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_ns_ip6_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_active_set(struct bonding *bond,
  64                                        const struct bond_opt_value *newval);
  65 static int bond_option_lacp_rate_set(struct bonding *bond,
  66                                      const struct bond_opt_value *newval);
  67 static int bond_option_ad_select_set(struct bonding *bond,
  68                                      const struct bond_opt_value *newval);
  69 static int bond_option_queue_id_set(struct bonding *bond,
  70                                     const struct bond_opt_value *newval);
  71 static int bond_option_mode_set(struct bonding *bond,
  72                                 const struct bond_opt_value *newval);
  73 static int bond_option_slaves_set(struct bonding *bond,
  74                                   const struct bond_opt_value *newval);
  75 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  76                                   const struct bond_opt_value *newval);
  77 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  78                                              const struct bond_opt_value *newval);
  79 static int bond_option_ad_actor_system_set(struct bonding *bond,
  80                                            const struct bond_opt_value *newval);
  81 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  82                                             const struct bond_opt_value *newval);
  83 static int bond_option_missed_max_set(struct bonding *bond,
  84                                       const struct bond_opt_value *newval);
  85
  86
  87 static const struct bond_opt_value bond_mode_tbl[] = {
  88         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  89         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  90         { "balance-xor",   BOND_MODE_XOR,          0},
  91         { "broadcast",     BOND_MODE_BROADCAST,    0},
  92         { "802.3ad",       BOND_MODE_8023AD,       0},
  93         { "balance-tlb",   BOND_MODE_TLB,          0},
  94         { "balance-alb",   BOND_MODE_ALB,          0},
  95         { NULL,            -1,                     0},
  96 };
  97
  98 static const struct bond_opt_value bond_pps_tbl[] = {
  99         { "default", 1,         BOND_VALFLAG_DEFAULT},
 100         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
 101         { NULL,      -1,        0},
 102 };
 103
 104 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
 105         { "layer2",      BOND_XMIT_POLICY_LAYER2,      BOND_VALFLAG_DEFAULT},
 106         { "layer3+4",    BOND_XMIT_POLICY_LAYER34,     0},
 107         { "layer2+3",    BOND_XMIT_POLICY_LAYER23,     0},
 108         { "encap2+3",    BOND_XMIT_POLICY_ENCAP23,     0},
 109         { "encap3+4",    BOND_XMIT_POLICY_ENCAP34,     0},
 110         { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
 111         { NULL,          -1,                           0},
 112 };
 113
 114 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 115         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 116         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 117         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 118         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 119         { "filter",             BOND_ARP_FILTER,                0},
 120         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 121         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 122         { NULL,                 -1,                             0},
 123 };
 124
 125 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 126         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 127         { "all", BOND_ARP_TARGETS_ALL, 0},
 128         { NULL,  -1,                   0},
 129 };
 130
 131 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 132         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 133         { "active", BOND_FOM_ACTIVE, 0},
 134         { "follow", BOND_FOM_FOLLOW, 0},
 135         { NULL,     -1,              0},
 136 };
 137
 138 static const struct bond_opt_value bond_intmax_tbl[] = {
 139         { "off",     0,       BOND_VALFLAG_DEFAULT},
 140         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 141         { NULL,      -1,      0}
 142 };
 143
 144 static const struct bond_opt_value bond_lacp_active[] = {
 145         { "off", 0,  0},
 146         { "on",  1,  BOND_VALFLAG_DEFAULT},
 147         { NULL,  -1, 0}
 148 };
 149
 150 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 151         { "slow", AD_LACP_SLOW, 0},
 152         { "fast", AD_LACP_FAST, 0},
 153         { NULL,   -1,           0},
 154 };
 155
 156 static const struct bond_opt_value bond_ad_select_tbl[] = {
 157         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 158         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 159         { "count",     BOND_AD_COUNT,     0},
 160         { NULL,        -1,                0},
 161 };
 162
 163 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 164         { "off",     0,   0},
 165         { "maxval",  255, BOND_VALFLAG_MAX},
 166         { "default", 1,   BOND_VALFLAG_DEFAULT},
 167         { NULL,      -1,  0}
 168 };
 169
 170 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 171         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 172         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 173         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 174         { NULL,      -1},
 175 };
 176
 177 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 178         { "off", 0,  0},
 179         { "on",  1,  BOND_VALFLAG_DEFAULT},
 180         { NULL,  -1, 0}
 181 };
 182
 183 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 184         { "off", 0,  BOND_VALFLAG_DEFAULT},
 185         { "on",  1,  0},
 186         { NULL,  -1, 0}
 187 };
 188
 189 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 190         { "off",     0,   0},
 191         { "maxval",  255, BOND_VALFLAG_MAX},
 192         { "default", 1,   BOND_VALFLAG_DEFAULT},
 193         { NULL,      -1,  0}
 194 };
 195
 196 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 197         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 198         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 199         { NULL,      -1,      0},
 200 };
 201
 202 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 203         { "off", 0,  0},
 204         { "on",  1,  BOND_VALFLAG_DEFAULT},
 205         { NULL,  -1, 0}
 206 };
 207
 208 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 209         { "minval",  1,     BOND_VALFLAG_MIN},
 210         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 211         { NULL,      -1,    0},
 212 };
 213
 214 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 215         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 216         { "maxval",  1023,  BOND_VALFLAG_MAX},
 217         { NULL,      -1,    0},
 218 };
 219
 220 static const struct bond_opt_value bond_missed_max_tbl[] = {
 221         { "minval",     1,      BOND_VALFLAG_MIN},
