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_prio_set(struct bonding *bond,
  44                                 const struct bond_opt_value *newval);
  45 static int bond_option_primary_set(struct bonding *bond,
  46                                    const struct bond_opt_value *newval);
  47 static int bond_option_primary_reselect_set(struct bonding *bond,
  48                                             const struct bond_opt_value *newval);
  49 static int bond_option_fail_over_mac_set(struct bonding *bond,
  50                                          const struct bond_opt_value *newval);
  51 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  52                                             const struct bond_opt_value *newval);
  53 static int bond_option_resend_igmp_set(struct bonding *bond,
  54                                        const struct bond_opt_value *newval);
  55 static int bond_option_num_peer_notif_set(struct bonding *bond,
  56                                           const struct bond_opt_value *newval);
  57 static int bond_option_all_slaves_active_set(struct bonding *bond,
  58                                              const struct bond_opt_value *newval);
  59 static int bond_option_min_links_set(struct bonding *bond,
  60                                      const struct bond_opt_value *newval);
  61 static int bond_option_lp_interval_set(struct bonding *bond,
  62                                        const struct bond_opt_value *newval);
  63 static int bond_option_pps_set(struct bonding *bond,
  64                                const struct bond_opt_value *newval);
  65 static int bond_option_lacp_active_set(struct bonding *bond,
  66                                        const struct bond_opt_value *newval);
  67 static int bond_option_lacp_rate_set(struct bonding *bond,
  68                                      const struct bond_opt_value *newval);
  69 static int bond_option_ad_select_set(struct bonding *bond,
  70                                      const struct bond_opt_value *newval);
  71 static int bond_option_queue_id_set(struct bonding *bond,
  72                                     const struct bond_opt_value *newval);
  73 static int bond_option_mode_set(struct bonding *bond,
  74                                 const struct bond_opt_value *newval);
  75 static int bond_option_slaves_set(struct bonding *bond,
  76                                   const struct bond_opt_value *newval);
  77 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  78                                   const struct bond_opt_value *newval);
  79 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  80                                              const struct bond_opt_value *newval);
  81 static int bond_option_ad_actor_system_set(struct bonding *bond,
  82                                            const struct bond_opt_value *newval);
  83 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  84                                             const struct bond_opt_value *newval);
  85 static int bond_option_missed_max_set(struct bonding *bond,
  86                                       const struct bond_opt_value *newval);
  87
  88
  89 static const struct bond_opt_value bond_mode_tbl[] = {
  90         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  91         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  92         { "balance-xor",   BOND_MODE_XOR,          0},
  93         { "broadcast",     BOND_MODE_BROADCAST,    0},
  94         { "802.3ad",       BOND_MODE_8023AD,       0},
  95         { "balance-tlb",   BOND_MODE_TLB,          0},
  96         { "balance-alb",   BOND_MODE_ALB,          0},
  97         { NULL,            -1,                     0},
  98 };
  99
 100 static const struct bond_opt_value bond_pps_tbl[] = {
 101         { "default", 1,         BOND_VALFLAG_DEFAULT},
 102         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
 103         { NULL,      -1,        0},
 104 };
 105
 106 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
 107         { "layer2",      BOND_XMIT_POLICY_LAYER2,      BOND_VALFLAG_DEFAULT},
 108         { "layer3+4",    BOND_XMIT_POLICY_LAYER34,     0},
 109         { "layer2+3",    BOND_XMIT_POLICY_LAYER23,     0},
 110         { "encap2+3",    BOND_XMIT_POLICY_ENCAP23,     0},
 111         { "encap3+4",    BOND_XMIT_POLICY_ENCAP34,     0},
 112         { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
 113         { NULL,          -1,                           0},
 114 };
 115
 116 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 117         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 118         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 119         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 120         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 121         { "filter",             BOND_ARP_FILTER,                0},
 122         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 123         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 124         { NULL,                 -1,                             0},
 125 };
 126
 127 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 128         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 129         { "all", BOND_ARP_TARGETS_ALL, 0},
 130         { NULL,  -1,                   0},
 131 };
 132
 133 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 134         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 135         { "active", BOND_FOM_ACTIVE, 0},
 136         { "follow", BOND_FOM_FOLLOW, 0},
 137         { NULL,     -1,              0},
 138 };
 139
 140 static const struct bond_opt_value bond_intmax_tbl[] = {
 141         { "off",     0,       BOND_VALFLAG_DEFAULT},
 142         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 143         { NULL,      -1,      0}
 144 };
 145
 146 static const struct bond_opt_value bond_lacp_active[] = {
 147         { "off", 0,  0},
 148         { "on",  1,  BOND_VALFLAG_DEFAULT},
 149         { NULL,  -1, 0}
 150 };
 151
