drivers/net/bonding/bond_options.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/bond/bond_options.c - bonding options
   4  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   5  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   6  */
   7
   8 #include <linux/errno.h>
   9 #include <linux/if.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/rcupdate.h>
  13 #include <linux/ctype.h>
  14 #include <linux/inet.h>
  15 #include <linux/sched/signal.h>
  16
  17 #include <net/bonding.h>
  18
  19 static int bond_option_active_slave_set(struct bonding *bond,
  20                                         const struct bond_opt_value *newval);
  21 static int bond_option_miimon_set(struct bonding *bond,
  22                                   const struct bond_opt_value *newval);
  23 static int bond_option_updelay_set(struct bonding *bond,
  24                                    const struct bond_opt_value *newval);
  25 static int bond_option_downdelay_set(struct bonding *bond,
  26                                      const struct bond_opt_value *newval);
  27 static int bond_option_peer_notif_delay_set(struct bonding *bond,
  28                                             const struct bond_opt_value *newval);
  29 static int bond_option_use_carrier_set(struct bonding *bond,
  30                                        const struct bond_opt_value *newval);
  31 static int bond_option_arp_interval_set(struct bonding *bond,
  32                                         const struct bond_opt_value *newval);
  33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
  36                                           const struct bond_opt_value *newval);
  37 static int bond_option_arp_validate_set(struct bonding *bond,
  38                                         const struct bond_opt_value *newval);
  39 static int bond_option_arp_all_targets_set(struct bonding *bond,
  40                                            const struct bond_opt_value *newval);
  41 static int bond_option_primary_set(struct bonding *bond,
  42                                    const struct bond_opt_value *newval);
  43 static int bond_option_primary_reselect_set(struct bonding *bond,
  44                                             const struct bond_opt_value *newval);
  45 static int bond_option_fail_over_mac_set(struct bonding *bond,
  46                                          const struct bond_opt_value *newval);
  47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  48                                             const struct bond_opt_value *newval);
  49 static int bond_option_resend_igmp_set(struct bonding *bond,
  50                                        const struct bond_opt_value *newval);
  51 static int bond_option_num_peer_notif_set(struct bonding *bond,
  52                                           const struct bond_opt_value *newval);
  53 static int bond_option_all_slaves_active_set(struct bonding *bond,
  54                                              const struct bond_opt_value *newval);
  55 static int bond_option_min_links_set(struct bonding *bond,
  56                                      const struct bond_opt_value *newval);
  57 static int bond_option_lp_interval_set(struct bonding *bond,
  58                                        const struct bond_opt_value *newval);
  59 static int bond_option_pps_set(struct bonding *bond,
  60                                const struct bond_opt_value *newval);
  61 static int bond_option_lacp_rate_set(struct bonding *bond,
  62                                      const struct bond_opt_value *newval);
  63 static int bond_option_ad_select_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_queue_id_set(struct bonding *bond,
  66                                     const struct bond_opt_value *newval);
  67 static int bond_option_mode_set(struct bonding *bond,
  68                                 const struct bond_opt_value *newval);
  69 static int bond_option_slaves_set(struct bonding *bond,
  70                                   const struct bond_opt_value *newval);
  71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  74                                              const struct bond_opt_value *newval);
  75 static int bond_option_ad_actor_system_set(struct bonding *bond,
  76                                            const struct bond_opt_value *newval);
  77 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  78                                             const struct bond_opt_value *newval);
  79
  80
  81 static const struct bond_opt_value bond_mode_tbl[] = {
  82         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  83         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  84         { "balance-xor",   BOND_MODE_XOR,          0},
  85         { "broadcast",     BOND_MODE_BROADCAST,    0},
  86         { "802.3ad",       BOND_MODE_8023AD,       0},
  87         { "balance-tlb",   BOND_MODE_TLB,          0},
  88         { "balance-alb",   BOND_MODE_ALB,          0},
  89         { NULL,            -1,                     0},
  90 };
  91
  92 static const struct bond_opt_value bond_pps_tbl[] = {
  93         { "default", 1,         BOND_VALFLAG_DEFAULT},
  94         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  95         { NULL,      -1,        0},
  96 };
  97
  98 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  99         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
 100         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
 101         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
 102         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
 103         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
 104         { NULL,       -1,                       0},
 105 };
 106
 107 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 108         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 109         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 110         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 111         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 112         { "filter",             BOND_ARP_FILTER,                0},
 113         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 114         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 115         { NULL,                 -1,                             0},
 116 };
 117
 118 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 119         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 120         { "all", BOND_ARP_TARGETS_ALL, 0},
 121         { NULL,  -1,                   0},
 122 };
 123
 124 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 125         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 126         { "active", BOND_FOM_ACTIVE, 0},
 127         { "follow", BOND_FOM_FOLLOW, 0},
 128         { NULL,     -1,              0},
 129 };
 130
 131 static const struct bond_opt_value bond_intmax_tbl[] = {
 132         { "off",     0,       BOND_VALFLAG_DEFAULT},
 133         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 134         { NULL,      -1,      0}
 135 };
 136
 137 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 138         { "slow", AD_LACP_SLOW, 0},
 139         { "fast", AD_LACP_FAST, 0},
 140         { NULL,   -1,           0},
 141 };
 142
 143 static const struct bond_opt_value bond_ad_select_tbl[] = {
 144         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 145         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 146         { "count",     BOND_AD_COUNT,     0},