 222         { "maxval",     255,    BOND_VALFLAG_MAX},
 223         { "default",    2,      BOND_VALFLAG_DEFAULT},
 224         { NULL,         -1,     0},
 225 };
 226
 227 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 228         [BOND_OPT_MODE] = {
 229                 .id = BOND_OPT_MODE,
 230                 .name = "mode",
 231                 .desc = "bond device mode",
 232                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 233                 .values = bond_mode_tbl,
 234                 .set = bond_option_mode_set
 235         },
 236         [BOND_OPT_PACKETS_PER_SLAVE] = {
 237                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 238                 .name = "packets_per_slave",
 239                 .desc = "Packets to send per slave in RR mode",
 240                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 241                 .values = bond_pps_tbl,
 242                 .set = bond_option_pps_set
 243         },
 244         [BOND_OPT_XMIT_HASH] = {
 245                 .id = BOND_OPT_XMIT_HASH,
 246                 .name = "xmit_hash_policy",
 247                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 248                 .values = bond_xmit_hashtype_tbl,
 249                 .set = bond_option_xmit_hash_policy_set
 250         },
 251         [BOND_OPT_ARP_VALIDATE] = {
 252                 .id = BOND_OPT_ARP_VALIDATE,
 253                 .name = "arp_validate",
 254                 .desc = "validate src/dst of ARP probes",
 255                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 256                                BIT(BOND_MODE_ALB),
 257                 .values = bond_arp_validate_tbl,
 258                 .set = bond_option_arp_validate_set
 259         },
 260         [BOND_OPT_ARP_ALL_TARGETS] = {
 261                 .id = BOND_OPT_ARP_ALL_TARGETS,
 262                 .name = "arp_all_targets",
 263                 .desc = "fail on any/all arp targets timeout",
 264                 .values = bond_arp_all_targets_tbl,
 265                 .set = bond_option_arp_all_targets_set
 266         },
 267         [BOND_OPT_FAIL_OVER_MAC] = {
 268                 .id = BOND_OPT_FAIL_OVER_MAC,
 269                 .name = "fail_over_mac",
 270                 .desc = "For active-backup, do not set all slaves to the same MAC",
 271                 .flags = BOND_OPTFLAG_NOSLAVES,
 272                 .values = bond_fail_over_mac_tbl,
 273                 .set = bond_option_fail_over_mac_set
 274         },
 275         [BOND_OPT_ARP_INTERVAL] = {
 276                 .id = BOND_OPT_ARP_INTERVAL,
 277                 .name = "arp_interval",
 278                 .desc = "arp interval in milliseconds",
 279                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 280                                BIT(BOND_MODE_ALB),
 281                 .values = bond_intmax_tbl,
 282                 .set = bond_option_arp_interval_set
 283         },
 284         [BOND_OPT_MISSED_MAX] = {
 285                 .id = BOND_OPT_MISSED_MAX,
 286                 .name = "arp_missed_max",
 287                 .desc = "Maximum number of missed ARP interval",
 288                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 289                                BIT(BOND_MODE_ALB),
 290                 .values = bond_missed_max_tbl,
 291                 .set = bond_option_missed_max_set
 292         },
 293         [BOND_OPT_ARP_TARGETS] = {
 294                 .id = BOND_OPT_ARP_TARGETS,
 295                 .name = "arp_ip_target",
 296                 .desc = "arp targets in n.n.n.n form",
 297                 .flags = BOND_OPTFLAG_RAWVAL,
 298                 .set = bond_option_arp_ip_targets_set
 299         },
 300         [BOND_OPT_NS_TARGETS] = {
 301                 .id = BOND_OPT_NS_TARGETS,
 302                 .name = "ns_ip6_target",
 303                 .desc = "NS targets in ffff:ffff::ffff:ffff form",
 304                 .flags = BOND_OPTFLAG_RAWVAL,
 305                 .set = bond_option_ns_ip6_targets_set
 306         },
 307         [BOND_OPT_DOWNDELAY] = {
 308                 .id = BOND_OPT_DOWNDELAY,
 309                 .name = "downdelay",
 310                 .desc = "Delay before considering link down, in milliseconds",
 311                 .values = bond_intmax_tbl,
 312                 .set = bond_option_downdelay_set
 313         },
 314         [BOND_OPT_UPDELAY] = {
 315                 .id = BOND_OPT_UPDELAY,
 316                 .name = "updelay",
 317                 .desc = "Delay before considering link up, in milliseconds",
 318                 .values = bond_intmax_tbl,
 319                 .set = bond_option_updelay_set
 320         },
 321         [BOND_OPT_LACP_ACTIVE] = {
 322                 .id = BOND_OPT_LACP_ACTIVE,
 323                 .name = "lacp_active",
 324                 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
 325                 .flags = BOND_OPTFLAG_IFDOWN,
 326                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 327                 .values = bond_lacp_active,
 328                 .set = bond_option_lacp_active_set
 329         },
 330         [BOND_OPT_LACP_RATE] = {
 331                 .id = BOND_OPT_LACP_RATE,
 332                 .name = "lacp_rate",
 333                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 334                 .flags = BOND_OPTFLAG_IFDOWN,
 335                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 336                 .values = bond_lacp_rate_tbl,
 337                 .set = bond_option_lacp_rate_set
 338         },
 339         [BOND_OPT_MINLINKS] = {
 340                 .id = BOND_OPT_MINLINKS,
 341                 .name = "min_links",
 342                 .desc = "Minimum number of available links before turning on carrier",
 343                 .values = bond_intmax_tbl,
 344                 .set = bond_option_min_links_set
 345         },
 346         [BOND_OPT_AD_SELECT] = {
 347                 .id = BOND_OPT_AD_SELECT,
 348                 .name = "ad_select",
 349                 .desc = "803.ad aggregation selection logic",
 350                 .flags = BOND_OPTFLAG_IFDOWN,
 351                 .values = bond_ad_select_tbl,
 352                 .set = bond_option_ad_select_set
 353         },
 354         [BOND_OPT_NUM_PEER_NOTIF] = {
 355                 .id = BOND_OPT_NUM_PEER_NOTIF,
 356                 .name = "num_unsol_na",
 357                 .desc = "Number of peer notifications to send on failover event",
 358                 .values = bond_num_peer_notif_tbl,
 359                 .set = bond_option_num_peer_notif_set
 360         },
 361         [BOND_OPT_MIIMON] = {
 362                 .id = BOND_OPT_MIIMON,
 363                 .name = "miimon",
 364                 .desc = "Link check interval in milliseconds",
 365                 .values = bond_intmax_tbl,
 366                 .set = bond_option_miimon_set
 367         },
 368         [BOND_OPT_PRIMARY] = {
 369                 .id = BOND_OPT_PRIMARY,
 370                 .name = "primary",
 371                 .desc = "Primary network device to use",
 372                 .flags = BOND_OPTFLAG_RAWVAL,