 152 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 153         { "slow", AD_LACP_SLOW, 0},
 154         { "fast", AD_LACP_FAST, 0},
 155         { NULL,   -1,           0},
 156 };
 157
 158 static const struct bond_opt_value bond_ad_select_tbl[] = {
 159         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 160         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 161         { "count",     BOND_AD_COUNT,     0},
 162         { NULL,        -1,                0},
 163 };
 164
 165 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 166         { "off",     0,   0},
 167         { "maxval",  255, BOND_VALFLAG_MAX},
 168         { "default", 1,   BOND_VALFLAG_DEFAULT},
 169         { NULL,      -1,  0}
 170 };
 171
 172 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 173         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 174         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 175         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 176         { NULL,      -1},
 177 };
 178
 179 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 180         { "off", 0,  0},
 181         { "on",  1,  BOND_VALFLAG_DEFAULT},
 182         { NULL,  -1, 0}
 183 };
 184
 185 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 186         { "off", 0,  BOND_VALFLAG_DEFAULT},
 187         { "on",  1,  0},
 188         { NULL,  -1, 0}
 189 };
 190
 191 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 192         { "off",     0,   0},
 193         { "maxval",  255, BOND_VALFLAG_MAX},
 194         { "default", 1,   BOND_VALFLAG_DEFAULT},
 195         { NULL,      -1,  0}
 196 };
 197
 198 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 199         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 200         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 201         { NULL,      -1,      0},
 202 };
 203
 204 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 205         { "off", 0,  0},
 206         { "on",  1,  BOND_VALFLAG_DEFAULT},
 207         { NULL,  -1, 0}
 208 };
 209
 210 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 211         { "minval",  1,     BOND_VALFLAG_MIN},
 212         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 213         { NULL,      -1,    0},
 214 };
 215
 216 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 217         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 218         { "maxval",  1023,  BOND_VALFLAG_MAX},
 219         { NULL,      -1,    0},
 220 };
 221
 222 static const struct bond_opt_value bond_missed_max_tbl[] = {
 223         { "minval",     1,      BOND_VALFLAG_MIN},
 224         { "maxval",     255,    BOND_VALFLAG_MAX},
 225         { "default",    2,      BOND_VALFLAG_DEFAULT},
 226         { NULL,         -1,     0},
 227 };
 228
 229 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 230         [BOND_OPT_MODE] = {
 231                 .id = BOND_OPT_MODE,
 232                 .name = "mode",
 233                 .desc = "bond device mode",
 234                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 235                 .values = bond_mode_tbl,
 236                 .set = bond_option_mode_set
 237         },
 238         [BOND_OPT_PACKETS_PER_SLAVE] = {
 239                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 240                 .name = "packets_per_slave",
 241                 .desc = "Packets to send per slave in RR mode",
 242                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 243                 .values = bond_pps_tbl,
 244                 .set = bond_option_pps_set
 245         },
 246         [BOND_OPT_XMIT_HASH] = {
 247                 .id = BOND_OPT_XMIT_HASH,
 248                 .name = "xmit_hash_policy",
 249                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 250                 .values = bond_xmit_hashtype_tbl,
 251                 .set = bond_option_xmit_hash_policy_set
 252         },
 253         [BOND_OPT_ARP_VALIDATE] = {
 254                 .id = BOND_OPT_ARP_VALIDATE,
 255                 .name = "arp_validate",
 256                 .desc = "validate src/dst of ARP probes",
 257                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 258                                BIT(BOND_MODE_ALB),
 259                 .values = bond_arp_validate_tbl,
 260                 .set = bond_option_arp_validate_set
 261         },
 262         [BOND_OPT_ARP_ALL_TARGETS] = {
 263                 .id = BOND_OPT_ARP_ALL_TARGETS,
 264                 .name = "arp_all_targets",
 265                 .desc = "fail on any/all arp targets timeout",
 266                 .values = bond_arp_all_targets_tbl,
 267                 .set = bond_option_arp_all_targets_set
 268         },
 269         [BOND_OPT_FAIL_OVER_MAC] = {
 270                 .id = BOND_OPT_FAIL_OVER_MAC,
 271                 .name = "fail_over_mac",
 272                 .desc = "For active-backup, do not set all slaves to the same MAC",
 273                 .flags = BOND_OPTFLAG_NOSLAVES,
 274                 .values = bond_fail_over_mac_tbl,
 275                 .set = bond_option_fail_over_mac_set
 276         },
 277         [BOND_OPT_ARP_INTERVAL] = {
 278                 .id = BOND_OPT_ARP_INTERVAL,
 279                 .name = "arp_interval",
 280                 .desc = "arp interval in milliseconds",
 281                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 282                                BIT(BOND_MODE_ALB),
 283                 .values = bond_intmax_tbl,
 284                 .set = bond_option_arp_interval_set
 285         },
 286         [BOND_OPT_MISSED_MAX] = {
 287                 .id = BOND_OPT_MISSED_MAX,
 288                 .name = "arp_missed_max",
 289                 .desc = "Maximum number of missed ARP interval",
 290                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 291                                BIT(BOND_MODE_ALB),
 292                 .values = bond_missed_max_tbl,
 293                 .set = bond_option_missed_max_set
 294         },
 295         [BOND_OPT_ARP_TARGETS] = {
 296                 .id = BOND_OPT_ARP_TARGETS,
