 297                 .id = BOND_OPT_MINLINKS,
 298                 .name = "min_links",
 299                 .desc = "Minimum number of available links before turning on carrier",
 300                 .values = bond_intmax_tbl,
 301                 .set = bond_option_min_links_set
 302         },
 303         [BOND_OPT_AD_SELECT] = {
 304                 .id = BOND_OPT_AD_SELECT,
 305                 .name = "ad_select",
 306                 .desc = "803.ad aggregation selection logic",
 307                 .flags = BOND_OPTFLAG_IFDOWN,
 308                 .values = bond_ad_select_tbl,
 309                 .set = bond_option_ad_select_set
 310         },
 311         [BOND_OPT_NUM_PEER_NOTIF] = {
 312                 .id = BOND_OPT_NUM_PEER_NOTIF,
 313                 .name = "num_unsol_na",
 314                 .desc = "Number of peer notifications to send on failover event",
 315                 .values = bond_num_peer_notif_tbl,
 316                 .set = bond_option_num_peer_notif_set
 317         },
 318         [BOND_OPT_MIIMON] = {
 319                 .id = BOND_OPT_MIIMON,
 320                 .name = "miimon",
 321                 .desc = "Link check interval in milliseconds",
 322                 .values = bond_intmax_tbl,
 323                 .set = bond_option_miimon_set
 324         },
 325         [BOND_OPT_PRIMARY] = {
 326                 .id = BOND_OPT_PRIMARY,
 327                 .name = "primary",
 328                 .desc = "Primary network device to use",
 329                 .flags = BOND_OPTFLAG_RAWVAL,
 330                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 331                                                 BIT(BOND_MODE_TLB) |
 332                                                 BIT(BOND_MODE_ALB)),
 333                 .set = bond_option_primary_set
 334         },
 335         [BOND_OPT_PRIMARY_RESELECT] = {
 336                 .id = BOND_OPT_PRIMARY_RESELECT,
 337                 .name = "primary_reselect",
 338                 .desc = "Reselect primary slave once it comes up",
 339                 .values = bond_primary_reselect_tbl,
 340                 .set = bond_option_primary_reselect_set
 341         },
 342         [BOND_OPT_USE_CARRIER] = {
 343                 .id = BOND_OPT_USE_CARRIER,
 344                 .name = "use_carrier",
 345                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 346                 .values = bond_use_carrier_tbl,
 347                 .set = bond_option_use_carrier_set
 348         },
 349         [BOND_OPT_ACTIVE_SLAVE] = {
 350                 .id = BOND_OPT_ACTIVE_SLAVE,
 351                 .name = "active_slave",
 352                 .desc = "Currently active slave",
 353                 .flags = BOND_OPTFLAG_RAWVAL,
 354                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 355                                                 BIT(BOND_MODE_TLB) |
 356                                                 BIT(BOND_MODE_ALB)),
 357                 .set = bond_option_active_slave_set
 358         },
 359         [BOND_OPT_QUEUE_ID] = {
 360                 .id = BOND_OPT_QUEUE_ID,
 361                 .name = "queue_id",
 362                 .desc = "Set queue id of a slave",
 363                 .flags = BOND_OPTFLAG_RAWVAL,
 364                 .set = bond_option_queue_id_set
 365         },
 366         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 367                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 368                 .name = "all_slaves_active",
 369                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 370                 .values = bond_all_slaves_active_tbl,
 371                 .set = bond_option_all_slaves_active_set
 372         },
 373         [BOND_OPT_RESEND_IGMP] = {
 374                 .id = BOND_OPT_RESEND_IGMP,
 375                 .name = "resend_igmp",
 376                 .desc = "Number of IGMP membership reports to send on link failure",
 377                 .values = bond_resend_igmp_tbl,
 378                 .set = bond_option_resend_igmp_set
 379         },
 380         [BOND_OPT_LP_INTERVAL] = {
 381                 .id = BOND_OPT_LP_INTERVAL,
 382                 .name = "lp_interval",
 383                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 384                 .values = bond_lp_interval_tbl,
 385                 .set = bond_option_lp_interval_set
 386         },
 387         [BOND_OPT_SLAVES] = {
 388                 .id = BOND_OPT_SLAVES,
 389                 .name = "slaves",
 390                 .desc = "Slave membership management",
