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) | BIT(BOND_MODE_ALB)),
 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
 677         return ret;
 678 }
 679 /**
 680  * __bond_opt_set_notify - set a bonding option
 681  * @bond: target bond device
 682  * @option: option to set
 683  * @val: value to set it to
 684  *
 685  * This function is used to change the bond's option value and trigger
 686  * a notification to user sapce. It can be used for both enabling/changing
 687  * an option and for disabling it. RTNL lock must be obtained before calling
 688  * this function.
 689  */
 690 int __bond_opt_set_notify(struct bonding *bond,
 691                           unsigned int option, struct bond_opt_value *val)
 692 {
 693         int ret = -ENOENT;
 694
 695         ASSERT_RTNL();
 696
 697         ret = __bond_opt_set(bond, option, val);
 698
 699         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 700                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 701
 702         return ret;
 703 }
 704
 705 /**
 706  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 707  * @bond: target bond device
 708  * @option: option to set
 709  * @buf: value to set it to
 710  *
 711  * This function tries to acquire RTNL without blocking and if successful
 712  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 713  */
 714 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 715 {
 716         struct bond_opt_value optval;
 717         int ret;
 718
 719         if (!rtnl_trylock())
 720                 return restart_syscall();
 721         bond_opt_initstr(&optval, buf);
 722         ret = __bond_opt_set_notify(bond, option, &optval);
 723         rtnl_unlock();
 724
 725         return ret;
 726 }
 727
 728 /**
 729  * bond_opt_get - get a pointer to an option
 730  * @option: option for which to return a pointer
 731  *
 732  * This function checks if option is valid and if so returns a pointer
 733  * to its entry in the bond_opts[] option array.
 734  */
 735 const struct bond_option *bond_opt_get(unsigned int option)
 736 {
 737         if (!BOND_OPT_VALID(option))
 738                 return NULL;
 739
 740         return &bond_opts[option];
 741 }
 742
 743 static int bond_option_mode_set(struct bonding *bond,
 744                                 const struct bond_opt_value *newval)
 745 {
 746         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
 747                 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 748                            newval->string);
 749                 /* disable arp monitoring */
 750                 bond->params.arp_interval = 0;
 751                 /* set miimon to default value */
 752                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 753                 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 754                            bond->params.miimon);
 755         }
 756
 757         if (newval->value == BOND_MODE_ALB)
 758                 bond->params.tlb_dynamic_lb = 1;
 759
 760         /* don't cache arp_validate between modes */
 761         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 762         bond->params.mode = newval->value;
 763
 764         return 0;
 765 }
 766
 767 static int bond_option_active_slave_set(struct bonding *bond,
 768                                         const struct bond_opt_value *newval)
 769 {
 770         char ifname[IFNAMSIZ] = { 0, };
 771         struct net_device *slave_dev;
 772         int ret = 0;
 773
 774         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 775         if (!strlen(ifname) || newval->string[0] == '\n') {
 776                 slave_dev = NULL;
 777         } else {
 778                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 779                 if (!slave_dev)
 780                         return -ENODEV;
 781         }
 782
 783         if (slave_dev) {
 784                 if (!netif_is_bond_slave(slave_dev)) {
 785                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
 786                                    slave_dev->name);
 787                         return -EINVAL;
 788                 }
 789
 790                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 791                         netdev_err(bond->dev, "Device %s is not our slave\n",
 792                                    slave_dev->name);
 793                         return -EINVAL;
 794                 }
 795         }
 796
 797         block_netpoll_tx();
 798         /* check to see if we are clearing active */
 799         if (!slave_dev) {
 800                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 801                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 802                 bond_select_active_slave(bond);
 803         } else {
 804                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 805                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 806
 807                 BUG_ON(!new_active);
 808
 809                 if (new_active == old_active) {
 810                         /* do nothing */
 811                         netdev_dbg(bond->dev, "%s is already the current active slave\n",
 812                                    new_active->dev->name);
 813                 } else {
 814                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 815                             bond_slave_is_up(new_active)) {
 816                                 netdev_dbg(bond->dev, "Setting %s as active slave\n",
 817                                            new_active->dev->name);
 818                                 bond_change_active_slave(bond, new_active);
 819                         } else {
 820                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
 821                                            new_active->dev->name,
 822                                            new_active->dev->name);
 823                                 ret = -EINVAL;
 824                         }
 825                 }
 826         }
 827         unblock_netpoll_tx();
 828
 829         return ret;
 830 }
 831
 832 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 833  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 834  * start it.