 147         { NULL,        -1,                0},
 148 };
 149
 150 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 151         { "off",     0,   0},
 152         { "maxval",  255, BOND_VALFLAG_MAX},
 153         { "default", 1,   BOND_VALFLAG_DEFAULT},
 154         { NULL,      -1,  0}
 155 };
 156
 157 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 158         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 159         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 160         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 161         { NULL,      -1},
 162 };
 163
 164 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 165         { "off", 0,  0},
 166         { "on",  1,  BOND_VALFLAG_DEFAULT},
 167         { NULL,  -1, 0}
 168 };
 169
 170 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 171         { "off", 0,  BOND_VALFLAG_DEFAULT},
 172         { "on",  1,  0},
 173         { NULL,  -1, 0}
 174 };
 175
 176 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 177         { "off",     0,   0},
 178         { "maxval",  255, BOND_VALFLAG_MAX},
 179         { "default", 1,   BOND_VALFLAG_DEFAULT},
 180         { NULL,      -1,  0}
 181 };
 182
 183 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 184         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 185         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 186         { NULL,      -1,      0},
 187 };
 188
 189 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 190         { "off", 0,  0},
 191         { "on",  1,  BOND_VALFLAG_DEFAULT},
 192         { NULL,  -1, 0}
 193 };
 194
 195 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 196         { "minval",  1,     BOND_VALFLAG_MIN},
 197         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 198         { NULL,      -1,    0},
 199 };
 200
 201 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 202         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 203         { "maxval",  1023,  BOND_VALFLAG_MAX},
 204         { NULL,      -1,    0},
 205 };
 206
 207 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 208         [BOND_OPT_MODE] = {
 209                 .id = BOND_OPT_MODE,
 210                 .name = "mode",
 211                 .desc = "bond device mode",
 212                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 213                 .values = bond_mode_tbl,
 214                 .set = bond_option_mode_set
 215         },
 216         [BOND_OPT_PACKETS_PER_SLAVE] = {
 217                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 218                 .name = "packets_per_slave",
 219                 .desc = "Packets to send per slave in RR mode",
 220                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 221                 .values = bond_pps_tbl,
 222                 .set = bond_option_pps_set
 223         },
 224         [BOND_OPT_XMIT_HASH] = {
 225                 .id = BOND_OPT_XMIT_HASH,
 226                 .name = "xmit_hash_policy",
 227                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 228                 .values = bond_xmit_hashtype_tbl,
 229                 .set = bond_option_xmit_hash_policy_set
 230         },
 231         [BOND_OPT_ARP_VALIDATE] = {
 232                 .id = BOND_OPT_ARP_VALIDATE,
 233                 .name = "arp_validate",
 234                 .desc = "validate src/dst of ARP probes",
 235                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 236                                BIT(BOND_MODE_ALB),
 237                 .values = bond_arp_validate_tbl,
 238                 .set = bond_option_arp_validate_set
 239         },
 240         [BOND_OPT_ARP_ALL_TARGETS] = {
 241                 .id = BOND_OPT_ARP_ALL_TARGETS,
 242                 .name = "arp_all_targets",
 243                 .desc = "fail on any/all arp targets timeout",
 244                 .values = bond_arp_all_targets_tbl,
 245                 .set = bond_option_arp_all_targets_set
 246         },
 247         [BOND_OPT_FAIL_OVER_MAC] = {
 248                 .id = BOND_OPT_FAIL_OVER_MAC,
 249                 .name = "fail_over_mac",
 250                 .desc = "For active-backup, do not set all slaves to the same MAC",
 251                 .flags = BOND_OPTFLAG_NOSLAVES,
 252                 .values = bond_fail_over_mac_tbl,
 253                 .set = bond_option_fail_over_mac_set
 254         },
 255         [BOND_OPT_ARP_INTERVAL] = {
 256                 .id = BOND_OPT_ARP_INTERVAL,
 257                 .name = "arp_interval",
 258                 .desc = "arp interval in milliseconds",
 259                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 260                                BIT(BOND_MODE_ALB),
 261                 .values = bond_intmax_tbl,
 262                 .set = bond_option_arp_interval_set
 263         },
 264         [BOND_OPT_ARP_TARGETS] = {
 265                 .id = BOND_OPT_ARP_TARGETS,
 266                 .name = "arp_ip_target",
 267                 .desc = "arp targets in n.n.n.n form",
 268                 .flags = BOND_OPTFLAG_RAWVAL,
 269                 .set = bond_option_arp_ip_targets_set
 270         },
 271         [BOND_OPT_DOWNDELAY] = {
 272                 .id = BOND_OPT_DOWNDELAY,
 273                 .name = "downdelay",
 274                 .desc = "Delay before considering link down, in milliseconds",
 275                 .values = bond_intmax_tbl,
 276                 .set = bond_option_downdelay_set
 277         },
 278         [BOND_OPT_UPDELAY] = {
 279                 .id = BOND_OPT_UPDELAY,
 280                 .name = "updelay",
 281                 .desc = "Delay before considering link up, in milliseconds",
 282                 .values = bond_intmax_tbl,
 283                 .set = bond_option_updelay_set
 284         },
 285         [BOND_OPT_LACP_RATE] = {
 286                 .id = BOND_OPT_LACP_RATE,
 287                 .name = "lacp_rate",
 288                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 289                 .flags = BOND_OPTFLAG_IFDOWN,
 290                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 291                 .values = bond_lacp_rate_tbl,
 292                 .set = bond_option_lacp_rate_set
 293         },
 294         [BOND_OPT_MINLINKS] = {
 295                 .id = BOND_OPT_MINLINKS,
 296                 .name = "min_links",
 297                 .desc = "Minimum number of available links before turning on carrier",
 298                 .values = bond_intmax_tbl,
 299                 .set = bond_option_min_links_set
 300         },
 301         [BOND_OPT_AD_SELECT] = {
 302                 .id = BOND_OPT_AD_SELECT,
 303                 .name = "ad_select",
 304                 .desc = "803.ad aggregation selection logic",
 305                 .flags = BOND_OPTFLAG_IFDOWN,
 306                 .values = bond_ad_select_tbl,
 307                 .set = bond_option_ad_select_set
 308         },
 309         [BOND_OPT_NUM_PEER_NOTIF] = {
 310                 .id = BOND_OPT_NUM_PEER_NOTIF,
 311                 .name = "num_unsol_na",
 312                 .desc = "Number of peer notifications to send on failover event",
 313                 .values = bond_num_peer_notif_tbl,
 314                 .set = bond_option_num_peer_notif_set
 315         },
 316         [BOND_OPT_MIIMON] = {
 317                 .id = BOND_OPT_MIIMON,
 318                 .name = "miimon",
 319                 .desc = "Link check interval in milliseconds",