 373                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 374                                                 BIT(BOND_MODE_TLB) |
 375                                                 BIT(BOND_MODE_ALB)),
 376                 .set = bond_option_primary_set
 377         },
 378         [BOND_OPT_PRIMARY_RESELECT] = {
 379                 .id = BOND_OPT_PRIMARY_RESELECT,
 380                 .name = "primary_reselect",
 381                 .desc = "Reselect primary slave once it comes up",
 382                 .values = bond_primary_reselect_tbl,
 383                 .set = bond_option_primary_reselect_set
 384         },
 385         [BOND_OPT_USE_CARRIER] = {
 386                 .id = BOND_OPT_USE_CARRIER,
 387                 .name = "use_carrier",
 388                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 389                 .values = bond_use_carrier_tbl,
 390                 .set = bond_option_use_carrier_set
 391         },
 392         [BOND_OPT_ACTIVE_SLAVE] = {
 393                 .id = BOND_OPT_ACTIVE_SLAVE,
 394                 .name = "active_slave",
 395                 .desc = "Currently active slave",
 396                 .flags = BOND_OPTFLAG_RAWVAL,
 397                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 398                                                 BIT(BOND_MODE_TLB) |
 399                                                 BIT(BOND_MODE_ALB)),
 400                 .set = bond_option_active_slave_set
 401         },
 402         [BOND_OPT_QUEUE_ID] = {
 403                 .id = BOND_OPT_QUEUE_ID,
 404                 .name = "queue_id",
 405                 .desc = "Set queue id of a slave",
 406                 .flags = BOND_OPTFLAG_RAWVAL,
 407                 .set = bond_option_queue_id_set
 408         },
 409         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 410                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 411                 .name = "all_slaves_active",
 412                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 413                 .values = bond_all_slaves_active_tbl,
 414                 .set = bond_option_all_slaves_active_set
 415         },
 416         [BOND_OPT_RESEND_IGMP] = {
 417                 .id = BOND_OPT_RESEND_IGMP,
 418                 .name = "resend_igmp",
 419                 .desc = "Number of IGMP membership reports to send on link failure",
 420                 .values = bond_resend_igmp_tbl,
 421                 .set = bond_option_resend_igmp_set
 422         },
 423         [BOND_OPT_LP_INTERVAL] = {
 424                 .id = BOND_OPT_LP_INTERVAL,
 425                 .name = "lp_interval",
 426                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 427                 .values = bond_lp_interval_tbl,
 428                 .set = bond_option_lp_interval_set
 429         },
 430         [BOND_OPT_SLAVES] = {
 431                 .id = BOND_OPT_SLAVES,
 432                 .name = "slaves",
 433                 .desc = "Slave membership management",
 434                 .flags = BOND_OPTFLAG_RAWVAL,
 435                 .set = bond_option_slaves_set
 436         },
 437         [BOND_OPT_TLB_DYNAMIC_LB] = {
 438                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 439                 .name = "tlb_dynamic_lb",
 440                 .desc = "Enable dynamic flow shuffling",
 441                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
 442                 .values = bond_tlb_dynamic_lb_tbl,
 443                 .flags = BOND_OPTFLAG_IFDOWN,
 444                 .set = bond_option_tlb_dynamic_lb_set,
 445         },
 446         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 447                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 448                 .name = "ad_actor_sys_prio",
 449                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 450                 .values = bond_ad_actor_sys_prio_tbl,
 451                 .set = bond_option_ad_actor_sys_prio_set,
 452         },
 453         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 454                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 455                 .name = "ad_actor_system",
 456                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 457                 .flags = BOND_OPTFLAG_RAWVAL,
 458                 .set = bond_option_ad_actor_system_set,
 459         },
 460         [BOND_OPT_AD_USER_PORT_KEY] = {
 461                 .id = BOND_OPT_AD_USER_PORT_KEY,
 462                 .name = "ad_user_port_key",
 463                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 464                 .flags = BOND_OPTFLAG_IFDOWN,
 465                 .values = bond_ad_user_port_key_tbl,
 466                 .set = bond_option_ad_user_port_key_set,
 467         },
 468         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 469                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 470                 .name = "num_grat_arp",
 471                 .desc = "Number of peer notifications to send on failover event",
 472                 .values = bond_num_peer_notif_tbl,
 473                 .set = bond_option_num_peer_notif_set
 474         },
 475         [BOND_OPT_PEER_NOTIF_DELAY] = {
 476                 .id = BOND_OPT_PEER_NOTIF_DELAY,
 477                 .name = "peer_notif_delay",
 478                 .desc = "Delay between each peer notification on failover event, in milliseconds",
 479                 .values = bond_intmax_tbl,
 480                 .set = bond_option_peer_notif_delay_set
 481         }
 482 };
 483
 484 /* Searches for an option by name */
 485 const struct bond_option *bond_opt_get_by_name(const char *name)
 486 {
 487         const struct bond_option *opt;
 488         int option;
 489
 490         for (option = 0; option < BOND_OPT_LAST; option++) {
 491                 opt = bond_opt_get(option);
 492                 if (opt && !strcmp(opt->name, name))
 493                         return opt;
 494         }
 495
 496         return NULL;
 497 }
 498
 499 /* Searches for a value in opt's values[] table */
 500 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 501 {
 502         const struct bond_option *opt;
 503         int i;
 504
 505         opt = bond_opt_get(option);
 506         if (WARN_ON(!opt))
 507                 return NULL;
 508         for (i = 0; opt->values && opt->values[i].string; i++)
 509                 if (opt->values[i].value == val)
 510                         return &opt->values[i];
 511
 512         return NULL;
 513 }
 514
 515 /* Searches for a value in opt's values[] table which matches the flagmask */
 516 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 517                                                        u32 flagmask)
 518 {
 519         int i;
 520
 521         for (i = 0; opt->values && opt->values[i].string; i++)
 522                 if (opt->values[i].flags & flagmask)
 523                         return &opt->values[i];
 524
 525         return NULL;
 526 }
 527
 528 /* If maxval is missing then there's no range to check. In case minval is
 529  * missing then it's considered to be 0.