 835  */
 836 static int bond_option_miimon_set(struct bonding *bond,
 837                                   const struct bond_opt_value *newval)
 838 {
 839         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 840                    newval->value);
 841         bond->params.miimon = newval->value;
 842         if (bond->params.updelay)
 843                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 844                            bond->params.updelay * bond->params.miimon);
 845         if (bond->params.downdelay)
 846                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 847                            bond->params.downdelay * bond->params.miimon);
 848         if (newval->value && bond->params.arp_interval) {
 849                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 850                 bond->params.arp_interval = 0;
 851                 if (bond->params.arp_validate)
 852                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 853         }
 854         if (bond->dev->flags & IFF_UP) {
 855                 /* If the interface is up, we may need to fire off
 856                  * the MII timer. If the interface is down, the
 857                  * timer will get fired off when the open function
 858                  * is called.
 859                  */
 860                 if (!newval->value) {
 861                         cancel_delayed_work_sync(&bond->mii_work);
 862                 } else {
 863                         cancel_delayed_work_sync(&bond->arp_work);
 864                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 865                 }
 866         }
 867
 868         return 0;
 869 }
 870
 871 /* Set up and down delays. These must be multiples of the
 872  * MII monitoring value, and are stored internally as the multiplier.
 873  * Thus, we must translate to MS for the real world.
 874  */
 875 static int bond_option_updelay_set(struct bonding *bond,
 876                                    const struct bond_opt_value *newval)
 877 {
 878         int value = newval->value;
 879
 880         if (!bond->params.miimon) {
 881                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
 882                 return -EPERM;
 883         }
 884         if ((value % bond->params.miimon) != 0) {
 885                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 886                             value, bond->params.miimon,
 887                             (value / bond->params.miimon) *
 888                             bond->params.miimon);
 889         }
 890         bond->params.updelay = value / bond->params.miimon;
 891         netdev_dbg(bond->dev, "Setting up delay to %d\n",
 892                    bond->params.updelay * bond->params.miimon);
 893
 894         return 0;
 895 }
 896
 897 static int bond_option_downdelay_set(struct bonding *bond,
 898                                      const struct bond_opt_value *newval)
 899 {
 900         int value = newval->value;
 901
 902         if (!bond->params.miimon) {
 903                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
 904                 return -EPERM;
 905         }
 906         if ((value % bond->params.miimon) != 0) {
 907                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 908                             value, bond->params.miimon,
 909                             (value / bond->params.miimon) *
 910                             bond->params.miimon);
 911         }
 912         bond->params.downdelay = value / bond->params.miimon;
 913         netdev_dbg(bond->dev, "Setting down delay to %d\n",
 914                    bond->params.downdelay * bond->params.miimon);
 915
 916         return 0;
 917 }
 918
 919 static int bond_option_use_carrier_set(struct bonding *bond,
 920                                        const struct bond_opt_value *newval)
 921 {
 922         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
 923                    newval->value);
 924         bond->params.use_carrier = newval->value;
 925
 926         return 0;
 927 }
 928
 929 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 930  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 931  * we must start it.
 932  */
 933 static int bond_option_arp_interval_set(struct bonding *bond,
 934                                         const struct bond_opt_value *newval)
 935 {
 936         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
 937                    newval->value);
 938         bond->params.arp_interval = newval->value;
 939         if (newval->value) {
 940                 if (bond->params.miimon) {
 941                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 942                         bond->params.miimon = 0;
 943                 }
 944                 if (!bond->params.arp_targets[0])
 945                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 946         }
 947         if (bond->dev->flags & IFF_UP) {
 948                 /* If the interface is up, we may need to fire off
 949                  * the ARP timer.  If the interface is down, the
 950                  * timer will get fired off when the open function
 951                  * is called.