 320                 .values = bond_intmax_tbl,
 321                 .set = bond_option_miimon_set
 322         },
 323         [BOND_OPT_PRIMARY] = {
 324                 .id = BOND_OPT_PRIMARY,
 325                 .name = "primary",
 326                 .desc = "Primary network device to use",
 327                 .flags = BOND_OPTFLAG_RAWVAL,
 328                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 329                                                 BIT(BOND_MODE_TLB) |
 330                                                 BIT(BOND_MODE_ALB)),
 331                 .set = bond_option_primary_set
 332         },
 333         [BOND_OPT_PRIMARY_RESELECT] = {
 334                 .id = BOND_OPT_PRIMARY_RESELECT,
 335                 .name = "primary_reselect",
 336                 .desc = "Reselect primary slave once it comes up",
 337                 .values = bond_primary_reselect_tbl,
 338                 .set = bond_option_primary_reselect_set
 339         },
 340         [BOND_OPT_USE_CARRIER] = {
 341                 .id = BOND_OPT_USE_CARRIER,
 342                 .name = "use_carrier",
 343                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 344                 .values = bond_use_carrier_tbl,
 345                 .set = bond_option_use_carrier_set
 346         },
 347         [BOND_OPT_ACTIVE_SLAVE] = {
 348                 .id = BOND_OPT_ACTIVE_SLAVE,
 349                 .name = "active_slave",
 350                 .desc = "Currently active slave",
 351                 .flags = BOND_OPTFLAG_RAWVAL,
 352                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 353                                                 BIT(BOND_MODE_TLB) |
 354                                                 BIT(BOND_MODE_ALB)),
 355                 .set = bond_option_active_slave_set
 356         },
 357         [BOND_OPT_QUEUE_ID] = {
 358                 .id = BOND_OPT_QUEUE_ID,
 359                 .name = "queue_id",
 360                 .desc = "Set queue id of a slave",
 361                 .flags = BOND_OPTFLAG_RAWVAL,
 362                 .set = bond_option_queue_id_set
 363         },
 364         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 365                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 366                 .name = "all_slaves_active",
 367                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 368                 .values = bond_all_slaves_active_tbl,
 369                 .set = bond_option_all_slaves_active_set
 370         },
 371         [BOND_OPT_RESEND_IGMP] = {
 372                 .id = BOND_OPT_RESEND_IGMP,
 373                 .name = "resend_igmp",
 374                 .desc = "Number of IGMP membership reports to send on link failure",
 375                 .values = bond_resend_igmp_tbl,
 376                 .set = bond_option_resend_igmp_set
 377         },
 378         [BOND_OPT_LP_INTERVAL] = {
 379                 .id = BOND_OPT_LP_INTERVAL,
 380                 .name = "lp_interval",
 381                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 382                 .values = bond_lp_interval_tbl,
 383                 .set = bond_option_lp_interval_set
 384         },
 385         [BOND_OPT_SLAVES] = {
 386                 .id = BOND_OPT_SLAVES,
 387                 .name = "slaves",
 388                 .desc = "Slave membership management",
 389                 .flags = BOND_OPTFLAG_RAWVAL,
 390                 .set = bond_option_slaves_set
 391         },
 392         [BOND_OPT_TLB_DYNAMIC_LB] = {
 393                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 394                 .name = "tlb_dynamic_lb",
 395                 .desc = "Enable dynamic flow shuffling",
 396                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
 397                 .values = bond_tlb_dynamic_lb_tbl,
 398                 .flags = BOND_OPTFLAG_IFDOWN,
 399                 .set = bond_option_tlb_dynamic_lb_set,
 400         },
 401         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 402                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 403                 .name = "ad_actor_sys_prio",
 404                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 405                 .values = bond_ad_actor_sys_prio_tbl,
 406                 .set = bond_option_ad_actor_sys_prio_set,
 407         },
 408         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 409                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 410                 .name = "ad_actor_system",
 411                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 412                 .flags = BOND_OPTFLAG_RAWVAL,
 413                 .set = bond_option_ad_actor_system_set,
 414         },
 415         [BOND_OPT_AD_USER_PORT_KEY] = {
 416                 .id = BOND_OPT_AD_USER_PORT_KEY,
 417                 .name = "ad_user_port_key",
 418                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 419                 .flags = BOND_OPTFLAG_IFDOWN,
 420                 .values = bond_ad_user_port_key_tbl,
 421                 .set = bond_option_ad_user_port_key_set,
 422         },
 423         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 424                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 425                 .name = "num_grat_arp",
 426                 .desc = "Number of peer notifications to send on failover event",
 427                 .values = bond_num_peer_notif_tbl,
 428                 .set = bond_option_num_peer_notif_set
 429         },
 430         [BOND_OPT_PEER_NOTIF_DELAY] = {
 431                 .id = BOND_OPT_PEER_NOTIF_DELAY,
 432                 .name = "peer_notif_delay",
 433                 .desc = "Delay between each peer notification on failover event, in milliseconds",
 434                 .values = bond_intmax_tbl,
 435                 .set = bond_option_peer_notif_delay_set
 436         }
 437 };
 438
 439 /* Searches for an option by name */
 440 const struct bond_option *bond_opt_get_by_name(const char *name)
 441 {
 442         const struct bond_option *opt;
 443         int option;
 444
 445         for (option = 0; option < BOND_OPT_LAST; option++) {
 446                 opt = bond_opt_get(option);
 447                 if (opt && !strcmp(opt->name, name))
 448                         return opt;
 449         }
 450
 451         return NULL;
 452 }
 453
 454 /* Searches for a value in opt's values[] table */
 455 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 456 {
 457         const struct bond_option *opt;
 458         int i;
 459
 460         opt = bond_opt_get(option);
 461         if (WARN_ON(!opt))
 462                 return NULL;
 463         for (i = 0; opt->values && opt->values[i].string; i++)
 464                 if (opt->values[i].value == val)
 465                         return &opt->values[i];
 466
 467         return NULL;
 468 }
 469
 470 /* Searches for a value in opt's values[] table which matches the flagmask */
 471 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 472                                                        u32 flagmask)
 473 {
 474         int i;
 475
 476         for (i = 0; opt->values && opt->values[i].string; i++)
 477                 if (opt->values[i].flags & flagmask)
 478                         return &opt->values[i];
 479
 480         return NULL;
 481 }
 482
 483 /* If maxval is missing then there's no range to check. In case minval is
 484  * missing then it's considered to be 0.