 297                 .name = "arp_ip_target",
 298                 .desc = "arp targets in n.n.n.n form",
 299                 .flags = BOND_OPTFLAG_RAWVAL,
 300                 .set = bond_option_arp_ip_targets_set
 301         },
 302         [BOND_OPT_NS_TARGETS] = {
 303                 .id = BOND_OPT_NS_TARGETS,
 304                 .name = "ns_ip6_target",
 305                 .desc = "NS targets in ffff:ffff::ffff:ffff form",
 306                 .flags = BOND_OPTFLAG_RAWVAL,
 307                 .set = bond_option_ns_ip6_targets_set
 308         },
 309         [BOND_OPT_DOWNDELAY] = {
 310                 .id = BOND_OPT_DOWNDELAY,
 311                 .name = "downdelay",
 312                 .desc = "Delay before considering link down, in milliseconds",
 313                 .values = bond_intmax_tbl,
 314                 .set = bond_option_downdelay_set
 315         },
 316         [BOND_OPT_UPDELAY] = {
 317                 .id = BOND_OPT_UPDELAY,
 318                 .name = "updelay",
 319                 .desc = "Delay before considering link up, in milliseconds",
 320                 .values = bond_intmax_tbl,
 321                 .set = bond_option_updelay_set
 322         },
 323         [BOND_OPT_LACP_ACTIVE] = {
 324                 .id = BOND_OPT_LACP_ACTIVE,
 325                 .name = "lacp_active",
 326                 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
 327                 .flags = BOND_OPTFLAG_IFDOWN,
 328                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 329                 .values = bond_lacp_active,
 330                 .set = bond_option_lacp_active_set
 331         },
 332         [BOND_OPT_LACP_RATE] = {
 333                 .id = BOND_OPT_LACP_RATE,
 334                 .name = "lacp_rate",
 335                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 336                 .flags = BOND_OPTFLAG_IFDOWN,
 337                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 338                 .values = bond_lacp_rate_tbl,
 339                 .set = bond_option_lacp_rate_set
 340         },
 341         [BOND_OPT_MINLINKS] = {
 342                 .id = BOND_OPT_MINLINKS,
 343                 .name = "min_links",
 344                 .desc = "Minimum number of available links before turning on carrier",
 345                 .values = bond_intmax_tbl,
 346                 .set = bond_option_min_links_set
 347         },
 348         [BOND_OPT_AD_SELECT] = {
 349                 .id = BOND_OPT_AD_SELECT,
 350                 .name = "ad_select",
 351                 .desc = "803.ad aggregation selection logic",
 352                 .flags = BOND_OPTFLAG_IFDOWN,
 353                 .values = bond_ad_select_tbl,
 354                 .set = bond_option_ad_select_set
 355         },
 356         [BOND_OPT_NUM_PEER_NOTIF] = {
 357                 .id = BOND_OPT_NUM_PEER_NOTIF,
 358                 .name = "num_unsol_na",
 359                 .desc = "Number of peer notifications to send on failover event",
 360                 .values = bond_num_peer_notif_tbl,
 361                 .set = bond_option_num_peer_notif_set
 362         },
 363         [BOND_OPT_MIIMON] = {
 364                 .id = BOND_OPT_MIIMON,
 365                 .name = "miimon",
 366                 .desc = "Link check interval in milliseconds",
 367                 .values = bond_intmax_tbl,
 368                 .set = bond_option_miimon_set
 369         },
 370         [BOND_OPT_PRIO] = {
 371                 .id = BOND_OPT_PRIO,
 372                 .name = "prio",
 373                 .desc = "Link priority for failover re-selection",
 374                 .flags = BOND_OPTFLAG_RAWVAL,
 375                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 376                                                 BIT(BOND_MODE_TLB) |
 377                                                 BIT(BOND_MODE_ALB)),
 378                 .set = bond_option_prio_set
 379         },
 380         [BOND_OPT_PRIMARY] = {
 381                 .id = BOND_OPT_PRIMARY,
 382                 .name = "primary",
 383                 .desc = "Primary network device to use",
 384                 .flags = BOND_OPTFLAG_RAWVAL,
 385                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 386                                                 BIT(BOND_MODE_TLB) |
 387                                                 BIT(BOND_MODE_ALB)),
 388                 .set = bond_option_primary_set
 389         },
 390         [BOND_OPT_PRIMARY_RESELECT] = {
 391                 .id = BOND_OPT_PRIMARY_RESELECT,
 392                 .name = "primary_reselect",
 393                 .desc = "Reselect primary slave once it comes up",
 394                 .values = bond_primary_reselect_tbl,
 395                 .set = bond_option_primary_reselect_set
 396         },
 397         [BOND_OPT_USE_CARRIER] = {
 398                 .id = BOND_OPT_USE_CARRIER,
 399                 .name = "use_carrier",
 400                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 401                 .values = bond_use_carrier_tbl,
 402                 .set = bond_option_use_carrier_set
 403         },
 404         [BOND_OPT_ACTIVE_SLAVE] = {
 405                 .id = BOND_OPT_ACTIVE_SLAVE,
 406                 .name = "active_slave",
 407                 .desc = "Currently active slave",
 408                 .flags = BOND_OPTFLAG_RAWVAL,
 409                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 410                                                 BIT(BOND_MODE_TLB) |
 411                                                 BIT(BOND_MODE_ALB)),
 412                 .set = bond_option_active_slave_set
 413         },
 414         [BOND_OPT_QUEUE_ID] = {
 415                 .id = BOND_OPT_QUEUE_ID,
 416                 .name = "queue_id",
 417                 .desc = "Set queue id of a slave",
 418                 .flags = BOND_OPTFLAG_RAWVAL,
 419                 .set = bond_option_queue_id_set
 420         },