 391                 .flags = BOND_OPTFLAG_RAWVAL,
 392                 .set = bond_option_slaves_set
 393         },
 394         [BOND_OPT_TLB_DYNAMIC_LB] = {
 395                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 396                 .name = "tlb_dynamic_lb",
 397                 .desc = "Enable dynamic flow shuffling",
 398                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
 399                 .values = bond_tlb_dynamic_lb_tbl,
 400                 .flags = BOND_OPTFLAG_IFDOWN,
 401                 .set = bond_option_tlb_dynamic_lb_set,
 402         },
 403         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 404                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 405                 .name = "ad_actor_sys_prio",
 406                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 407                 .values = bond_ad_actor_sys_prio_tbl,
 408                 .set = bond_option_ad_actor_sys_prio_set,
 409         },
 410         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 411                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 412                 .name = "ad_actor_system",
 413                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 414                 .flags = BOND_OPTFLAG_RAWVAL,
 415                 .set = bond_option_ad_actor_system_set,
 416         },
 417         [BOND_OPT_AD_USER_PORT_KEY] = {
 418                 .id = BOND_OPT_AD_USER_PORT_KEY,
 419                 .name = "ad_user_port_key",
 420                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 421                 .flags = BOND_OPTFLAG_IFDOWN,
 422                 .values = bond_ad_user_port_key_tbl,
 423                 .set = bond_option_ad_user_port_key_set,
 424         },
 425         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 426                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 427                 .name = "num_grat_arp",
 428                 .desc = "Number of peer notifications to send on failover event",
 429                 .values = bond_num_peer_notif_tbl,
 430                 .set = bond_option_num_peer_notif_set
 431         }
 432 };
 433
 434 /* Searches for an option by name */
 435 const struct bond_option *bond_opt_get_by_name(const char *name)
 436 {
 437         const struct bond_option *opt;
 438         int option;
 439
 440         for (option = 0; option < BOND_OPT_LAST; option++) {
 441                 opt = bond_opt_get(option);
 442                 if (opt && !strcmp(opt->name, name))
 443                         return opt;
 444         }
 445
 446         return NULL;
 447 }
 448
 449 /* Searches for a value in opt's values[] table */
 450 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 451 {
 452         const struct bond_option *opt;
 453         int i;
 454
 455         opt = bond_opt_get(option);
 456         if (WARN_ON(!opt))
 457                 return NULL;
 458         for (i = 0; opt->values && opt->values[i].string; i++)
 459                 if (opt->values[i].value == val)
 460                         return &opt->values[i];
 461
 462         return NULL;
 463 }
 464
 465 /* Searches for a value in opt's values[] table which matches the flagmask */
 466 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 467                                                  u32 flagmask)
 468 {
 469         int i;
 470
 471         for (i = 0; opt->values && opt->values[i].string; i++)
 472                 if (opt->values[i].flags & flagmask)
 473                         return &opt->values[i];
 474
 475         return NULL;
 476 }
 477
 478 /* If maxval is missing then there's no range to check. In case minval is
 479  * missing then it's considered to be 0.
 480  */
 481 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 482 {
 483         const struct bond_opt_value *minval, *maxval;
 484
 485         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 486         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 487         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 488                 return false;
 489
 490         return true;
 491 }
 492
 493 /**
 494  * bond_opt_parse - parse option value
 495  * @opt: the option to parse against
 496  * @val: value to parse
 497  *
 498  * This function tries to extract the value from @val and check if it's
 499  * a possible match for the option and returns NULL if a match isn't found,
 500  * or the struct_opt_value that matched. It also strips the new line from
 501  * @val->string if it's present.