 485  */
 486 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 487 {
 488         const struct bond_opt_value *minval, *maxval;
 489
 490         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 491         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 492         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 493                 return false;
 494
 495         return true;
 496 }
 497
 498 /**
 499  * bond_opt_parse - parse option value
 500  * @opt: the option to parse against
 501  * @val: value to parse
 502  *
 503  * This function tries to extract the value from @val and check if it's
 504  * a possible match for the option and returns NULL if a match isn't found,
 505  * or the struct_opt_value that matched. It also strips the new line from
 506  * @val->string if it's present.
 507  */
 508 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 509                                             struct bond_opt_value *val)
 510 {
 511         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 512         const struct bond_opt_value *tbl;
 513         const struct bond_opt_value *ret = NULL;
 514         bool checkval;
 515         int i, rv;
 516
 517         /* No parsing if the option wants a raw val */
 518         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 519                 return val;
 520
 521         tbl = opt->values;
 522         if (!tbl)
 523                 goto out;
 524
 525         /* ULLONG_MAX is used to bypass string processing */
 526         checkval = val->value != ULLONG_MAX;
 527         if (!checkval) {
 528                 if (!val->string)
 529                         goto out;
 530                 p = strchr(val->string, '\n');
 531                 if (p)
 532                         *p = '\0';
 533                 for (p = val->string; *p; p++)
 534                         if (!(isdigit(*p) || isspace(*p)))
 535                                 break;
 536                 /* The following code extracts the string to match or the value
 537                  * and sets checkval appropriately
 538                  */
 539                 if (*p) {
 540                         rv = sscanf(val->string, "%32s", valstr);
 541                 } else {
 542                         rv = sscanf(val->string, "%llu", &val->value);
 543                         checkval = true;
 544                 }
 545                 if (!rv)
 546                         goto out;
 547         }
 548
 549         for (i = 0; tbl[i].string; i++) {
 550                 /* Check for exact match */
 551                 if (checkval) {
 552                         if (val->value == tbl[i].value)
 553                                 ret = &tbl[i];
 554                 } else {
 555                         if (!strcmp(valstr, "default") &&
 556                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 557                                 ret = &tbl[i];
 558
 559                         if (!strcmp(valstr, tbl[i].string))
 560                                 ret = &tbl[i];
 561                 }
 562                 /* Found an exact match */
 563                 if (ret)
 564                         goto out;
 565         }
 566         /* Possible range match */
 567         if (checkval && bond_opt_check_range(opt, val->value))
 568                 ret = val;
 569 out:
 570         return ret;
 571 }
 572
 573 /* Check opt's dependencies against bond mode and currently set options */
 574 static int bond_opt_check_deps(struct bonding *bond,
 575                                const struct bond_option *opt)
 576 {
 577         struct bond_params *params = &bond->params;
 578
 579         if (test_bit(params->mode, &opt->unsuppmodes))
 580                 return -EACCES;
 581         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 582                 return -ENOTEMPTY;
 583         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 584                 return -EBUSY;
 585
 586         return 0;
 587 }
 588
 589 static void bond_opt_dep_print(struct bonding *bond,
 590                                const struct bond_option *opt)
 591 {
 592         const struct bond_opt_value *modeval;
 593         struct bond_params *params;
 594
 595         params = &bond->params;
 596         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 597         if (test_bit(params->mode, &opt->unsuppmodes))
 598                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 599                            opt->name, modeval->string, modeval->value);
 600 }
 601
 602 static void bond_opt_error_interpret(struct bonding *bond,
 603                                      const struct bond_option *opt,
 604                                      int error, const struct bond_opt_value *val)
 605 {
 606         const struct bond_opt_value *minval, *maxval;
 607         char *p;
 608
 609         switch (error) {
 610         case -EINVAL:
 611                 if (val) {
 612                         if (val->string) {
 613                                 /* sometimes RAWVAL opts may have new lines */
 614                                 p = strchr(val->string, '\n');
 615                                 if (p)
 616                                         *p = '\0';
 617                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 618                                            opt->name, val->string);
 619                         } else {
 620                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 621                                            opt->name, val->value);
 622                         }
 623                 }
 624                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 625                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 626                 if (!maxval)
 627                         break;
 628                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 629                            opt->name, minval ? minval->value : 0, maxval->value);
 630                 break;
 631         case -EACCES:
 632                 bond_opt_dep_print(bond, opt);
 633                 break;
 634         case -ENOTEMPTY:
 635                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 636                            opt->name);
 637                 break;
 638         case -EBUSY:
 639                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 640                            opt->name);
 641                 break;
 642         default:
 643                 break;
 644         }
 645 }
 646
 647 /**
 648  * __bond_opt_set - set a bonding option
 649  * @bond: target bond device
 650  * @option: option to set
 651  * @val: value to set it to
 652  *
 653  * This function is used to change the bond's option value, it can be
 654  * used for both enabling/changing an option and for disabling it. RTNL lock
 655  * must be obtained before calling this function.