 952                  */
 953                 if (!newval->value) {
 954                         if (bond->params.arp_validate)
 955                                 bond->recv_probe = NULL;
 956                         cancel_delayed_work_sync(&bond->arp_work);
 957                 } else {
 958                         /* arp_validate can be set only in active-backup mode */
 959                         bond->recv_probe = bond_arp_rcv;
 960                         cancel_delayed_work_sync(&bond->mii_work);
 961                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 962                 }
 963         }
 964
 965         return 0;
 966 }
 967
 968 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 969                                             __be32 target,
 970                                             unsigned long last_rx)
 971 {
 972         __be32 *targets = bond->params.arp_targets;
 973         struct list_head *iter;
 974         struct slave *slave;
 975
 976         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 977                 bond_for_each_slave(bond, slave, iter)
 978                         slave->target_last_arp_rx[slot] = last_rx;
 979                 targets[slot] = target;
 980         }
 981 }
 982
 983 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 984 {
 985         __be32 *targets = bond->params.arp_targets;
 986         int ind;
 987
 988         if (!bond_is_ip_target_ok(target)) {
 989                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
 990                            &target);
 991                 return -EINVAL;
 992         }
 993
 994         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 995                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
 996                            &target);
 997                 return -EINVAL;
 998         }
 999
1000         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1001         if (ind == -1) {
1002                 netdev_err(bond->dev, "ARP target table is full!\n");
1003                 return -EINVAL;
1004         }
1005
1006         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1007
1008         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1009
1010         return 0;
1011 }
1012
1013 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1014 {
1015         return _bond_option_arp_ip_target_add(bond, target);
1016 }
1017
1018 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1019 {
1020         __be32 *targets = bond->params.arp_targets;
1021         struct list_head *iter;
1022         struct slave *slave;
1023         unsigned long *targets_rx;
1024         int ind, i;
1025
1026         if (!bond_is_ip_target_ok(target)) {
1027                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1028                            &target);
1029                 return -EINVAL;
1030         }
1031
1032         ind = bond_get_targets_ip(targets, target);
1033         if (ind == -1) {
1034                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1035                            &target);
1036                 return -EINVAL;
1037         }
1038
1039         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1040                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1041
1042         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1043
1044         bond_for_each_slave(bond, slave, iter) {
1045                 targets_rx = slave->target_last_arp_rx;
1046                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1047                         targets_rx[i] = targets_rx[i+1];
1048                 targets_rx[i] = 0;
1049         }
1050         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1051                 targets[i] = targets[i+1];
1052         targets[i] = 0;
1053
1054         return 0;
1055 }
1056
1057 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1058 {
1059         int i;
1060
1061         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1062                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1063 }
1064
1065 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1066                                           const struct bond_opt_value *newval)
1067 {
1068         int ret = -EPERM;
1069         __be32 target;
1070
1071         if (newval->string) {
1072                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1073                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1074                                    &target);
1075                         return ret;
1076                 }
1077                 if (newval->string[0] == '+')
1078                         ret = bond_option_arp_ip_target_add(bond, target);
1079                 else if (newval->string[0] == '-')
1080                         ret = bond_option_arp_ip_target_rem(bond, target);
1081                 else
1082                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1083         } else {
1084                 target = newval->value;
1085                 ret = bond_option_arp_ip_target_add(bond, target);
1086         }
1087
1088         return ret;
1089 }
1090
1091 static int bond_option_arp_validate_set(struct bonding *bond,
1092                                         const struct bond_opt_value *newval)
1093 {
1094         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1095                    newval->string, newval->value);
1096
1097         if (bond->dev->flags & IFF_UP) {
1098                 if (!newval->value)
1099                         bond->recv_probe = NULL;
1100                 else if (bond->params.arp_interval)
1101                         bond->recv_probe = bond_arp_rcv;
1102         }
1103         bond->params.arp_validate = newval->value;
1104
1105         return 0;
1106 }
1107
1108 static int bond_option_arp_all_targets_set(struct bonding *bond,
1109                                            const struct bond_opt_value *newval)
1110 {
1111         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1112                    newval->string, newval->value);
1113         bond->params.arp_all_targets = newval->value;
1114
1115         return 0;
1116 }
1117
1118 static int bond_option_primary_set(struct bonding *bond,
1119                                    const struct bond_opt_value *newval)
1120 {
1121         char *p, *primary = newval->string;
1122         struct list_head *iter;
1123         struct slave *slave;
1124
1125         block_netpoll_tx();
1126
1127         p = strchr(primary, '\n');
1128         if (p)
1129                 *p = '\0';
1130         /* check to see if we are clearing primary */
1131         if (!strlen(primary)) {
1132                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1133                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1134                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1135                 bond_select_active_slave(bond);