 502  */
 503 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 504                                             struct bond_opt_value *val)
 505 {
 506         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 507         const struct bond_opt_value *tbl;
 508         const struct bond_opt_value *ret = NULL;
 509         bool checkval;
 510         int i, rv;
 511
 512         /* No parsing if the option wants a raw val */
 513         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 514                 return val;
 515
 516         tbl = opt->values;
 517         if (!tbl)
 518                 goto out;
 519
 520         /* ULLONG_MAX is used to bypass string processing */
 521         checkval = val->value != ULLONG_MAX;
 522         if (!checkval) {
 523                 if (!val->string)
 524                         goto out;
 525                 p = strchr(val->string, '\n');
 526                 if (p)
 527                         *p = '\0';
 528                 for (p = val->string; *p; p++)
 529                         if (!(isdigit(*p) || isspace(*p)))
 530                                 break;
 531                 /* The following code extracts the string to match or the value
 532                  * and sets checkval appropriately
 533                  */
 534                 if (*p) {
 535                         rv = sscanf(val->string, "%32s", valstr);
 536                 } else {
 537                         rv = sscanf(val->string, "%llu", &val->value);
 538                         checkval = true;
 539                 }
 540                 if (!rv)
 541                         goto out;
 542         }
 543
 544         for (i = 0; tbl[i].string; i++) {
 545                 /* Check for exact match */
 546                 if (checkval) {
 547                         if (val->value == tbl[i].value)
 548                                 ret = &tbl[i];
 549                 } else {
 550                         if (!strcmp(valstr, "default") &&
 551                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 552                                 ret = &tbl[i];
 553
 554                         if (!strcmp(valstr, tbl[i].string))
 555                                 ret = &tbl[i];
 556                 }
 557                 /* Found an exact match */
 558                 if (ret)
 559                         goto out;
 560         }
 561         /* Possible range match */
 562         if (checkval && bond_opt_check_range(opt, val->value))
 563                 ret = val;
 564 out:
 565         return ret;
 566 }
 567
 568 /* Check opt's dependencies against bond mode and currently set options */
 569 static int bond_opt_check_deps(struct bonding *bond,
 570                                const struct bond_option *opt)
 571 {
 572         struct bond_params *params = &bond->params;
 573
 574         if (test_bit(params->mode, &opt->unsuppmodes))
 575                 return -EACCES;
 576         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 577                 return -ENOTEMPTY;
 578         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 579                 return -EBUSY;
 580
 581         return 0;
 582 }
 583
 584 static void bond_opt_dep_print(struct bonding *bond,
 585                                const struct bond_option *opt)
 586 {
 587         const struct bond_opt_value *modeval;
 588         struct bond_params *params;
 589
 590         params = &bond->params;
 591         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 592         if (test_bit(params->mode, &opt->unsuppmodes))
 593                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 594                            opt->name, modeval->string, modeval->value);
 595 }
 596
 597 static void bond_opt_error_interpret(struct bonding *bond,
 598                                      const struct bond_option *opt,
 599                                      int error, const struct bond_opt_value *val)
 600 {
 601         const struct bond_opt_value *minval, *maxval;
 602         char *p;
 603
 604         switch (error) {
 605         case -EINVAL:
 606                 if (val) {
 607                         if (val->string) {
 608                                 /* sometimes RAWVAL opts may have new lines */
 609                                 p = strchr(val->string, '\n');
 610                                 if (p)
 611                                         *p = '\0';
 612                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 613                                            opt->name, val->string);
 614                         } else {
 615                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 616                                            opt->name, val->value);
 617                         }
 618                 }
 619                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 620                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 621                 if (!maxval)
 622                         break;
 623                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 624                            opt->name, minval ? minval->value : 0, maxval->value);
 625                 break;
 626         case -EACCES:
 627                 bond_opt_dep_print(bond, opt);
 628                 break;
 629         case -ENOTEMPTY:
 630                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 631                            opt->name);
 632                 break;
 633         case -EBUSY:
 634                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 635                            opt->name);
 636                 break;
 637         default:
 638                 break;
 639         }
 640 }
 641
 642 /**
 643  * __bond_opt_set - set a bonding option
 644  * @bond: target bond device
 645  * @option: option to set
 646  * @val: value to set it to
 647  *
 648  * This function is used to change the bond's option value, it can be
 649  * used for both enabling/changing an option and for disabling it. RTNL lock
 650  * must be obtained before calling this function.