 656  */
 657 int __bond_opt_set(struct bonding *bond,
 658                    unsigned int option, struct bond_opt_value *val)
 659 {
 660         const struct bond_opt_value *retval = NULL;
 661         const struct bond_option *opt;
 662         int ret = -ENOENT;
 663
 664         ASSERT_RTNL();
 665
 666         opt = bond_opt_get(option);
 667         if (WARN_ON(!val) || WARN_ON(!opt))
 668                 goto out;
 669         ret = bond_opt_check_deps(bond, opt);
 670         if (ret)
 671                 goto out;
 672         retval = bond_opt_parse(opt, val);
 673         if (!retval) {
 674                 ret = -EINVAL;
 675                 goto out;
 676         }
 677         ret = opt->set(bond, retval);
 678 out:
 679         if (ret)
 680                 bond_opt_error_interpret(bond, opt, ret, val);
 681
 682         return ret;
 683 }
 684 /**
 685  * __bond_opt_set_notify - set a bonding option
 686  * @bond: target bond device
 687  * @option: option to set
 688  * @val: value to set it to
 689  *
 690  * This function is used to change the bond's option value and trigger
 691  * a notification to user sapce. It can be used for both enabling/changing
 692  * an option and for disabling it. RTNL lock must be obtained before calling
 693  * this function.
 694  */
 695 int __bond_opt_set_notify(struct bonding *bond,
 696                           unsigned int option, struct bond_opt_value *val)
 697 {
 698         int ret = -ENOENT;
 699
 700         ASSERT_RTNL();
 701
 702         ret = __bond_opt_set(bond, option, val);
 703
 704         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 705                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 706
 707         return ret;
 708 }
 709
 710 /**
 711  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 712  * @bond: target bond device
 713  * @option: option to set
 714  * @buf: value to set it to
 715  *
 716  * This function tries to acquire RTNL without blocking and if successful
 717  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 718  */
 719 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 720 {
 721         struct bond_opt_value optval;
 722         int ret;
 723
 724         if (!rtnl_trylock())
 725                 return restart_syscall();
 726         bond_opt_initstr(&optval, buf);
 727         ret = __bond_opt_set_notify(bond, option, &optval);
 728         rtnl_unlock();
 729
 730         return ret;
 731 }
 732
 733 /**
 734  * bond_opt_get - get a pointer to an option
 735  * @option: option for which to return a pointer
 736  *
 737  * This function checks if option is valid and if so returns a pointer
 738  * to its entry in the bond_opts[] option array.
 739  */
 740 const struct bond_option *bond_opt_get(unsigned int option)
 741 {
 742         if (!BOND_OPT_VALID(option))
 743                 return NULL;
 744
 745         return &bond_opts[option];
 746 }
 747
 748 static int bond_option_mode_set(struct bonding *bond,
 749                                 const struct bond_opt_value *newval)
 750 {
 751         if (!bond_mode_uses_arp(newval->value)) {
 752                 if (bond->params.arp_interval) {
 753                         netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 754                                    newval->string);
 755                         /* disable arp monitoring */
 756                         bond->params.arp_interval = 0;
 757                 }
 758
 759                 if (!bond->params.miimon) {
 760                         /* set miimon to default value */
 761                         bond->params.miimon = BOND_DEFAULT_MIIMON;
 762                         netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 763                                    bond->params.miimon);
 764                 }
 765         }
 766
 767         if (newval->value == BOND_MODE_ALB)
 768                 bond->params.tlb_dynamic_lb = 1;
 769
 770         /* don't cache arp_validate between modes */
 771         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 772         bond->params.mode = newval->value;
 773
 774         return 0;
 775 }
 776
 777 static int bond_option_active_slave_set(struct bonding *bond,
 778                                         const struct bond_opt_value *newval)
 779 {
 780         char ifname[IFNAMSIZ] = { 0, };
 781         struct net_device *slave_dev;
 782         int ret = 0;
 783
 784         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 785         if (!strlen(ifname) || newval->string[0] == '\n') {
 786                 slave_dev = NULL;
 787         } else {
 788                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 789                 if (!slave_dev)
 790                         return -ENODEV;
 791         }
 792
 793         if (slave_dev) {
 794                 if (!netif_is_bond_slave(slave_dev)) {
 795                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 796                         return -EINVAL;
 797                 }
 798
 799                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 800                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 801                         return -EINVAL;
 802                 }
 803         }
 804
 805         block_netpoll_tx();
 806         /* check to see if we are clearing active */
 807         if (!slave_dev) {
 808                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 809                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 810                 bond_select_active_slave(bond);
 811         } else {
 812                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 813                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 814
 815                 BUG_ON(!new_active);
 816
 817                 if (new_active == old_active) {
 818                         /* do nothing */
 819                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 820                 } else {
 821                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 822                             bond_slave_is_up(new_active)) {
 823                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 824                                 bond_change_active_slave(bond, new_active);
 825                         } else {
 826                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 827                                           new_active->dev->name);
 828                                 ret = -EINVAL;
 829                         }
 830                 }
 831         }
 832         unblock_netpoll_tx();
 833
 834         return ret;
 835 }
 836
 837 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 838  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 839  * start it.