1136                 goto out;
1137         }
1138
1139         bond_for_each_slave(bond, slave, iter) {
1140                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1141                         netdev_dbg(bond->dev, "Setting %s as primary slave\n",
1142                                    slave->dev->name);
1143                         rcu_assign_pointer(bond->primary_slave, slave);
1144                         strcpy(bond->params.primary, slave->dev->name);
1145                         bond_select_active_slave(bond);
1146                         goto out;
1147                 }
1148         }
1149
1150         if (rtnl_dereference(bond->primary_slave)) {
1151                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1152                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1153                 bond_select_active_slave(bond);
1154         }
1155         strncpy(bond->params.primary, primary, IFNAMSIZ);
1156         bond->params.primary[IFNAMSIZ - 1] = 0;
1157
1158         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1159                    primary, bond->dev->name);
1160
1161 out:
1162         unblock_netpoll_tx();
1163
1164         return 0;
1165 }
1166
1167 static int bond_option_primary_reselect_set(struct bonding *bond,
1168                                             const struct bond_opt_value *newval)
1169 {
1170         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1171                    newval->string, newval->value);
1172         bond->params.primary_reselect = newval->value;
1173
1174         block_netpoll_tx();
1175         bond_select_active_slave(bond);
1176         unblock_netpoll_tx();
1177
1178         return 0;
1179 }
1180
1181 static int bond_option_fail_over_mac_set(struct bonding *bond,
1182                                          const struct bond_opt_value *newval)
1183 {
1184         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1185                    newval->string, newval->value);
1186         bond->params.fail_over_mac = newval->value;
1187
1188         return 0;
1189 }
1190
1191 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1192                                             const struct bond_opt_value *newval)
1193 {
1194         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1195                    newval->string, newval->value);
1196         bond->params.xmit_policy = newval->value;
1197
1198         return 0;
1199 }
1200
1201 static int bond_option_resend_igmp_set(struct bonding *bond,
1202                                        const struct bond_opt_value *newval)
1203 {
1204         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1205                    newval->value);
1206         bond->params.resend_igmp = newval->value;
1207
1208         return 0;
1209 }
1210
1211 static int bond_option_num_peer_notif_set(struct bonding *bond,
1212                                    const struct bond_opt_value *newval)
1213 {
1214         bond->params.num_peer_notif = newval->value;
1215
1216         return 0;
1217 }
1218
1219 static int bond_option_all_slaves_active_set(struct bonding *bond,
1220                                              const struct bond_opt_value *newval)
1221 {
1222         struct list_head *iter;
1223         struct slave *slave;
1224
1225         if (newval->value == bond->params.all_slaves_active)
1226                 return 0;
1227         bond->params.all_slaves_active = newval->value;
1228         bond_for_each_slave(bond, slave, iter) {
1229                 if (!bond_is_active_slave(slave)) {
1230                         if (newval->value)
1231                                 slave->inactive = 0;
1232                         else
1233                                 slave->inactive = 1;
1234                 }
1235         }
1236
1237         return 0;
1238 }
1239
1240 static int bond_option_min_links_set(struct bonding *bond,
1241                                      const struct bond_opt_value *newval)
1242 {
1243         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1244                    newval->value);
1245         bond->params.min_links = newval->value;
1246         bond_set_carrier(bond);
1247
1248         return 0;
1249 }
1250
1251 static int bond_option_lp_interval_set(struct bonding *bond,
1252                                        const struct bond_opt_value *newval)
1253 {
1254         bond->params.lp_interval = newval->value;
1255
1256         return 0;
1257 }
1258
1259 static int bond_option_pps_set(struct bonding *bond,
1260                                const struct bond_opt_value *newval)
1261 {
1262         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1263                    newval->value);
1264         bond->params.packets_per_slave = newval->value;
1265         if (newval->value > 0) {
1266                 bond->params.reciprocal_packets_per_slave =
1267                         reciprocal_value(newval->value);
1268         } else {
1269                 /* reciprocal_packets_per_slave is unused if
1270                  * packets_per_slave is 0 or 1, just initialize it
1271                  */
1272                 bond->params.reciprocal_packets_per_slave =
1273                         (struct reciprocal_value) { 0 };
1274         }
1275
1276         return 0;
1277 }
1278
1279 static int bond_option_lacp_rate_set(struct bonding *bond,
1280                                      const struct bond_opt_value *newval)
1281 {
1282         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1283                    newval->string, newval->value);
1284         bond->params.lacp_fast = newval->value;
1285         bond_3ad_update_lacp_rate(bond);
1286
1287         return 0;
1288 }
1289
1290 static int bond_option_ad_select_set(struct bonding *bond,
1291                                      const struct bond_opt_value *newval)
1292 {
1293         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1294                    newval->string, newval->value);
1295         bond->params.ad_select = newval->value;
1296
1297         return 0;
1298 }
1299
1300 static int bond_option_queue_id_set(struct bonding *bond,
1301                                     const struct bond_opt_value *newval)
1302 {
1303         struct slave *slave, *update_slave;
1304         struct net_device *sdev;
1305         struct list_head *iter;
1306         char *delim;
1307         int ret = 0;
1308         u16 qid;
1309
1310         /* delim will point to queue id if successful */
1311         delim = strchr(newval->string, ':');
1312         if (!delim)
1313                 goto err_no_cmd;
1314
1315         /* Terminate string that points to device name and bump it
1316          * up one, so we can read the queue id there.