 651  */
 652 int __bond_opt_set(struct bonding *bond,
 653                    unsigned int option, struct bond_opt_value *val)
 654 {
 655         const struct bond_opt_value *retval = NULL;
 656         const struct bond_option *opt;
 657         int ret = -ENOENT;
 658
 659         ASSERT_RTNL();
 660
 661         opt = bond_opt_get(option);
 662         if (WARN_ON(!val) || WARN_ON(!opt))
 663                 goto out;
 664         ret = bond_opt_check_deps(bond, opt);
 665         if (ret)
 666                 goto out;
 667         retval = bond_opt_parse(opt, val);
 668         if (!retval) {
 669                 ret = -EINVAL;
 670                 goto out;
 671         }
 672         ret = opt->set(bond, retval);
 673 out:
 674         if (ret)
 675                 bond_opt_error_interpret(bond, opt, ret, val);
 676         else if (bond->dev->reg_state == NETREG_REGISTERED)
 677                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 678
 679         return ret;
 680 }
 681
 682 /**
 683  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 684  * @bond: target bond device
 685  * @option: option to set
 686  * @buf: value to set it to
 687  *
 688  * This function tries to acquire RTNL without blocking and if successful
 689  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 690  */
 691 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 692 {
 693         struct bond_opt_value optval;
 694         int ret;
 695
 696         if (!rtnl_trylock())
 697                 return restart_syscall();
 698         bond_opt_initstr(&optval, buf);
 699         ret = __bond_opt_set(bond, option, &optval);
 700         rtnl_unlock();
 701
 702         return ret;
 703 }
 704
 705 /**
 706  * bond_opt_get - get a pointer to an option
 707  * @option: option for which to return a pointer
 708  *
 709  * This function checks if option is valid and if so returns a pointer
 710  * to its entry in the bond_opts[] option array.
 711  */
 712 const struct bond_option *bond_opt_get(unsigned int option)
 713 {
 714         if (!BOND_OPT_VALID(option))
 715                 return NULL;
 716
 717         return &bond_opts[option];
 718 }
 719
 720 static int bond_option_mode_set(struct bonding *bond,
 721                                 const struct bond_opt_value *newval)
 722 {
 723         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 724                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 725                             newval->string);
 726                 /* disable arp monitoring */
 727                 bond->params.arp_interval = 0;
 728                 /* set miimon to default value */
 729                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 730                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
 731                             bond->params.miimon);
 732         }
 733
 734         /* don't cache arp_validate between modes */
 735         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 736         bond->params.mode = newval->value;
 737
 738         return 0;
 739 }
 740
 741 static int bond_option_active_slave_set(struct bonding *bond,
 742                                         const struct bond_opt_value *newval)
 743 {
 744         char ifname[IFNAMSIZ] = { 0, };
 745         struct net_device *slave_dev;
 746         int ret = 0;
 747
 748         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 749         if (!strlen(ifname) || newval->string[0] == '\n') {
 750                 slave_dev = NULL;
 751         } else {
 752                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 753                 if (!slave_dev)
 754                         return -ENODEV;
 755         }
 756
 757         if (slave_dev) {
 758                 if (!netif_is_bond_slave(slave_dev)) {
 759                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 760                                    slave_dev->name);
 761                         return -EINVAL;
 762                 }
 763
 764                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 765                         netdev_err(bond->dev, "Device %s is not our slave\n",
 766                                    slave_dev->name);
 767                         return -EINVAL;
 768                 }
 769         }
 770
 771         block_netpoll_tx();
 772         /* check to see if we are clearing active */
 773         if (!slave_dev) {
 774                 netdev_info(bond->dev, "Clearing current active slave\n");
 775                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 776                 bond_select_active_slave(bond);
 777         } else {
 778                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 779                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 780
 781                 BUG_ON(!new_active);
 782
 783                 if (new_active == old_active) {
 784                         /* do nothing */
 785                         netdev_info(bond->dev, "%s is already the current active slave\n",
 786                                     new_active->dev->name);
 787                 } else {
 788                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 789                             bond_slave_is_up(new_active)) {
 790                                 netdev_info(bond->dev, "Setting %s as active slave\n",
 791                                             new_active->dev->name);
 792                                 bond_change_active_slave(bond, new_active);
 793                         } else {
 794                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 795                                            new_active->dev->name,
 796                                            new_active->dev->name);
 797                                 ret = -EINVAL;
 798                         }
 799                 }
 800         }
 801         unblock_netpoll_tx();
 802
 803         return ret;
 804 }
 805
 806 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 807  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 808  * start it.
 809  */
 810 static int bond_option_miimon_set(struct bonding *bond,
 811                                   const struct bond_opt_value *newval)
 812 {
 813         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
 814                     newval->value);
 815         bond->params.miimon = newval->value;
 816         if (bond->params.updelay)
 817                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 818                         bond->params.updelay * bond->params.miimon);
 819         if (bond->params.downdelay)
 820                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 821                             bond->params.downdelay * bond->params.miimon);
 822         if (newval->value && bond->params.arp_interval) {
 823                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 824                 bond->params.arp_interval = 0;
 825                 if (bond->params.arp_validate)
 826                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 827         }
 828         if (bond->dev->flags & IFF_UP) {
 829                 /* If the interface is up, we may need to fire off
 830                  * the MII timer. If the interface is down, the
 831                  * timer will get fired off when the open function
 832                  * is called.