 840  */
 841 static int bond_option_miimon_set(struct bonding *bond,
 842                                   const struct bond_opt_value *newval)
 843 {
 844         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 845                    newval->value);
 846         bond->params.miimon = newval->value;
 847         if (bond->params.updelay)
 848                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 849                            bond->params.updelay * bond->params.miimon);
 850         if (bond->params.downdelay)
 851                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 852                            bond->params.downdelay * bond->params.miimon);
 853         if (bond->params.peer_notif_delay)
 854                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 855                            bond->params.peer_notif_delay * bond->params.miimon);
 856         if (newval->value && bond->params.arp_interval) {
 857                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 858                 bond->params.arp_interval = 0;
 859                 if (bond->params.arp_validate)
 860                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 861         }
 862         if (bond->dev->flags & IFF_UP) {
 863                 /* If the interface is up, we may need to fire off
 864                  * the MII timer. If the interface is down, the
 865                  * timer will get fired off when the open function
 866                  * is called.
 867                  */
 868                 if (!newval->value) {
 869                         cancel_delayed_work_sync(&bond->mii_work);
 870                 } else {
 871                         cancel_delayed_work_sync(&bond->arp_work);
 872                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 873                 }
 874         }
 875
 876         return 0;
 877 }
 878
 879 /* Set up, down and peer notification delays. These must be multiples
 880  * of the MII monitoring value, and are stored internally as the
 881  * multiplier. Thus, we must translate to MS for the real world.
 882  */
 883 static int _bond_option_delay_set(struct bonding *bond,
 884                                   const struct bond_opt_value *newval,
 885                                   const char *name,
 886                                   int *target)
 887 {
 888         int value = newval->value;
 889
 890         if (!bond->params.miimon) {
 891                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
 892                            name);
 893                 return -EPERM;
 894         }
 895         if ((value % bond->params.miimon) != 0) {
 896                 netdev_warn(bond->dev,
 897                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
 898                             name,
 899                             value, bond->params.miimon,
 900                             (value / bond->params.miimon) *
 901                             bond->params.miimon);
 902         }
 903         *target = value / bond->params.miimon;
 904         netdev_dbg(bond->dev, "Setting %s to %d\n",
 905                    name,
 906                    *target * bond->params.miimon);
 907
 908         return 0;
 909 }
 910
 911 static int bond_option_updelay_set(struct bonding *bond,
 912                                    const struct bond_opt_value *newval)
 913 {
 914         return _bond_option_delay_set(bond, newval, "up delay",
 915                                       &bond->params.updelay);
 916 }
 917
 918 static int bond_option_downdelay_set(struct bonding *bond,
 919                                      const struct bond_opt_value *newval)
 920 {
 921         return _bond_option_delay_set(bond, newval, "down delay",
 922                                       &bond->params.downdelay);
 923 }
 924
 925 static int bond_option_peer_notif_delay_set(struct bonding *bond,
 926                                             const struct bond_opt_value *newval)
 927 {
 928         int ret = _bond_option_delay_set(bond, newval,
 929                                          "peer notification delay",
 930                                          &bond->params.peer_notif_delay);
 931         return ret;
 932 }
 933
 934 static int bond_option_use_carrier_set(struct bonding *bond,
 935                                        const struct bond_opt_value *newval)
 936 {
 937         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
 938                    newval->value);
 939         bond->params.use_carrier = newval->value;
 940
 941         return 0;
 942 }
 943
 944 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
 945  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
 946  * we must start it.
 947  */
 948 static int bond_option_arp_interval_set(struct bonding *bond,
 949                                         const struct bond_opt_value *newval)
 950 {
 951         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
 952                    newval->value);
 953         bond->params.arp_interval = newval->value;
 954         if (newval->value) {
 955                 if (bond->params.miimon) {
 956                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
 957                         bond->params.miimon = 0;
 958                 }
 959                 if (!bond->params.arp_targets[0])
 960                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
 961         }
 962         if (bond->dev->flags & IFF_UP) {
 963                 /* If the interface is up, we may need to fire off
 964                  * the ARP timer.  If the interface is down, the
 965                  * timer will get fired off when the open function
 966                  * is called.
 967                  */
 968                 if (!newval->value) {
 969                         if (bond->params.arp_validate)
 970                                 bond->recv_probe = NULL;
 971                         cancel_delayed_work_sync(&bond->arp_work);
 972                 } else {
 973                         /* arp_validate can be set only in active-backup mode */
 974                         bond->recv_probe = bond_arp_rcv;
 975                         cancel_delayed_work_sync(&bond->mii_work);
 976                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 977                 }
 978         }
 979
 980         return 0;
 981 }
 982
 983 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 984                                             __be32 target,
 985                                             unsigned long last_rx)
 986 {
 987         __be32 *targets = bond->params.arp_targets;
 988         struct list_head *iter;
 989         struct slave *slave;
 990
 991         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 992                 bond_for_each_slave(bond, slave, iter)
 993                         slave->target_last_arp_rx[slot] = last_rx;
 994                 targets[slot] = target;
 995         }
 996 }
 997
 998 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 999 {
1000         __be32 *targets = bond->params.arp_targets;
1001         int ind;
1002
1003         if (!bond_is_ip_target_ok(target)) {
1004                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1005                            &target);
1006                 return -EINVAL;
1007         }
1008
1009         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1010                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1011                            &target);
1012                 return -EINVAL;
1013         }
1014
1015         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1016         if (ind == -1) {
1017                 netdev_err(bond->dev, "ARP target table is full!\n");
1018                 return -EINVAL;
1019         }
1020
1021         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1022
1023         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1024
1025         return 0;
1026 }
1027
1028 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1029 {