 530  */
 531 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 532 {
 533         const struct bond_opt_value *minval, *maxval;
 534
 535         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 536         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 537         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 538                 return false;
 539
 540         return true;
 541 }
 542
 543 /**
 544  * bond_opt_parse - parse option value
 545  * @opt: the option to parse against
 546  * @val: value to parse
 547  *
 548  * This function tries to extract the value from @val and check if it's
 549  * a possible match for the option and returns NULL if a match isn't found,
 550  * or the struct_opt_value that matched. It also strips the new line from
 551  * @val->string if it's present.
 552  */
 553 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 554                                             struct bond_opt_value *val)
 555 {
 556         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 557         const struct bond_opt_value *tbl;
 558         const struct bond_opt_value *ret = NULL;
 559         bool checkval;
 560         int i, rv;
 561
 562         /* No parsing if the option wants a raw val */
 563         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 564                 return val;
 565
 566         tbl = opt->values;
 567         if (!tbl)
 568                 goto out;
 569
 570         /* ULLONG_MAX is used to bypass string processing */
 571         checkval = val->value != ULLONG_MAX;
 572         if (!checkval) {
 573                 if (!val->string)
 574                         goto out;
 575                 p = strchr(val->string, '\n');
 576                 if (p)
 577                         *p = '\0';
 578                 for (p = val->string; *p; p++)
 579                         if (!(isdigit(*p) || isspace(*p)))
 580                                 break;
 581                 /* The following code extracts the string to match or the value
 582                  * and sets checkval appropriately
 583                  */
 584                 if (*p) {
 585                         rv = sscanf(val->string, "%32s", valstr);
 586                 } else {
 587                         rv = sscanf(val->string, "%llu", &val->value);
 588                         checkval = true;
 589                 }
 590                 if (!rv)
 591                         goto out;
 592         }
 593
 594         for (i = 0; tbl[i].string; i++) {
 595                 /* Check for exact match */
 596                 if (checkval) {
 597                         if (val->value == tbl[i].value)
 598                                 ret = &tbl[i];
 599                 } else {
 600                         if (!strcmp(valstr, "default") &&
 601                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 602                                 ret = &tbl[i];
 603
 604                         if (!strcmp(valstr, tbl[i].string))
 605                                 ret = &tbl[i];
 606                 }
 607                 /* Found an exact match */
 608                 if (ret)
 609                         goto out;
 610         }
 611         /* Possible range match */
 612         if (checkval && bond_opt_check_range(opt, val->value))
 613                 ret = val;
 614 out:
 615         return ret;
 616 }
 617
 618 /* Check opt's dependencies against bond mode and currently set options */
 619 static int bond_opt_check_deps(struct bonding *bond,
 620                                const struct bond_option *opt)
 621 {
 622         struct bond_params *params = &bond->params;
 623
 624         if (test_bit(params->mode, &opt->unsuppmodes))
 625                 return -EACCES;
 626         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 627                 return -ENOTEMPTY;
 628         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 629                 return -EBUSY;
 630
 631         return 0;
 632 }
 633
 634 static void bond_opt_dep_print(struct bonding *bond,
 635                                const struct bond_option *opt)
 636 {
 637         const struct bond_opt_value *modeval;
 638         struct bond_params *params;
 639
 640         params = &bond->params;
 641         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 642         if (test_bit(params->mode, &opt->unsuppmodes))
 643                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 644                            opt->name, modeval->string, modeval->value);
 645 }
 646
 647 static void bond_opt_error_interpret(struct bonding *bond,
 648                                      const struct bond_option *opt,
 649                                      int error, const struct bond_opt_value *val)
 650 {
 651         const struct bond_opt_value *minval, *maxval;
 652         char *p;
 653
 654         switch (error) {
 655         case -EINVAL:
 656                 if (val) {
 657                         if (val->string) {
 658                                 /* sometimes RAWVAL opts may have new lines */
 659                                 p = strchr(val->string, '\n');
 660                                 if (p)
 661                                         *p = '\0';
 662                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 663                                            opt->name, val->string);
 664                         } else {
 665                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 666                                            opt->name, val->value);
 667                         }
 668                 }
 669                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 670                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 671                 if (!maxval)
 672                         break;
 673                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 674                            opt->name, minval ? minval->value : 0, maxval->value);
 675                 break;
 676         case -EACCES:
 677                 bond_opt_dep_print(bond, opt);
 678                 break;
 679         case -ENOTEMPTY:
 680                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 681                            opt->name);
 682                 break;
 683         case -EBUSY:
 684                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 685                            opt->name);
 686                 break;
 687         case -ENODEV:
 688                 if (val && val->string) {
 689                         p = strchr(val->string, '\n');
 690                         if (p)
 691                                 *p = '\0';
 692                         netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
 693                                    opt->name, val->string);
 694                 }
 695                 break;
 696         default:
 697                 break;
 698         }
 699 }
 700
 701 /**
 702  * __bond_opt_set - set a bonding option
 703  * @bond: target bond device
 704  * @option: option to set
 705  * @val: value to set it to
 706  *
 707  * This function is used to change the bond's option value, it can be
 708  * used for both enabling/changing an option and for disabling it. RTNL lock
 709  * must be obtained before calling this function.
 710  */
 711 int __bond_opt_set(struct bonding *bond,
 712                    unsigned int option, struct bond_opt_value *val)
 713 {
 714         const struct bond_opt_value *retval = NULL;
 715         const struct bond_option *opt;
 716         int ret = -ENOENT;
 717
 718         ASSERT_RTNL();
 719
 720         opt = bond_opt_get(option);
 721         if (WARN_ON(!val) || WARN_ON(!opt))
 722                 goto out;
 723         ret = bond_opt_check_deps(bond, opt);
 724         if (ret)
 725                 goto out;
 726         retval = bond_opt_parse(opt, val);
 727         if (!retval) {
 728                 ret = -EINVAL;
 729                 goto out;
 730         }
 731         ret = opt->set(bond, retval);
 732 out:
 733         if (ret)
 734                 bond_opt_error_interpret(bond, opt, ret, val);
 735
 736         return ret;
 737 }
 738 /**
 739  * __bond_opt_set_notify - set a bonding option
 740  * @bond: target bond device
 741  * @option: option to set
 742  * @val: value to set it to
 743  *
 744  * This function is used to change the bond's option value and trigger
 745  * a notification to user sapce. It can be used for both enabling/changing
 746  * an option and for disabling it. RTNL lock must be obtained before calling
 747  * this function.