 833                  */
 834                 if (!newval->value) {
 835                         cancel_delayed_work_sync(&bond->mii_work);
 836                 } else {
 837                         cancel_delayed_work_sync(&bond->arp_work);
 838                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 839                 }
 840         }
 841
 842         return 0;
 843 }
 844
 845 /* Set up and down delays. These must be multiples of the
 846  * MII monitoring value, and are stored internally as the multiplier.
 847  * Thus, we must translate to MS for the real world.
 848  */
 849 static int bond_option_updelay_set(struct bonding *bond,
 850                                    const struct bond_opt_value *newval)
 851 {
 852         int value = newval->value;
 853
 854         if (!bond->params.miimon) {
 855                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 856                 return -EPERM;
 857         }
 858         if ((value % bond->params.miimon) != 0) {
 859                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 860                             value, bond->params.miimon,
 861                             (value / bond->params.miimon) *
 862                             bond->params.miimon);
 863         }
 864         bond->params.updelay = value / bond->params.miimon;
 865         netdev_info(bond->dev, "Setting up delay to %d\n",
 866                     bond->params.updelay * bond->params.miimon);
 867
 868         return 0;
 869 }
 870
 871 static int bond_option_downdelay_set(struct bonding *bond,
 872                                      const struct bond_opt_value *newval)
 873 {
 874         int value = newval->value;
 875
 876         if (!bond->params.miimon) {
 877                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 878                 return -EPERM;
 879         }
 880         if ((value % bond->params.miimon) != 0) {
 881                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 882                             value, bond->params.miimon,
 883                             (value / bond->params.miimon) *
 884                             bond->params.miimon);
 885         }
 886         bond->params.downdelay = value / bond->params.miimon;
 887         netdev_info(bond->dev, "Setting down delay to %d\n",
 888                     bond->params.downdelay * bond->params.miimon);
 889
 890         return 0;
 891 }
 892
 893 static int bond_option_use_carrier_set(struct bonding *bond,
 894                                        const struct bond_opt_value *newval)
 895 {
 896         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
 897                     newval->value);
 898         bond->params.use_carrier = newval->value;
 899
 900         return 0;
 901 }
 902
 903 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 904  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 905  * we must start it.
 906  */
 907 static int bond_option_arp_interval_set(struct bonding *bond,
 908                                         const struct bond_opt_value *newval)
 909 {
 910         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
 911                     newval->value);
 912         bond->params.arp_interval = newval->value;
 913         if (newval->value) {
 914                 if (bond->params.miimon) {
 915                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 916                         bond->params.miimon = 0;
 917                 }
 918                 if (!bond->params.arp_targets[0])
 919                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 920         }
 921         if (bond->dev->flags & IFF_UP) {
 922                 /* If the interface is up, we may need to fire off
 923                  * the ARP timer.  If the interface is down, the
 924                  * timer will get fired off when the open function
 925                  * is called.
 926                  */
 927                 if (!newval->value) {
 928                         if (bond->params.arp_validate)
 929                                 bond->recv_probe = NULL;
 930                         cancel_delayed_work_sync(&bond->arp_work);
 931                 } else {
 932                         /* arp_validate can be set only in active-backup mode */
 933                         bond->recv_probe = bond_arp_rcv;
 934                         cancel_delayed_work_sync(&bond->mii_work);
 935                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 936                 }
 937         }
 938
 939         return 0;
 940 }
 941
 942 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 943                                             __be32 target,
 944                                             unsigned long last_rx)
 945 {
 946         __be32 *targets = bond->params.arp_targets;
 947         struct list_head *iter;
 948         struct slave *slave;
 949
 950         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 951                 bond_for_each_slave(bond, slave, iter)
 952                         slave->target_last_arp_rx[slot] = last_rx;
 953                 targets[slot] = target;
 954         }
 955 }
 956
 957 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 958 {
 959         __be32 *targets = bond->params.arp_targets;
 960         int ind;
 961
 962         if (!bond_is_ip_target_ok(target)) {
 963                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 964                            &target);
 965                 return -EINVAL;
 966         }
 967
 968         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 969                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 970                            &target);
 971                 return -EINVAL;
 972         }
 973
 974         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 975         if (ind == -1) {