 421         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 422                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 423                 .name = "all_slaves_active",
 424                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 425                 .values = bond_all_slaves_active_tbl,
 426                 .set = bond_option_all_slaves_active_set
 427         },
 428         [BOND_OPT_RESEND_IGMP] = {
 429                 .id = BOND_OPT_RESEND_IGMP,
 430                 .name = "resend_igmp",
 431                 .desc = "Number of IGMP membership reports to send on link failure",
 432                 .values = bond_resend_igmp_tbl,
 433                 .set = bond_option_resend_igmp_set
 434         },
 435         [BOND_OPT_LP_INTERVAL] = {
 436                 .id = BOND_OPT_LP_INTERVAL,
 437                 .name = "lp_interval",
 438                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 439                 .values = bond_lp_interval_tbl,
 440                 .set = bond_option_lp_interval_set
 441         },
 442         [BOND_OPT_SLAVES] = {
 443                 .id = BOND_OPT_SLAVES,
 444                 .name = "slaves",
 445                 .desc = "Slave membership management",
 446                 .flags = BOND_OPTFLAG_RAWVAL,
 447                 .set = bond_option_slaves_set
 448         },
 449         [BOND_OPT_TLB_DYNAMIC_LB] = {
 450                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 451                 .name = "tlb_dynamic_lb",
 452                 .desc = "Enable dynamic flow shuffling",
 453                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
 454                 .values = bond_tlb_dynamic_lb_tbl,
 455                 .flags = BOND_OPTFLAG_IFDOWN,
 456                 .set = bond_option_tlb_dynamic_lb_set,
 457         },
 458         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 459                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 460                 .name = "ad_actor_sys_prio",
 461                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 462                 .values = bond_ad_actor_sys_prio_tbl,
 463                 .set = bond_option_ad_actor_sys_prio_set,
 464         },
 465         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 466                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 467                 .name = "ad_actor_system",
 468                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 469                 .flags = BOND_OPTFLAG_RAWVAL,
 470                 .set = bond_option_ad_actor_system_set,
 471         },
 472         [BOND_OPT_AD_USER_PORT_KEY] = {
 473                 .id = BOND_OPT_AD_USER_PORT_KEY,
 474                 .name = "ad_user_port_key",
 475                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 476                 .flags = BOND_OPTFLAG_IFDOWN,
 477                 .values = bond_ad_user_port_key_tbl,
 478                 .set = bond_option_ad_user_port_key_set,
 479         },
 480         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 481                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 482                 .name = "num_grat_arp",
 483                 .desc = "Number of peer notifications to send on failover event",
 484                 .values = bond_num_peer_notif_tbl,
 485                 .set = bond_option_num_peer_notif_set
 486         },
 487         [BOND_OPT_PEER_NOTIF_DELAY] = {
 488                 .id = BOND_OPT_PEER_NOTIF_DELAY,
 489                 .name = "peer_notif_delay",
 490                 .desc = "Delay between each peer notification on failover event, in milliseconds",
 491                 .values = bond_intmax_tbl,
 492                 .set = bond_option_peer_notif_delay_set
 493         }
 494 };
 495
 496 /* Searches for an option by name */
 497 const struct bond_option *bond_opt_get_by_name(const char *name)
 498 {
 499         const struct bond_option *opt;
 500         int option;
 501
 502         for (option = 0; option < BOND_OPT_LAST; option++) {
 503                 opt = bond_opt_get(option);
 504                 if (opt && !strcmp(opt->name, name))
 505                         return opt;
 506         }
 507
 508         return NULL;
 509 }
 510
 511 /* Searches for a value in opt's values[] table */
 512 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 513 {
 514         const struct bond_option *opt;
 515         int i;
 516
 517         opt = bond_opt_get(option);
 518         if (WARN_ON(!opt))
 519                 return NULL;
 520         for (i = 0; opt->values && opt->values[i].string; i++)
 521                 if (opt->values[i].value == val)
 522                         return &opt->values[i];
 523
 524         return NULL;
 525 }
 526
 527 /* Searches for a value in opt's values[] table which matches the flagmask */
 528 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 529                                                        u32 flagmask)
 530 {
 531         int i;
 532
 533         for (i = 0; opt->values && opt->values[i].string; i++)
 534                 if (opt->values[i].flags & flagmask)
 535                         return &opt->values[i];
 536
 537         return NULL;
 538 }
 539
 540 /* If maxval is missing then there's no range to check. In case minval is
 541  * missing then it's considered to be 0.
 542  */
 543 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 544 {
 545         const struct bond_opt_value *minval, *maxval;
 546
 547         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 548         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 549         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 550                 return false;
 551
 552         return true;
 553 }
 554
 555 /**
 556  * bond_opt_parse - parse option value
 557  * @opt: the option to parse against
 558  * @val: value to parse
 559  *
 560  * This function tries to extract the value from @val and check if it's
 561  * a possible match for the option and returns NULL if a match isn't found,
 562  * or the struct_opt_value that matched. It also strips the new line from
 563  * @val->string if it's present.