 748  */
 749 int __bond_opt_set_notify(struct bonding *bond,
 750                           unsigned int option, struct bond_opt_value *val)
 751 {
 752         int ret;
 753
 754         ASSERT_RTNL();
 755
 756         ret = __bond_opt_set(bond, option, val);
 757
 758         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 759                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 760
 761         return ret;
 762 }
 763
 764 /**
 765  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 766  * @bond: target bond device
 767  * @option: option to set
 768  * @buf: value to set it to
 769  *
 770  * This function tries to acquire RTNL without blocking and if successful
 771  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 772  */
 773 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 774 {
 775         struct bond_opt_value optval;
 776         int ret;
 777
 778         if (!rtnl_trylock())
 779                 return restart_syscall();
 780         bond_opt_initstr(&optval, buf);
 781         ret = __bond_opt_set_notify(bond, option, &optval);
 782         rtnl_unlock();
 783
 784         return ret;
 785 }
 786
 787 /**
 788  * bond_opt_get - get a pointer to an option
 789  * @option: option for which to return a pointer
 790  *
 791  * This function checks if option is valid and if so returns a pointer
 792  * to its entry in the bond_opts[] option array.
 793  */
 794 const struct bond_option *bond_opt_get(unsigned int option)
 795 {
 796         if (!BOND_OPT_VALID(option))
 797                 return NULL;
 798
 799         return &bond_opts[option];
 800 }
 801
 802 static bool bond_set_xfrm_features(struct bonding *bond)
 803 {
 804         if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
 805                 return false;
 806
 807         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
 808                 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
 809         else
 810                 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
 811
 812         return true;
 813 }
 814
 815 static bool bond_set_tls_features(struct bonding *bond)
 816 {
 817         if (!IS_ENABLED(CONFIG_TLS_DEVICE))
 818                 return false;
 819
 820         if (bond_sk_check(bond))
 821                 bond->dev->wanted_features |= BOND_TLS_FEATURES;
 822         else
 823                 bond->dev->wanted_features &= ~BOND_TLS_FEATURES;
 824
 825         return true;
 826 }
 827
 828 static int bond_option_mode_set(struct bonding *bond,
 829                                 const struct bond_opt_value *newval)
 830 {
 831         if (!bond_mode_uses_arp(newval->value)) {
 832                 if (bond->params.arp_interval) {
 833                         netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 834                                    newval->string);
 835                         /* disable arp monitoring */
 836                         bond->params.arp_interval = 0;
 837                 }
 838
 839                 if (!bond->params.miimon) {
 840                         /* set miimon to default value */
 841                         bond->params.miimon = BOND_DEFAULT_MIIMON;
 842                         netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 843                                    bond->params.miimon);
 844                 }
 845         }
 846
 847         if (newval->value == BOND_MODE_ALB)
 848                 bond->params.tlb_dynamic_lb = 1;
 849
 850         /* don't cache arp_validate between modes */
 851         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 852         bond->params.mode = newval->value;
 853
 854         if (bond->dev->reg_state == NETREG_REGISTERED) {
 855                 bool update = false;
 856
 857                 update |= bond_set_xfrm_features(bond);
 858                 update |= bond_set_tls_features(bond);
 859
 860                 if (update)
 861                         netdev_update_features(bond->dev);
 862         }
 863
 864         return 0;
 865 }
 866
 867 static int bond_option_active_slave_set(struct bonding *bond,
 868                                         const struct bond_opt_value *newval)
 869 {
 870         char ifname[IFNAMSIZ] = { 0, };
 871         struct net_device *slave_dev;
 872         int ret = 0;
 873
 874         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 875         if (!strlen(ifname) || newval->string[0] == '\n') {
 876                 slave_dev = NULL;
 877         } else {
 878                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 879                 if (!slave_dev)
 880                         return -ENODEV;
 881         }
 882
 883         if (slave_dev) {
 884                 if (!netif_is_bond_slave(slave_dev)) {
 885                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 886                         return -EINVAL;
 887                 }
 888
 889                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 890                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 891                         return -EINVAL;
 892                 }
 893         }
 894
 895         block_netpoll_tx();
 896         /* check to see if we are clearing active */
 897         if (!slave_dev) {
 898                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 899                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 900                 bond_select_active_slave(bond);
 901         } else {
 902                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 903                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 904
 905                 BUG_ON(!new_active);
 906
 907                 if (new_active == old_active) {
 908                         /* do nothing */
 909                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 910                 } else {
 911                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 912                             bond_slave_is_up(new_active)) {
 913                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 914                                 bond_change_active_slave(bond, new_active);
 915                         } else {
 916                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 917                                           new_active->dev->name);
 918                                 ret = -EINVAL;
 919                         }
 920                 }
 921         }
 922         unblock_netpoll_tx();
 923
 924         return ret;
 925 }
 926
 927 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 928  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 929  * start it.
 930  */
 931 static int bond_option_miimon_set(struct bonding *bond,
 932                                   const struct bond_opt_value *newval)
 933 {
 934         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 935                    newval->value);
 936         bond->params.miimon = newval->value;
 937         if (bond->params.updelay)
 938                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 939                            bond->params.updelay * bond->params.miimon);
 940         if (bond->params.downdelay)
 941                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 942                            bond->params.downdelay * bond->params.miimon);
 943         if (bond->params.peer_notif_delay)
 944                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 945                            bond->params.peer_notif_delay * bond->params.miimon);
 946         if (newval->value && bond->params.arp_interval) {
 947                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 948                 bond->params.arp_interval = 0;
 949                 if (bond->params.arp_validate)
 950                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 951         }
 952         if (bond->dev->flags & IFF_UP) {
 953                 /* If the interface is up, we may need to fire off
 954                  * the MII timer. If the interface is down, the
 955                  * timer will get fired off when the open function
 956                  * is called.
 957                  */
 958                 if (!newval->value) {
 959                         cancel_delayed_work_sync(&bond->mii_work);
 960                 } else {
 961                         cancel_delayed_work_sync(&bond->arp_work);
 962                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 963                 }
 964         }
 965
 966         return 0;
 967 }
 968
 969 /* Set up, down and peer notification delays. These must be multiples
 970  * of the MII monitoring value, and are stored internally as the
 971  * multiplier. Thus, we must translate to MS for the real world.