 976                 netdev_err(bond->dev, "ARP target table is full!\n");
 977                 return -EINVAL;
 978         }
 979
 980         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
 981
 982         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 983
 984         return 0;
 985 }
 986
 987 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 988 {
 989         return _bond_option_arp_ip_target_add(bond, target);
 990 }
 991
 992 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 993 {
 994         __be32 *targets = bond->params.arp_targets;
 995         struct list_head *iter;
 996         struct slave *slave;
 997         unsigned long *targets_rx;
 998         int ind, i;
 999
1000         if (!bond_is_ip_target_ok(target)) {
1001                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1002                            &target);
1003                 return -EINVAL;
1004         }
1005
1006         ind = bond_get_targets_ip(targets, target);
1007         if (ind == -1) {
1008                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1009                            &target);
1010                 return -EINVAL;
1011         }
1012
1013         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1014                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1015
1016         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1017
1018         bond_for_each_slave(bond, slave, iter) {
1019                 targets_rx = slave->target_last_arp_rx;
1020                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1021                         targets_rx[i] = targets_rx[i+1];
1022                 targets_rx[i] = 0;
1023         }
1024         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1025                 targets[i] = targets[i+1];
1026         targets[i] = 0;
1027
1028         return 0;
1029 }
1030
1031 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1032 {
1033         int i;
1034
1035         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1036                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1037 }
1038
1039 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1040                                           const struct bond_opt_value *newval)
1041 {
1042         int ret = -EPERM;
1043         __be32 target;
1044
1045         if (newval->string) {
1046                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1047                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1048                                    &target);
1049                         return ret;
1050                 }
1051                 if (newval->string[0] == '+')
1052                         ret = bond_option_arp_ip_target_add(bond, target);
1053                 else if (newval->string[0] == '-')
1054                         ret = bond_option_arp_ip_target_rem(bond, target);
1055                 else
1056                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1057         } else {
1058                 target = newval->value;
1059                 ret = bond_option_arp_ip_target_add(bond, target);
1060         }
1061
1062         return ret;
1063 }
1064
1065 static int bond_option_arp_validate_set(struct bonding *bond,
1066                                         const struct bond_opt_value *newval)
1067 {
1068         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1069                     newval->string, newval->value);
1070
1071         if (bond->dev->flags & IFF_UP) {
1072                 if (!newval->value)
1073                         bond->recv_probe = NULL;
1074                 else if (bond->params.arp_interval)
1075                         bond->recv_probe = bond_arp_rcv;
1076         }
1077         bond->params.arp_validate = newval->value;
1078
1079         return 0;
1080 }
1081
1082 static int bond_option_arp_all_targets_set(struct bonding *bond,
1083                                            const struct bond_opt_value *newval)
1084 {
1085         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1086                     newval->string, newval->value);
1087         bond->params.arp_all_targets = newval->value;
1088
1089         return 0;
1090 }
1091
1092 static int bond_option_primary_set(struct bonding *bond,
1093                                    const struct bond_opt_value *newval)
1094 {
1095         char *p, *primary = newval->string;
1096         struct list_head *iter;
1097         struct slave *slave;
1098
1099         block_netpoll_tx();
1100
1101         p = strchr(primary, '\n');
1102         if (p)
1103                 *p = '\0';
1104         /* check to see if we are clearing primary */
1105         if (!strlen(primary)) {
1106                 netdev_info(bond->dev, "Setting primary slave to None\n");
1107                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1108                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1109                 bond_select_active_slave(bond);
1110                 goto out;
1111         }
1112
1113         bond_for_each_slave(bond, slave, iter) {
1114                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1115                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1116                                     slave->dev->name);
1117                         rcu_assign_pointer(bond->primary_slave, slave);
1118                         strcpy(bond->params.primary, slave->dev->name);
1119                         bond_select_active_slave(bond);
1120                         goto out;
1121                 }
1122         }
1123
1124         if (rtnl_dereference(bond->primary_slave)) {
1125                 netdev_info(bond->dev, "Setting primary slave to None\n");