 564  */
 565 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 566                                             struct bond_opt_value *val)
 567 {
 568         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 569         const struct bond_opt_value *tbl;
 570         const struct bond_opt_value *ret = NULL;
 571         bool checkval;
 572         int i, rv;
 573
 574         /* No parsing if the option wants a raw val */
 575         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 576                 return val;
 577
 578         tbl = opt->values;
 579         if (!tbl)
 580                 goto out;
 581
 582         /* ULLONG_MAX is used to bypass string processing */
 583         checkval = val->value != ULLONG_MAX;
 584         if (!checkval) {
 585                 if (!val->string)
 586                         goto out;
 587                 p = strchr(val->string, '\n');
 588                 if (p)
 589                         *p = '\0';
 590                 for (p = val->string; *p; p++)
 591                         if (!(isdigit(*p) || isspace(*p)))
 592                                 break;
 593                 /* The following code extracts the string to match or the value
 594                  * and sets checkval appropriately
 595                  */
 596                 if (*p) {
 597                         rv = sscanf(val->string, "%32s", valstr);
 598                 } else {
 599                         rv = sscanf(val->string, "%llu", &val->value);
 600                         checkval = true;
 601                 }
 602                 if (!rv)
 603                         goto out;
 604         }
 605
 606         for (i = 0; tbl[i].string; i++) {
 607                 /* Check for exact match */
 608                 if (checkval) {
 609                         if (val->value == tbl[i].value)
 610                                 ret = &tbl[i];
 611                 } else {
 612                         if (!strcmp(valstr, "default") &&
 613                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 614                                 ret = &tbl[i];
 615
 616                         if (!strcmp(valstr, tbl[i].string))
 617                                 ret = &tbl[i];
 618                 }
 619                 /* Found an exact match */
 620                 if (ret)
 621                         goto out;
 622         }
 623         /* Possible range match */
 624         if (checkval && bond_opt_check_range(opt, val->value))
 625                 ret = val;
 626 out:
 627         return ret;
 628 }
 629
 630 /* Check opt's dependencies against bond mode and currently set options */
 631 static int bond_opt_check_deps(struct bonding *bond,
 632                                const struct bond_option *opt)
 633 {
 634         struct bond_params *params = &bond->params;
 635
 636         if (test_bit(params->mode, &opt->unsuppmodes))
 637                 return -EACCES;
 638         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 639                 return -ENOTEMPTY;
 640         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 641                 return -EBUSY;
 642
 643         return 0;
 644 }
 645
 646 static void bond_opt_dep_print(struct bonding *bond,
 647                                const struct bond_option *opt,
 648                                struct nlattr *bad_attr,
 649                                struct netlink_ext_ack *extack)
 650 {
 651         const struct bond_opt_value *modeval;
 652         struct bond_params *params;
 653
 654         params = &bond->params;
 655         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 656         if (test_bit(params->mode, &opt->unsuppmodes)) {
 657                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 658                            opt->name, modeval->string, modeval->value);
 659                 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 660                                     "option not supported in mode");
 661         }
 662 }
 663
 664 static void bond_opt_error_interpret(struct bonding *bond,
 665                                      const struct bond_option *opt,
 666                                      int error, const struct bond_opt_value *val,
 667                                      struct nlattr *bad_attr,
 668                                      struct netlink_ext_ack *extack)
 669 {
 670         const struct bond_opt_value *minval, *maxval;
 671         char *p;
 672
 673         switch (error) {
 674         case -EINVAL:
 675                 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
 676                 if (val) {
 677                         if (val->string) {
 678                                 /* sometimes RAWVAL opts may have new lines */
 679                                 p = strchr(val->string, '\n');
 680                                 if (p)
 681                                         *p = '\0';
 682                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 683                                            opt->name, val->string);
 684                         } else {
 685                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 686                                            opt->name, val->value);
 687                         }
 688                 }
 689                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 690                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 691                 if (!maxval)
 692                         break;
 693                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 694                            opt->name, minval ? minval->value : 0, maxval->value);
 695                 break;
 696         case -EACCES:
 697                 bond_opt_dep_print(bond, opt, bad_attr, extack);
 698                 break;
 699         case -ENOTEMPTY:
 700                 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 701                                     "unable to set option because the bond device has slaves");
 702                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 703                            opt->name);
 704                 break;
 705         case -EBUSY:
 706                 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 707                                     "unable to set option because the bond is up");
 708                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 709                            opt->name);
 710                 break;
 711         case -ENODEV:
 712                 if (val && val->string) {
 713                         p = strchr(val->string, '\n');
 714                         if (p)
 715                                 *p = '\0';
 716                         netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
 717                                    opt->name, val->string);
 718                         NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 719                                             "interface does not exist");
 720                 }
 721                 break;
 722         default:
 723                 break;
 724         }
 725 }
 726
 727 /**
 728  * __bond_opt_set - set a bonding option
 729  * @bond: target bond device
 730  * @option: option to set
 731  * @val: value to set it to
 732  * @bad_attr: netlink attribue that caused the error
 733  * @extack: extended netlink error structure, used when an error message
 734  *          needs to be returned to the caller via netlink
 735  *
 736  * This function is used to change the bond's option value, it can be
 737  * used for both enabling/changing an option and for disabling it. RTNL lock
 738  * must be obtained before calling this function.
 739  */
 740 int __bond_opt_set(struct bonding *bond,
 741                    unsigned int option, struct bond_opt_value *val,
 742                    struct nlattr *bad_attr, struct netlink_ext_ack *extack)
 743 {
 744         const struct bond_opt_value *retval = NULL;
 745         const struct bond_option *opt;
 746         int ret = -ENOENT;
 747
 748         ASSERT_RTNL();
 749
 750         opt = bond_opt_get(option);
 751         if (WARN_ON(!val) || WARN_ON(!opt))
 752                 goto out;
 753         ret = bond_opt_check_deps(bond, opt);
 754         if (ret)
 755                 goto out;
 756         retval = bond_opt_parse(opt, val);
 757         if (!retval) {
 758                 ret = -EINVAL;
 759                 goto out;
 760         }
 761         ret = opt->set(bond, retval);
 762 out:
 763         if (ret)
 764                 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
 765
 766         return ret;
 767 }
 768 /**
 769  * __bond_opt_set_notify - set a bonding option
 770  * @bond: target bond device
 771  * @option: option to set
 772  * @val: value to set it to
 773  *
 774  * This function is used to change the bond's option value and trigger
 775  * a notification to user sapce. It can be used for both enabling/changing
 776  * an option and for disabling it. RTNL lock must be obtained before calling
 777  * this function.