 972  */
 973 static int _bond_option_delay_set(struct bonding *bond,
 974                                   const struct bond_opt_value *newval,
 975                                   const char *name,
 976                                   int *target)
 977 {
 978         int value = newval->value;
 979
 980         if (!bond->params.miimon) {
 981                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
 982                            name);
 983                 return -EPERM;
 984         }
 985         if ((value % bond->params.miimon) != 0) {
 986                 netdev_warn(bond->dev,
 987                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
 988                             name,
 989                             value, bond->params.miimon,
 990                             (value / bond->params.miimon) *
 991                             bond->params.miimon);
 992         }
 993         *target = value / bond->params.miimon;
 994         netdev_dbg(bond->dev, "Setting %s to %d\n",
 995                    name,
 996                    *target * bond->params.miimon);
 997
 998         return 0;
 999 }
1000
1001 static int bond_option_updelay_set(struct bonding *bond,
1002                                    const struct bond_opt_value *newval)
1003 {
1004         return _bond_option_delay_set(bond, newval, "up delay",
1005                                       &bond->params.updelay);
1006 }
1007
1008 static int bond_option_downdelay_set(struct bonding *bond,
1009                                      const struct bond_opt_value *newval)
1010 {
1011         return _bond_option_delay_set(bond, newval, "down delay",
1012                                       &bond->params.downdelay);
1013 }
1014
1015 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1016                                             const struct bond_opt_value *newval)
1017 {
1018         int ret = _bond_option_delay_set(bond, newval,
1019                                          "peer notification delay",
1020                                          &bond->params.peer_notif_delay);
1021         return ret;
1022 }
1023
1024 static int bond_option_use_carrier_set(struct bonding *bond,
1025                                        const struct bond_opt_value *newval)
1026 {
1027         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1028                    newval->value);
1029         bond->params.use_carrier = newval->value;
1030
1031         return 0;
1032 }
1033
1034 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
1035  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
1036  * we must start it.
1037  */
1038 static int bond_option_arp_interval_set(struct bonding *bond,
1039                                         const struct bond_opt_value *newval)
1040 {
1041         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1042                    newval->value);
1043         bond->params.arp_interval = newval->value;
1044         if (newval->value) {
1045                 if (bond->params.miimon) {
1046                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1047                         bond->params.miimon = 0;
1048                 }
1049                 if (!bond->params.arp_targets[0])
1050                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1051         }
1052         if (bond->dev->flags & IFF_UP) {
1053                 /* If the interface is up, we may need to fire off
1054                  * the ARP timer.  If the interface is down, the
1055                  * timer will get fired off when the open function
1056                  * is called.
1057                  */
1058                 if (!newval->value) {
1059                         if (bond->params.arp_validate)
1060                                 bond->recv_probe = NULL;
1061                         cancel_delayed_work_sync(&bond->arp_work);
1062                 } else {
1063                         /* arp_validate can be set only in active-backup mode */
1064                         bond->recv_probe = bond_rcv_validate;
1065                         cancel_delayed_work_sync(&bond->mii_work);
1066                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
1067                 }
1068         }
1069
1070         return 0;
1071 }
1072
1073 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1074                                             __be32 target,
1075                                             unsigned long last_rx)
1076 {
1077         __be32 *targets = bond->params.arp_targets;
1078         struct list_head *iter;
1079         struct slave *slave;
1080
1081         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1082                 bond_for_each_slave(bond, slave, iter)
1083                         slave->target_last_arp_rx[slot] = last_rx;
1084                 targets[slot] = target;
1085         }
1086 }
1087
1088 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1089 {
1090         __be32 *targets = bond->params.arp_targets;
1091         int ind;
1092
1093         if (!bond_is_ip_target_ok(target)) {
1094                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1095                            &target);
1096                 return -EINVAL;
1097         }
1098
1099         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1100                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1101                            &target);
1102                 return -EINVAL;
1103         }
1104
1105         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1106         if (ind == -1) {
1107                 netdev_err(bond->dev, "ARP target table is full!\n");
1108                 return -EINVAL;
1109         }
1110
1111         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1112
1113         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1114
1115         return 0;
1116 }
1117
1118 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1119 {
1120         return _bond_option_arp_ip_target_add(bond, target);
1121 }
1122
1123 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1124 {
1125         __be32 *targets = bond->params.arp_targets;
1126         struct list_head *iter;
1127         struct slave *slave;
1128         unsigned long *targets_rx;
1129         int ind, i;
1130
1131         if (!bond_is_ip_target_ok(target)) {
1132                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1133                            &target);
1134                 return -EINVAL;
1135         }
1136
1137         ind = bond_get_targets_ip(targets, target);
1138         if (ind == -1) {
1139                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1140                            &target);
1141                 return -EINVAL;
1142         }
1143
1144         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1145                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1146
1147         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1148
1149         bond_for_each_slave(bond, slave, iter) {
1150                 targets_rx = slave->target_last_arp_rx;
1151                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1152                         targets_rx[i] = targets_rx[i+1];
1153                 targets_rx[i] = 0;
1154         }
1155         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1156                 targets[i] = targets[i+1];
1157         targets[i] = 0;
1158
1159         return 0;
1160 }
1161
1162 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1163 {
1164         int i;
1165
1166         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1167                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1168 }
1169
1170 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1171                                           const struct bond_opt_value *newval)
1172 {
1173         int ret = -EPERM;
1174         __be32 target;
1175
1176         if (newval->string) {
1177                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1178                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1179                                    &target);
1180                         return ret;
1181                 }
1182                 if (newval->string[0] == '+')
1183                         ret = bond_option_arp_ip_target_add(bond, target);
1184                 else if (newval->string[0] == '-')
1185                         ret = bond_option_arp_ip_target_rem(bond, target);