1030         return _bond_option_arp_ip_target_add(bond, target);
1031 }
1032
1033 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1034 {
1035         __be32 *targets = bond->params.arp_targets;
1036         struct list_head *iter;
1037         struct slave *slave;
1038         unsigned long *targets_rx;
1039         int ind, i;
1040
1041         if (!bond_is_ip_target_ok(target)) {
1042                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1043                            &target);
1044                 return -EINVAL;
1045         }
1046
1047         ind = bond_get_targets_ip(targets, target);
1048         if (ind == -1) {
1049                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1050                            &target);
1051                 return -EINVAL;
1052         }
1053
1054         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1055                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1056
1057         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1058
1059         bond_for_each_slave(bond, slave, iter) {
1060                 targets_rx = slave->target_last_arp_rx;
1061                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1062                         targets_rx[i] = targets_rx[i+1];
1063                 targets_rx[i] = 0;
1064         }
1065         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1066                 targets[i] = targets[i+1];
1067         targets[i] = 0;
1068
1069         return 0;
1070 }
1071
1072 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1073 {
1074         int i;
1075
1076         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1077                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1078 }
1079
1080 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1081                                           const struct bond_opt_value *newval)
1082 {
1083         int ret = -EPERM;
1084         __be32 target;
1085
1086         if (newval->string) {
1087                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1088                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1089                                    &target);
1090                         return ret;
1091                 }
1092                 if (newval->string[0] == '+')
1093                         ret = bond_option_arp_ip_target_add(bond, target);
1094                 else if (newval->string[0] == '-')
1095                         ret = bond_option_arp_ip_target_rem(bond, target);
1096                 else
1097                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1098         } else {
1099                 target = newval->value;
1100                 ret = bond_option_arp_ip_target_add(bond, target);
1101         }
1102
1103         return ret;
1104 }
1105
1106 static int bond_option_arp_validate_set(struct bonding *bond,
1107                                         const struct bond_opt_value *newval)
1108 {
1109         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1110                    newval->string, newval->value);
1111         bond->params.arp_validate = newval->value;
1112
1113         return 0;
1114 }
1115
1116 static int bond_option_arp_all_targets_set(struct bonding *bond,
1117                                            const struct bond_opt_value *newval)
1118 {
1119         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1120                    newval->string, newval->value);
1121         bond->params.arp_all_targets = newval->value;
1122
1123         return 0;
1124 }
1125
1126 static int bond_option_primary_set(struct bonding *bond,
1127                                    const struct bond_opt_value *newval)
1128 {
1129         char *p, *primary = newval->string;
1130         struct list_head *iter;
1131         struct slave *slave;
1132
1133         block_netpoll_tx();
1134
1135         p = strchr(primary, '\n');
1136         if (p)
1137                 *p = '\0';
1138         /* check to see if we are clearing primary */
1139         if (!strlen(primary)) {
1140                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1141                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1142                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1143                 bond_select_active_slave(bond);
1144                 goto out;
1145         }
1146
1147         bond_for_each_slave(bond, slave, iter) {
1148                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1149                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1150                         rcu_assign_pointer(bond->primary_slave, slave);
1151                         strcpy(bond->params.primary, slave->dev->name);
1152                         bond->force_primary = true;
1153                         bond_select_active_slave(bond);
1154                         goto out;
1155                 }
1156         }
1157
1158         if (rtnl_dereference(bond->primary_slave)) {
1159                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1160                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1161                 bond_select_active_slave(bond);
1162         }
1163         strncpy(bond->params.primary, primary, IFNAMSIZ);
1164         bond->params.primary[IFNAMSIZ - 1] = 0;
1165
1166         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1167                    primary);
1168
1169 out:
1170         unblock_netpoll_tx();
1171
1172         return 0;
1173 }
1174
1175 static int bond_option_primary_reselect_set(struct bonding *bond,
1176                                             const struct bond_opt_value *newval)
1177 {
1178         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1179                    newval->string, newval->value);
1180         bond->params.primary_reselect = newval->value;
1181
1182         block_netpoll_tx();
1183         bond_select_active_slave(bond);
1184         unblock_netpoll_tx();
1185
1186         return 0;
1187 }
1188
1189 static int bond_option_fail_over_mac_set(struct bonding *bond,
1190                                          const struct bond_opt_value *newval)
1191 {
1192         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1193                    newval->string, newval->value);
1194         bond->params.fail_over_mac = newval->value;
1195
1196         return 0;
1197 }
1198
1199 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1200                                             const struct bond_opt_value *newval)
1201 {
1202         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1203                    newval->string, newval->value);
1204         bond->params.xmit_policy = newval->value;
1205
1206         return 0;
1207 }
1208
1209 static int bond_option_resend_igmp_set(struct bonding *bond,
1210                                        const struct bond_opt_value *newval)
1211 {
1212         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1213                    newval->value);
1214         bond->params.resend_igmp = newval->value;
1215
1216         return 0;
1217 }
1218
1219 static int bond_option_num_peer_notif_set(struct bonding *bond,
1220                                    const struct bond_opt_value *newval)
1221 {
1222         bond->params.num_peer_notif = newval->value;
1223
1224         return 0;
1225 }
1226
1227 static int bond_option_all_slaves_active_set(struct bonding *bond,
1228                                              const struct bond_opt_value *newval)
1229 {
1230         struct list_head *iter;
1231         struct slave *slave;
1232
1233         if (newval->value == bond->params.all_slaves_active)
1234                 return 0;
1235         bond->params.all_slaves_active = newval->value;
1236         bond_for_each_slave(bond, slave, iter) {
1237                 if (!bond_is_active_slave(slave)) {
1238                         if (newval->value)
1239                                 slave->inactive = 0;
1240                         else
1241                                 slave->inactive = 1;