 778  */
 779 int __bond_opt_set_notify(struct bonding *bond,
 780                           unsigned int option, struct bond_opt_value *val)
 781 {
 782         int ret;
 783
 784         ASSERT_RTNL();
 785
 786         ret = __bond_opt_set(bond, option, val, NULL, NULL);
 787
 788         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 789                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 790
 791         return ret;
 792 }
 793
 794 /**
 795  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 796  * @bond: target bond device
 797  * @option: option to set
 798  * @buf: value to set it to
 799  *
 800  * This function tries to acquire RTNL without blocking and if successful
 801  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 802  */
 803 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 804 {
 805         struct bond_opt_value optval;
 806         int ret;
 807
 808         if (!rtnl_trylock())
 809                 return restart_syscall();
 810         bond_opt_initstr(&optval, buf);
 811         ret = __bond_opt_set_notify(bond, option, &optval);
 812         rtnl_unlock();
 813
 814         return ret;
 815 }
 816
 817 /**
 818  * bond_opt_get - get a pointer to an option
 819  * @option: option for which to return a pointer
 820  *
 821  * This function checks if option is valid and if so returns a pointer
 822  * to its entry in the bond_opts[] option array.
 823  */
 824 const struct bond_option *bond_opt_get(unsigned int option)
 825 {
 826         if (!BOND_OPT_VALID(option))
 827                 return NULL;
 828
 829         return &bond_opts[option];
 830 }
 831
 832 static bool bond_set_xfrm_features(struct bonding *bond)
 833 {
 834         if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
 835                 return false;
 836
 837         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
 838                 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
 839         else
 840                 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
 841
 842         return true;
 843 }
 844
 845 static int bond_option_mode_set(struct bonding *bond,
 846                                 const struct bond_opt_value *newval)
 847 {
 848         if (!bond_mode_uses_arp(newval->value)) {
 849                 if (bond->params.arp_interval) {
 850                         netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 851                                    newval->string);
 852                         /* disable arp monitoring */
 853                         bond->params.arp_interval = 0;
 854                 }
 855
 856                 if (!bond->params.miimon) {
 857                         /* set miimon to default value */
 858                         bond->params.miimon = BOND_DEFAULT_MIIMON;
 859                         netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 860                                    bond->params.miimon);
 861                 }
 862         }
 863
 864         if (newval->value == BOND_MODE_ALB)
 865                 bond->params.tlb_dynamic_lb = 1;
 866
 867         /* don't cache arp_validate between modes */
 868         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 869         bond->params.mode = newval->value;
 870
 871         if (bond->dev->reg_state == NETREG_REGISTERED) {
 872                 bool update = false;
 873
 874                 update |= bond_set_xfrm_features(bond);
 875
 876                 if (update)
 877                         netdev_update_features(bond->dev);
 878         }
 879
 880         bond_xdp_set_features(bond->dev);
 881
 882         return 0;
 883 }
 884
 885 static int bond_option_active_slave_set(struct bonding *bond,
 886                                         const struct bond_opt_value *newval)
 887 {
 888         char ifname[IFNAMSIZ] = { 0, };
 889         struct net_device *slave_dev;
 890         int ret = 0;
 891
 892         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 893         if (!strlen(ifname) || newval->string[0] == '\n') {
 894                 slave_dev = NULL;
 895         } else {
 896                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 897                 if (!slave_dev)
 898                         return -ENODEV;
 899         }
 900
 901         if (slave_dev) {
 902                 if (!netif_is_bond_slave(slave_dev)) {
 903                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 904                         return -EINVAL;
 905                 }
 906
 907                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 908                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 909                         return -EINVAL;
 910                 }
 911         }
 912
 913         block_netpoll_tx();
 914         /* check to see if we are clearing active */
 915         if (!slave_dev) {
 916                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 917                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 918                 bond_select_active_slave(bond);
 919         } else {
 920                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 921                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 922
 923                 BUG_ON(!new_active);
 924
 925                 if (new_active == old_active) {
 926                         /* do nothing */
 927                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 928                 } else {
 929                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 930                             bond_slave_is_up(new_active)) {
 931                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 932                                 bond_change_active_slave(bond, new_active);
 933                         } else {
 934                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 935                                           new_active->dev->name);
 936                                 ret = -EINVAL;
 937                         }
 938                 }
 939         }
 940         unblock_netpoll_tx();
 941
 942         return ret;
 943 }
 944
 945 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 946  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 947  * start it.