1317          */
1318         *delim = '\0';
1319         if (sscanf(++delim, "%hd\n", &qid) != 1)
1320                 goto err_no_cmd;
1321
1322         /* Check buffer length, valid ifname and queue id */
1323         if (!dev_valid_name(newval->string) ||
1324             qid > bond->dev->real_num_tx_queues)
1325                 goto err_no_cmd;
1326
1327         /* Get the pointer to that interface if it exists */
1328         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1329         if (!sdev)
1330                 goto err_no_cmd;
1331
1332         /* Search for thes slave and check for duplicate qids */
1333         update_slave = NULL;
1334         bond_for_each_slave(bond, slave, iter) {
1335                 if (sdev == slave->dev)
1336                         /* We don't need to check the matching
1337                          * slave for dups, since we're overwriting it
1338                          */
1339                         update_slave = slave;
1340                 else if (qid && qid == slave->queue_id) {
1341                         goto err_no_cmd;
1342                 }
1343         }
1344
1345         if (!update_slave)
1346                 goto err_no_cmd;
1347
1348         /* Actually set the qids for the slave */
1349         update_slave->queue_id = qid;
1350
1351 out:
1352         return ret;
1353
1354 err_no_cmd:
1355         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1356         ret = -EPERM;
1357         goto out;
1358
1359 }
1360
1361 static int bond_option_slaves_set(struct bonding *bond,
1362                                   const struct bond_opt_value *newval)
1363 {
1364         char command[IFNAMSIZ + 1] = { 0, };
1365         struct net_device *dev;
1366         char *ifname;
1367         int ret;
1368
1369         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1370         ifname = command + 1;
1371         if ((strlen(command) <= 1) ||
1372             !dev_valid_name(ifname))
1373                 goto err_no_cmd;
1374
1375         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1376         if (!dev) {
1377                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1378                            ifname);
1379                 ret = -ENODEV;
1380                 goto out;
1381         }
1382
1383         switch (command[0]) {
1384         case '+':
1385                 netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
1386                 ret = bond_enslave(bond->dev, dev, NULL);
1387                 break;
1388
1389         case '-':
1390                 netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
1391                 ret = bond_release(bond->dev, dev);
1392                 break;
1393
1394         default:
1395                 goto err_no_cmd;
1396         }
1397
1398 out:
1399         return ret;
1400
1401 err_no_cmd:
1402         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1403         ret = -EPERM;
1404         goto out;
1405 }
1406
1407 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1408                                           const struct bond_opt_value *newval)
1409 {
1410         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1411                    newval->string, newval->value);
1412         bond->params.tlb_dynamic_lb = newval->value;
1413
1414         return 0;
1415 }
1416
1417 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1418                                              const struct bond_opt_value *newval)
1419 {
1420         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1421                    newval->value);
1422
1423         bond->params.ad_actor_sys_prio = newval->value;
1424         bond_3ad_update_ad_actor_settings(bond);
1425
1426         return 0;
1427 }
1428
1429 static int bond_option_ad_actor_system_set(struct bonding *bond,
1430                                            const struct bond_opt_value *newval)
1431 {
1432         u8 macaddr[ETH_ALEN];
1433         u8 *mac;
1434
1435         if (newval->string) {
1436                 if (!mac_pton(newval->string, macaddr))
1437                         goto err;
1438                 mac = macaddr;
1439         } else {
1440                 mac = (u8 *)&newval->value;
1441         }
1442
1443         if (!is_valid_ether_addr(mac))
1444                 goto err;
1445
1446         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1447         ether_addr_copy(bond->params.ad_actor_system, mac);
1448         bond_3ad_update_ad_actor_settings(bond);
1449
1450         return 0;
1451
1452 err:
1453         netdev_err(bond->dev, "Invalid MAC address.\n");
1454         return -EINVAL;
1455 }
1456
1457 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1458                                             const struct bond_opt_value *newval)
1459 {
1460         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1461                    newval->value);
1462
1463         bond->params.ad_user_port_key = newval->value;
1464         return 0;
1465 }