1126                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1127                 bond_select_active_slave(bond);
1128         }
1129         strncpy(bond->params.primary, primary, IFNAMSIZ);
1130         bond->params.primary[IFNAMSIZ - 1] = 0;
1131
1132         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1133                     primary, bond->dev->name);
1134
1135 out:
1136         unblock_netpoll_tx();
1137
1138         return 0;
1139 }
1140
1141 static int bond_option_primary_reselect_set(struct bonding *bond,
1142                                             const struct bond_opt_value *newval)
1143 {
1144         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1145                     newval->string, newval->value);
1146         bond->params.primary_reselect = newval->value;
1147
1148         block_netpoll_tx();
1149         bond_select_active_slave(bond);
1150         unblock_netpoll_tx();
1151
1152         return 0;
1153 }
1154
1155 static int bond_option_fail_over_mac_set(struct bonding *bond,
1156                                          const struct bond_opt_value *newval)
1157 {
1158         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1159                     newval->string, newval->value);
1160         bond->params.fail_over_mac = newval->value;
1161
1162         return 0;
1163 }
1164
1165 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1166                                             const struct bond_opt_value *newval)
1167 {
1168         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1169                     newval->string, newval->value);
1170         bond->params.xmit_policy = newval->value;
1171
1172         return 0;
1173 }
1174
1175 static int bond_option_resend_igmp_set(struct bonding *bond,
1176                                        const struct bond_opt_value *newval)
1177 {
1178         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1179                     newval->value);
1180         bond->params.resend_igmp = newval->value;
1181
1182         return 0;
1183 }
1184
1185 static int bond_option_num_peer_notif_set(struct bonding *bond,
1186                                    const struct bond_opt_value *newval)
1187 {
1188         bond->params.num_peer_notif = newval->value;
1189
1190         return 0;
1191 }
1192
1193 static int bond_option_all_slaves_active_set(struct bonding *bond,
1194                                              const struct bond_opt_value *newval)
1195 {
1196         struct list_head *iter;
1197         struct slave *slave;
1198
1199         if (newval->value == bond->params.all_slaves_active)
1200                 return 0;
1201         bond->params.all_slaves_active = newval->value;
1202         bond_for_each_slave(bond, slave, iter) {
1203                 if (!bond_is_active_slave(slave)) {
1204                         if (newval->value)
1205                                 slave->inactive = 0;
1206                         else
1207                                 slave->inactive = 1;
1208                 }
1209         }
1210
1211         return 0;
1212 }
1213
1214 static int bond_option_min_links_set(struct bonding *bond,
1215                                      const struct bond_opt_value *newval)
1216 {
1217         netdev_info(bond->dev, "Setting min links value to %llu\n",
1218                     newval->value);
1219         bond->params.min_links = newval->value;
1220         bond_set_carrier(bond);
1221
1222         return 0;
1223 }
1224
1225 static int bond_option_lp_interval_set(struct bonding *bond,
1226                                        const struct bond_opt_value *newval)
1227 {
1228         bond->params.lp_interval = newval->value;
1229
1230         return 0;
1231 }
1232
1233 static int bond_option_pps_set(struct bonding *bond,
1234                                const struct bond_opt_value *newval)
1235 {
1236         bond->params.packets_per_slave = newval->value;
1237         if (newval->value > 0) {
1238                 bond->params.reciprocal_packets_per_slave =
1239                         reciprocal_value(newval->value);
1240         } else {
1241                 /* reciprocal_packets_per_slave is unused if
1242                  * packets_per_slave is 0 or 1, just initialize it
1243                  */
1244                 bond->params.reciprocal_packets_per_slave =
1245                         (struct reciprocal_value) { 0 };
1246         }
1247
1248         return 0;
1249 }
1250
1251 static int bond_option_lacp_rate_set(struct bonding *bond,
1252                                      const struct bond_opt_value *newval)
1253 {
1254         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1255                     newval->string, newval->value);
1256         bond->params.lacp_fast = newval->value;
1257         bond_3ad_update_lacp_rate(bond);
1258
1259         return 0;
1260 }
1261
1262 static int bond_option_ad_select_set(struct bonding *bond,
1263                                      const struct bond_opt_value *newval)
1264 {
1265         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1266                     newval->string, newval->value);
1267         bond->params.ad_select = newval->value;
1268
1269         return 0;
1270 }
1271
1272 static int bond_option_queue_id_set(struct bonding *bond,
1273                                     const struct bond_opt_value *newval)
1274 {
1275         struct slave *slave, *update_slave;
1276         struct net_device *sdev;
1277         struct list_head *iter;
1278         char *delim;
1279         int ret = 0;
1280         u16 qid;
1281
1282         /* delim will point to queue id if successful */
1283         delim = strchr(newval->string, ':');
1284         if (!delim)
1285                 goto err_no_cmd;
1286
1287         /* Terminate string that points to device name and bump it
1288          * up one, so we can read the queue id there.