 948  */
 949 static int bond_option_miimon_set(struct bonding *bond,
 950                                   const struct bond_opt_value *newval)
 951 {
 952         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 953                    newval->value);
 954         bond->params.miimon = newval->value;
 955         if (bond->params.updelay)
 956                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 957                            bond->params.updelay * bond->params.miimon);
 958         if (bond->params.downdelay)
 959                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 960                            bond->params.downdelay * bond->params.miimon);
 961         if (bond->params.peer_notif_delay)
 962                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 963                            bond->params.peer_notif_delay * bond->params.miimon);
 964         if (newval->value && bond->params.arp_interval) {
 965                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 966                 bond->params.arp_interval = 0;
 967                 if (bond->params.arp_validate)
 968                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 969         }
 970         if (bond->dev->flags & IFF_UP) {
 971                 /* If the interface is up, we may need to fire off
 972                  * the MII timer. If the interface is down, the
 973                  * timer will get fired off when the open function
 974                  * is called.
 975                  */
 976                 if (!newval->value) {
 977                         cancel_delayed_work_sync(&bond->mii_work);
 978                 } else {
 979                         cancel_delayed_work_sync(&bond->arp_work);
 980                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 981                 }
 982         }
 983
 984         return 0;
 985 }
 986
 987 /* Set up, down and peer notification delays. These must be multiples
 988  * of the MII monitoring value, and are stored internally as the
 989  * multiplier. Thus, we must translate to MS for the real world.
 990  */
 991 static int _bond_option_delay_set(struct bonding *bond,
 992                                   const struct bond_opt_value *newval,
 993                                   const char *name,
 994                                   int *target)
 995 {
 996         int value = newval->value;
 997
 998         if (!bond->params.miimon) {
 999                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1000                            name);
1001                 return -EPERM;
1002         }
1003         if ((value % bond->params.miimon) != 0) {
1004                 netdev_warn(bond->dev,
1005                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1006                             name,
1007                             value, bond->params.miimon,
1008                             (value / bond->params.miimon) *
1009                             bond->params.miimon);
1010         }
1011         *target = value / bond->params.miimon;
1012         netdev_dbg(bond->dev, "Setting %s to %d\n",
1013                    name,
1014                    *target * bond->params.miimon);
1015
1016         return 0;
1017 }
1018
1019 static int bond_option_updelay_set(struct bonding *bond,
1020                                    const struct bond_opt_value *newval)
1021 {
1022         return _bond_option_delay_set(bond, newval, "up delay",
1023                                       &bond->params.updelay);
1024 }
1025
1026 static int bond_option_downdelay_set(struct bonding *bond,
1027                                      const struct bond_opt_value *newval)
1028 {
1029         return _bond_option_delay_set(bond, newval, "down delay",
1030                                       &bond->params.downdelay);
1031 }
1032
1033 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1034                                             const struct bond_opt_value *newval)
1035 {
1036         int ret = _bond_option_delay_set(bond, newval,
1037                                          "peer notification delay",
1038                                          &bond->params.peer_notif_delay);
1039         return ret;
1040 }
1041
1042 static int bond_option_use_carrier_set(struct bonding *bond,
1043                                        const struct bond_opt_value *newval)
1044 {
1045         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1046                    newval->value);
1047         bond->params.use_carrier = newval->value;
1048
1049         return 0;
1050 }
1051
1052 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
1053  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
1054  * we must start it.
1055  */
1056 static int bond_option_arp_interval_set(struct bonding *bond,
1057                                         const struct bond_opt_value *newval)
1058 {
1059         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1060                    newval->value);
1061         bond->params.arp_interval = newval->value;
1062         if (newval->value) {
1063                 if (bond->params.miimon) {
1064                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1065                         bond->params.miimon = 0;
1066                 }
1067                 if (!bond->params.arp_targets[0])
1068                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1069         }
1070         if (bond->dev->flags & IFF_UP) {
1071                 /* If the interface is up, we may need to fire off
1072                  * the ARP timer.  If the interface is down, the
1073                  * timer will get fired off when the open function
1074                  * is called.
1075                  */
1076                 if (!newval->value) {
1077                         if (bond->params.arp_validate)
1078                                 bond->recv_probe = NULL;
1079                         cancel_delayed_work_sync(&bond->arp_work);
1080                 } else {
1081                         /* arp_validate can be set only in active-backup mode */
1082                         bond->recv_probe = bond_rcv_validate;
1083                         cancel_delayed_work_sync(&bond->mii_work);
1084                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
1085                 }
1086         }
1087
1088         return 0;
1089 }
1090
1091 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1092                                             __be32 target,
1093                                             unsigned long last_rx)
1094 {
1095         __be32 *targets = bond->params.arp_targets;
1096         struct list_head *iter;
1097         struct slave *slave;
1098
1099         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1100                 bond_for_each_slave(bond, slave, iter)
1101                         slave->target_last_arp_rx[slot] = last_rx;
1102                 targets[slot] = target;
1103         }
1104 }
1105
1106 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1107 {
1108         __be32 *targets = bond->params.arp_targets;
1109         int ind;
1110
1111         if (!bond_is_ip_target_ok(target)) {
1112                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1113                            &target);
1114                 return -EINVAL;
1115         }
1116
1117         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1118                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1119                            &target);
1120                 return -EINVAL;
1121         }
1122
1123         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1124         if (ind == -1) {
1125                 netdev_err(bond->dev, "ARP target table is full!\n");
1126                 return -EINVAL;
1127         }
1128
1129         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1130
1131         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1132
1133         return 0;
1134 }
1135