1186                 else
1187                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1188         } else {
1189                 target = newval->value;
1190                 ret = bond_option_arp_ip_target_add(bond, target);
1191         }
1192
1193         return ret;
1194 }
1195
1196 #if IS_ENABLED(CONFIG_IPV6)
1197 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1198                                             struct in6_addr *target,
1199                                             unsigned long last_rx)
1200 {
1201         struct in6_addr *targets = bond->params.ns_targets;
1202         struct list_head *iter;
1203         struct slave *slave;
1204
1205         if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1206                 bond_for_each_slave(bond, slave, iter)
1207                         slave->target_last_arp_rx[slot] = last_rx;
1208                 targets[slot] = *target;
1209         }
1210 }
1211
1212 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1213 {
1214         struct in6_addr addr_any = in6addr_any;
1215         int i;
1216
1217         for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1218                 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1219 }
1220
1221 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1222                                           const struct bond_opt_value *newval)
1223 {
1224         struct in6_addr *target = (struct in6_addr *)newval->extra;
1225         struct in6_addr *targets = bond->params.ns_targets;
1226         struct in6_addr addr_any = in6addr_any;
1227         int index;
1228
1229         if (!bond_is_ip6_target_ok(target)) {
1230                 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1231                            target);
1232                 return -EINVAL;
1233         }
1234
1235         if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1236                 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1237                            target);
1238                 return -EINVAL;
1239         }
1240
1241         index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1242         if (index == -1) {
1243                 netdev_err(bond->dev, "NS target table is full!\n");
1244                 return -EINVAL;
1245         }
1246
1247         netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1248
1249         _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1250
1251         return 0;
1252 }
1253 #else
1254 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1255                                           const struct bond_opt_value *newval)
1256 {
1257         return -EPERM;
1258 }
1259 #endif
1260
1261 static int bond_option_arp_validate_set(struct bonding *bond,
1262                                         const struct bond_opt_value *newval)
1263 {
1264         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1265                    newval->string, newval->value);
1266         bond->params.arp_validate = newval->value;
1267
1268         return 0;
1269 }
1270
1271 static int bond_option_arp_all_targets_set(struct bonding *bond,
1272                                            const struct bond_opt_value *newval)
1273 {
1274         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1275                    newval->string, newval->value);
1276         bond->params.arp_all_targets = newval->value;
1277
1278         return 0;
1279 }
1280
1281 static int bond_option_missed_max_set(struct bonding *bond,
1282                                       const struct bond_opt_value *newval)
1283 {
1284         netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1285                    newval->string, newval->value);
1286         bond->params.missed_max = newval->value;
1287
1288         return 0;
1289 }
1290
1291 static int bond_option_primary_set(struct bonding *bond,
1292                                    const struct bond_opt_value *newval)
1293 {
1294         char *p, *primary = newval->string;
1295         struct list_head *iter;
1296         struct slave *slave;
1297
1298         block_netpoll_tx();
1299
1300         p = strchr(primary, '\n');
1301         if (p)
1302                 *p = '\0';
1303         /* check to see if we are clearing primary */
1304         if (!strlen(primary)) {
1305                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1306                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1307                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1308                 bond_select_active_slave(bond);
1309                 goto out;
1310         }
1311
1312         bond_for_each_slave(bond, slave, iter) {
1313                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1314                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1315                         rcu_assign_pointer(bond->primary_slave, slave);
1316                         strcpy(bond->params.primary, slave->dev->name);
1317                         bond->force_primary = true;
1318                         bond_select_active_slave(bond);
1319                         goto out;
1320                 }
1321         }
1322
1323         if (rtnl_dereference(bond->primary_slave)) {
1324                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1325                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1326                 bond_select_active_slave(bond);
1327         }
1328         strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1329
1330         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1331                    primary);
1332
1333 out:
1334         unblock_netpoll_tx();
1335
1336         return 0;
1337 }
1338
1339 static int bond_option_primary_reselect_set(struct bonding *bond,
1340                                             const struct bond_opt_value *newval)
1341 {
1342         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1343                    newval->string, newval->value);
1344         bond->params.primary_reselect = newval->value;
1345
1346         block_netpoll_tx();
1347         bond_select_active_slave(bond);
1348         unblock_netpoll_tx();
1349
1350         return 0;
1351 }
1352
1353 static int bond_option_fail_over_mac_set(struct bonding *bond,
1354                                          const struct bond_opt_value *newval)
1355 {
1356         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1357                    newval->string, newval->value);
1358         bond->params.fail_over_mac = newval->value;
1359
1360         return 0;
1361 }
1362
1363 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1364                                             const struct bond_opt_value *newval)
1365 {
1366         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1367                    newval->string, newval->value);
1368         bond->params.xmit_policy = newval->value;
1369
1370         if (bond->dev->reg_state == NETREG_REGISTERED)
1371                 if (bond_set_tls_features(bond))
1372                         netdev_update_features(bond->dev);
1373
1374         return 0;
1375 }
1376
1377 static int bond_option_resend_igmp_set(struct bonding *bond,
1378                                        const struct bond_opt_value *newval)
1379 {
1380         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1381                    newval->value);
1382         bond->params.resend_igmp = newval->value;
1383
1384         return 0;
1385 }
1386
1387 static int bond_option_num_peer_notif_set(struct bonding *bond,
1388                                    const struct bond_opt_value *newval)
1389 {
1390         bond->params.num_peer_notif = newval->value;
1391
1392         return 0;
1393 }
1394
1395 static int bond_option_all_slaves_active_set(struct bonding *bond,
1396                                              const struct bond_opt_value *newval)
1397 {
1398         struct list_head *iter;
1399         struct slave *slave;
1400
1401         if (newval->value == bond->params.all_slaves_active)
1402                 return 0;
1403         bond->params.all_slaves_active = newval->value;
1404         bond_for_each_slave(bond, slave, iter) {
1405                 if (!bond_is_active_slave(slave)) {
1406                         if (newval->value)
1407                                 slave->inactive = 0;
1408                         else
1409                                 slave->inactive = 1;