1289          */
1290         *delim = '\0';
1291         if (sscanf(++delim, "%hd\n", &qid) != 1)
1292                 goto err_no_cmd;
1293
1294         /* Check buffer length, valid ifname and queue id */
1295         if (!dev_valid_name(newval->string) ||
1296             qid > bond->dev->real_num_tx_queues)
1297                 goto err_no_cmd;
1298
1299         /* Get the pointer to that interface if it exists */
1300         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1301         if (!sdev)
1302                 goto err_no_cmd;
1303
1304         /* Search for thes slave and check for duplicate qids */
1305         update_slave = NULL;
1306         bond_for_each_slave(bond, slave, iter) {
1307                 if (sdev == slave->dev)
1308                         /* We don't need to check the matching
1309                          * slave for dups, since we're overwriting it
1310                          */
1311                         update_slave = slave;
1312                 else if (qid && qid == slave->queue_id) {
1313                         goto err_no_cmd;
1314                 }
1315         }
1316
1317         if (!update_slave)
1318                 goto err_no_cmd;
1319
1320         /* Actually set the qids for the slave */
1321         update_slave->queue_id = qid;
1322
1323 out:
1324         return ret;
1325
1326 err_no_cmd:
1327         netdev_info(bond->dev, "invalid input for queue_id set\n");
1328         ret = -EPERM;
1329         goto out;
1330
1331 }
1332
1333 static int bond_option_slaves_set(struct bonding *bond,
1334                                   const struct bond_opt_value *newval)
1335 {
1336         char command[IFNAMSIZ + 1] = { 0, };
1337         struct net_device *dev;
1338         char *ifname;
1339         int ret;
1340
1341         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1342         ifname = command + 1;
1343         if ((strlen(command) <= 1) ||
1344             !dev_valid_name(ifname))
1345                 goto err_no_cmd;
1346
1347         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1348         if (!dev) {
1349                 netdev_info(bond->dev, "interface %s does not exist!\n",
1350                             ifname);
1351                 ret = -ENODEV;
1352                 goto out;
1353         }
1354
1355         switch (command[0]) {
1356         case '+':
1357                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1358                 ret = bond_enslave(bond->dev, dev);
1359                 break;
1360
1361         case '-':
1362                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1363                 ret = bond_release(bond->dev, dev);
1364                 break;
1365
1366         default:
1367                 goto err_no_cmd;
1368         }
1369
1370 out:
1371         return ret;
1372
1373 err_no_cmd:
1374         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1375         ret = -EPERM;
1376         goto out;
1377 }
1378
1379 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1380                                           const struct bond_opt_value *newval)
1381 {
1382         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1383                     newval->string, newval->value);
1384         bond->params.tlb_dynamic_lb = newval->value;
1385
1386         return 0;
1387 }
1388
1389 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1390                                              const struct bond_opt_value *newval)
1391 {
1392         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1393                     newval->value);
1394
1395         bond->params.ad_actor_sys_prio = newval->value;
1396         bond_3ad_update_ad_actor_settings(bond);
1397
1398         return 0;
1399 }
1400
1401 static int bond_option_ad_actor_system_set(struct bonding *bond,
1402                                            const struct bond_opt_value *newval)
1403 {
1404         u8 macaddr[ETH_ALEN];
1405         u8 *mac;
1406         int i;
1407
1408         if (newval->string) {
1409                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1410                            &macaddr[0], &macaddr[1], &macaddr[2],
1411                            &macaddr[3], &macaddr[4], &macaddr[5]);
1412                 if (i != ETH_ALEN)
1413                         goto err;
1414                 mac = macaddr;
1415         } else {
1416                 mac = (u8 *)&newval->value;
1417         }
1418
1419         if (!is_valid_ether_addr(mac))
1420                 goto err;
1421
1422         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1423         ether_addr_copy(bond->params.ad_actor_system, mac);
1424         bond_3ad_update_ad_actor_settings(bond);
1425
1426         return 0;
1427
1428 err:
1429         netdev_err(bond->dev, "Invalid MAC address.\n");
1430         return -EINVAL;
1431 }
1432
1433 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1434                                             const struct bond_opt_value *newval)
1435 {
1436         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1437                     newval->value);
1438
1439         bond->params.ad_user_port_key = newval->value;
1440         return 0;
1441 }