1242                 }
1243         }
1244
1245         return 0;
1246 }
1247
1248 static int bond_option_min_links_set(struct bonding *bond,
1249                                      const struct bond_opt_value *newval)
1250 {
1251         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1252                    newval->value);
1253         bond->params.min_links = newval->value;
1254         bond_set_carrier(bond);
1255
1256         return 0;
1257 }
1258
1259 static int bond_option_lp_interval_set(struct bonding *bond,
1260                                        const struct bond_opt_value *newval)
1261 {
1262         bond->params.lp_interval = newval->value;
1263
1264         return 0;
1265 }
1266
1267 static int bond_option_pps_set(struct bonding *bond,
1268                                const struct bond_opt_value *newval)
1269 {
1270         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1271                    newval->value);
1272         bond->params.packets_per_slave = newval->value;
1273         if (newval->value > 0) {
1274                 bond->params.reciprocal_packets_per_slave =
1275                         reciprocal_value(newval->value);
1276         } else {
1277                 /* reciprocal_packets_per_slave is unused if
1278                  * packets_per_slave is 0 or 1, just initialize it
1279                  */
1280                 bond->params.reciprocal_packets_per_slave =
1281                         (struct reciprocal_value) { 0 };
1282         }
1283
1284         return 0;
1285 }
1286
1287 static int bond_option_lacp_rate_set(struct bonding *bond,
1288                                      const struct bond_opt_value *newval)
1289 {
1290         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1291                    newval->string, newval->value);
1292         bond->params.lacp_fast = newval->value;
1293         bond_3ad_update_lacp_rate(bond);
1294
1295         return 0;
1296 }
1297
1298 static int bond_option_ad_select_set(struct bonding *bond,
1299                                      const struct bond_opt_value *newval)
1300 {
1301         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1302                    newval->string, newval->value);
1303         bond->params.ad_select = newval->value;
1304
1305         return 0;
1306 }
1307
1308 static int bond_option_queue_id_set(struct bonding *bond,
1309                                     const struct bond_opt_value *newval)
1310 {
1311         struct slave *slave, *update_slave;
1312         struct net_device *sdev;
1313         struct list_head *iter;
1314         char *delim;
1315         int ret = 0;
1316         u16 qid;
1317
1318         /* delim will point to queue id if successful */
1319         delim = strchr(newval->string, ':');
1320         if (!delim)
1321                 goto err_no_cmd;
1322
1323         /* Terminate string that points to device name and bump it
1324          * up one, so we can read the queue id there.
1325          */
1326         *delim = '\0';
1327         if (sscanf(++delim, "%hd\n", &qid) != 1)
1328                 goto err_no_cmd;
1329
1330         /* Check buffer length, valid ifname and queue id */
1331         if (!dev_valid_name(newval->string) ||
1332             qid > bond->dev->real_num_tx_queues)
1333                 goto err_no_cmd;
1334
1335         /* Get the pointer to that interface if it exists */
1336         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1337         if (!sdev)
1338                 goto err_no_cmd;
1339
1340         /* Search for thes slave and check for duplicate qids */
1341         update_slave = NULL;
1342         bond_for_each_slave(bond, slave, iter) {
1343                 if (sdev == slave->dev)
1344                         /* We don't need to check the matching
1345                          * slave for dups, since we're overwriting it
1346                          */
1347                         update_slave = slave;
1348                 else if (qid && qid == slave->queue_id) {
1349                         goto err_no_cmd;
1350                 }
1351         }
1352
1353         if (!update_slave)
1354                 goto err_no_cmd;
1355
1356         /* Actually set the qids for the slave */
1357         update_slave->queue_id = qid;
1358
1359 out:
1360         return ret;
1361
1362 err_no_cmd:
1363         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1364         ret = -EPERM;
1365         goto out;
1366
1367 }
1368
1369 static int bond_option_slaves_set(struct bonding *bond,
1370                                   const struct bond_opt_value *newval)
1371 {
1372         char command[IFNAMSIZ + 1] = { 0, };
1373         struct net_device *dev;
1374         char *ifname;
1375         int ret;
1376
1377         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1378         ifname = command + 1;
1379         if ((strlen(command) <= 1) ||
1380             (command[0] != '+' && command[0] != '-') ||
1381             !dev_valid_name(ifname))
1382                 goto err_no_cmd;
1383
1384         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1385         if (!dev) {
1386                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1387                            ifname);
1388                 ret = -ENODEV;
1389                 goto out;
1390         }
1391
1392         switch (command[0]) {
1393         case '+':
1394                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1395                 ret = bond_enslave(bond->dev, dev, NULL);
1396                 break;
1397
1398         case '-':
1399                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1400                 ret = bond_release(bond->dev, dev);
1401                 break;
1402
1403         default:
1404                 /* should not run here. */
1405                 goto err_no_cmd;
1406         }
1407
1408 out:
1409         return ret;
1410
1411 err_no_cmd:
1412         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1413         ret = -EPERM;
1414         goto out;
1415 }
1416
1417 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1418                                           const struct bond_opt_value *newval)
1419 {
1420         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1421                    newval->string, newval->value);
1422         bond->params.tlb_dynamic_lb = newval->value;
1423
1424         return 0;
1425 }
1426
1427 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1428                                              const struct bond_opt_value *newval)
1429 {
1430         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1431                    newval->value);
1432
1433         bond->params.ad_actor_sys_prio = newval->value;
1434         bond_3ad_update_ad_actor_settings(bond);
1435
1436         return 0;
1437 }
1438
1439 static int bond_option_ad_actor_system_set(struct bonding *bond,
1440                                            const struct bond_opt_value *newval)
1441 {
1442         u8 macaddr[ETH_ALEN];
1443         u8 *mac;
1444
1445         if (newval->string) {
1446                 if (!mac_pton(newval->string, macaddr))
1447                         goto err;
1448                 mac = macaddr;
1449         } else {
1450                 mac = (u8 *)&newval->value;
1451         }
1452
1453         if (!is_valid_ether_addr(mac))
1454                 goto err;
1455
1456         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1457         ether_addr_copy(bond->params.ad_actor_system, mac);
1458         bond_3ad_update_ad_actor_settings(bond);
1459
1460         return 0;
1461
1462 err:
1463         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1464         return -EINVAL;
1465 }
1466
1467 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1468                                             const struct bond_opt_value *newval)
1469 {
1470         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1471                    newval->value);
1472
1473         bond->params.ad_user_port_key = newval->value;
1474         return 0;
1475 }