1410                 }
1411         }
1412
1413         return 0;
1414 }
1415
1416 static int bond_option_min_links_set(struct bonding *bond,
1417                                      const struct bond_opt_value *newval)
1418 {
1419         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1420                    newval->value);
1421         bond->params.min_links = newval->value;
1422         bond_set_carrier(bond);
1423
1424         return 0;
1425 }
1426
1427 static int bond_option_lp_interval_set(struct bonding *bond,
1428                                        const struct bond_opt_value *newval)
1429 {
1430         bond->params.lp_interval = newval->value;
1431
1432         return 0;
1433 }
1434
1435 static int bond_option_pps_set(struct bonding *bond,
1436                                const struct bond_opt_value *newval)
1437 {
1438         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1439                    newval->value);
1440         bond->params.packets_per_slave = newval->value;
1441         if (newval->value > 0) {
1442                 bond->params.reciprocal_packets_per_slave =
1443                         reciprocal_value(newval->value);
1444         } else {
1445                 /* reciprocal_packets_per_slave is unused if
1446                  * packets_per_slave is 0 or 1, just initialize it
1447                  */
1448                 bond->params.reciprocal_packets_per_slave =
1449                         (struct reciprocal_value) { 0 };
1450         }
1451
1452         return 0;
1453 }
1454
1455 static int bond_option_lacp_active_set(struct bonding *bond,
1456                                        const struct bond_opt_value *newval)
1457 {
1458         netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1459                    newval->string, newval->value);
1460         bond->params.lacp_active = newval->value;
1461
1462         return 0;
1463 }
1464
1465 static int bond_option_lacp_rate_set(struct bonding *bond,
1466                                      const struct bond_opt_value *newval)
1467 {
1468         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1469                    newval->string, newval->value);
1470         bond->params.lacp_fast = newval->value;
1471         bond_3ad_update_lacp_rate(bond);
1472
1473         return 0;
1474 }
1475
1476 static int bond_option_ad_select_set(struct bonding *bond,
1477                                      const struct bond_opt_value *newval)
1478 {
1479         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1480                    newval->string, newval->value);
1481         bond->params.ad_select = newval->value;
1482
1483         return 0;
1484 }
1485
1486 static int bond_option_queue_id_set(struct bonding *bond,
1487                                     const struct bond_opt_value *newval)
1488 {
1489         struct slave *slave, *update_slave;
1490         struct net_device *sdev;
1491         struct list_head *iter;
1492         char *delim;
1493         int ret = 0;
1494         u16 qid;
1495
1496         /* delim will point to queue id if successful */
1497         delim = strchr(newval->string, ':');
1498         if (!delim)
1499                 goto err_no_cmd;
1500
1501         /* Terminate string that points to device name and bump it
1502          * up one, so we can read the queue id there.
1503          */
1504         *delim = '\0';
1505         if (sscanf(++delim, "%hd\n", &qid) != 1)
1506                 goto err_no_cmd;
1507
1508         /* Check buffer length, valid ifname and queue id */
1509         if (!dev_valid_name(newval->string) ||
1510             qid > bond->dev->real_num_tx_queues)
1511                 goto err_no_cmd;
1512
1513         /* Get the pointer to that interface if it exists */
1514         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1515         if (!sdev)
1516                 goto err_no_cmd;
1517
1518         /* Search for thes slave and check for duplicate qids */
1519         update_slave = NULL;
1520         bond_for_each_slave(bond, slave, iter) {
1521                 if (sdev == slave->dev)
1522                         /* We don't need to check the matching
1523                          * slave for dups, since we're overwriting it
1524                          */
1525                         update_slave = slave;
1526                 else if (qid && qid == slave->queue_id) {
1527                         goto err_no_cmd;
1528                 }
1529         }
1530
1531         if (!update_slave)
1532                 goto err_no_cmd;
1533
1534         /* Actually set the qids for the slave */
1535         update_slave->queue_id = qid;
1536
1537 out:
1538         return ret;
1539
1540 err_no_cmd:
1541         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1542         ret = -EPERM;
1543         goto out;
1544
1545 }
1546
1547 static int bond_option_slaves_set(struct bonding *bond,
1548                                   const struct bond_opt_value *newval)
1549 {
1550         char command[IFNAMSIZ + 1] = { 0, };
1551         struct net_device *dev;
1552         char *ifname;
1553         int ret;
1554
1555         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1556         ifname = command + 1;
1557         if ((strlen(command) <= 1) ||
1558             (command[0] != '+' && command[0] != '-') ||
1559             !dev_valid_name(ifname))
1560                 goto err_no_cmd;
1561
1562         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1563         if (!dev) {
1564                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1565                            ifname);
1566                 ret = -ENODEV;
1567                 goto out;
1568         }
1569
1570         switch (command[0]) {
1571         case '+':
1572                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1573                 ret = bond_enslave(bond->dev, dev, NULL);
1574                 break;
1575
1576         case '-':
1577                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1578                 ret = bond_release(bond->dev, dev);
1579                 break;
1580
1581         default:
1582                 /* should not run here. */
1583                 goto err_no_cmd;
1584         }
1585
1586 out:
1587         return ret;
1588
1589 err_no_cmd:
1590         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1591         ret = -EPERM;
1592         goto out;
1593 }
1594
1595 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1596                                           const struct bond_opt_value *newval)
1597 {
1598         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1599                    newval->string, newval->value);
1600         bond->params.tlb_dynamic_lb = newval->value;
1601
1602         return 0;
1603 }
1604
1605 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1606                                              const struct bond_opt_value *newval)
1607 {
1608         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1609                    newval->value);
1610
1611         bond->params.ad_actor_sys_prio = newval->value;
1612         bond_3ad_update_ad_actor_settings(bond);
1613
1614         return 0;
1615 }
1616
1617 static int bond_option_ad_actor_system_set(struct bonding *bond,
1618                                            const struct bond_opt_value *newval)
1619 {
1620         u8 macaddr[ETH_ALEN];
1621         u8 *mac;
1622
1623         if (newval->string) {
1624                 if (!mac_pton(newval->string, macaddr))
1625                         goto err;
1626                 mac = macaddr;
1627         } else {
1628                 mac = (u8 *)&newval->value;
1629         }
1630
1631         if (is_multicast_ether_addr(mac))
1632                 goto err;
1633
1634         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1635         ether_addr_copy(bond->params.ad_actor_system, mac);
1636         bond_3ad_update_ad_actor_settings(bond);
1637
1638         return 0;
1639
1640 err:
1641         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1642         return -EINVAL;
1643 }
1644
1645 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1646                                             const struct bond_opt_value *newval)
1647 {
1648         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1649                    newval->value);
1650
1651         bond->params.ad_user_port_key = newval->value;
1652         return 0;
1653 }