1136 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1137 {
1138         return _bond_option_arp_ip_target_add(bond, target);
1139 }
1140
1141 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1142 {
1143         __be32 *targets = bond->params.arp_targets;
1144         struct list_head *iter;
1145         struct slave *slave;
1146         unsigned long *targets_rx;
1147         int ind, i;
1148
1149         if (!bond_is_ip_target_ok(target)) {
1150                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1151                            &target);
1152                 return -EINVAL;
1153         }
1154
1155         ind = bond_get_targets_ip(targets, target);
1156         if (ind == -1) {
1157                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1158                            &target);
1159                 return -EINVAL;
1160         }
1161
1162         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1163                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1164
1165         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1166
1167         bond_for_each_slave(bond, slave, iter) {
1168                 targets_rx = slave->target_last_arp_rx;
1169                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1170                         targets_rx[i] = targets_rx[i+1];
1171                 targets_rx[i] = 0;
1172         }
1173         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1174                 targets[i] = targets[i+1];
1175         targets[i] = 0;
1176
1177         return 0;
1178 }
1179
1180 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1181 {
1182         int i;
1183
1184         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1185                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1186 }
1187
1188 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1189                                           const struct bond_opt_value *newval)
1190 {
1191         int ret = -EPERM;
1192         __be32 target;
1193
1194         if (newval->string) {
1195                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1196                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1197                                    &target);
1198                         return ret;
1199                 }
1200                 if (newval->string[0] == '+')
1201                         ret = bond_option_arp_ip_target_add(bond, target);
1202                 else if (newval->string[0] == '-')
1203                         ret = bond_option_arp_ip_target_rem(bond, target);
1204                 else
1205                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1206         } else {
1207                 target = newval->value;
1208                 ret = bond_option_arp_ip_target_add(bond, target);
1209         }
1210
1211         return ret;
1212 }
1213
1214 #if IS_ENABLED(CONFIG_IPV6)
1215 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1216                                             struct in6_addr *target,
1217                                             unsigned long last_rx)
1218 {
1219         struct in6_addr *targets = bond->params.ns_targets;
1220         struct list_head *iter;
1221         struct slave *slave;
1222
1223         if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1224                 bond_for_each_slave(bond, slave, iter)
1225                         slave->target_last_arp_rx[slot] = last_rx;
1226                 targets[slot] = *target;
1227         }
1228 }
1229
1230 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1231 {
1232         struct in6_addr addr_any = in6addr_any;
1233         int i;
1234
1235         for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1236                 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1237 }
1238
1239 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1240                                           const struct bond_opt_value *newval)
1241 {
1242         struct in6_addr *target = (struct in6_addr *)newval->extra;
1243         struct in6_addr *targets = bond->params.ns_targets;
1244         struct in6_addr addr_any = in6addr_any;
1245         int index;
1246
1247         if (!bond_is_ip6_target_ok(target)) {
1248                 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1249                            target);
1250                 return -EINVAL;
1251         }
1252
1253         if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1254                 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1255                            target);
1256                 return -EINVAL;
1257         }
1258
1259         index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1260         if (index == -1) {
1261                 netdev_err(bond->dev, "NS target table is full!\n");
1262                 return -EINVAL;
1263         }
1264
1265         netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1266
1267         _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1268
1269         return 0;
1270 }
1271 #else
1272 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1273                                           const struct bond_opt_value *newval)
1274 {
1275         return -EPERM;
1276 }
1277 #endif
1278
1279 static int bond_option_arp_validate_set(struct bonding *bond,
1280                                         const struct bond_opt_value *newval)
1281 {
1282         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1283                    newval->string, newval->value);
1284         bond->params.arp_validate = newval->value;
1285
1286         return 0;
1287 }
1288
1289 static int bond_option_arp_all_targets_set(struct bonding *bond,
1290                                            const struct bond_opt_value *newval)
1291 {
1292         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1293                    newval->string, newval->value);
1294         bond->params.arp_all_targets = newval->value;
1295
1296         return 0;
1297 }
1298
1299 static int bond_option_missed_max_set(struct bonding *bond,
1300                                       const struct bond_opt_value *newval)
1301 {
1302         netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1303                    newval->string, newval->value);
1304         bond->params.missed_max = newval->value;
1305
1306         return 0;
1307 }
1308
1309 static int bond_option_prio_set(struct bonding *bond,
1310                                 const struct bond_opt_value *newval)
1311 {
1312         struct slave *slave;
1313
1314         slave = bond_slave_get_rtnl(newval->slave_dev);
1315         if (!slave) {
1316                 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1317                 return -ENODEV;
1318         }
1319         slave->prio = newval->value;
1320
1321         if (rtnl_dereference(bond->primary_slave))
1322                 slave_warn(bond->dev, slave->dev,
1323                            "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1324         else
1325                 bond_select_active_slave(bond);
1326
1327         return 0;
1328 }
1329
1330 static int bond_option_primary_set(struct bonding *bond,
1331                                    const struct bond_opt_value *newval)
1332 {
1333         char *p, *primary = newval->string;
1334         struct list_head *iter;
1335         struct slave *slave;
1336
1337         block_netpoll_tx();
1338
1339         p = strchr(primary, '\n');
1340         if (p)
1341                 *p = '\0';
1342         /* check to see if we are clearing primary */
1343         if (!strlen(primary)) {
1344                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1345                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1346                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1347                 bond_select_active_slave(bond);
1348                 goto out;
1349         }
1350
1351         bond_for_each_slave(bond, slave, iter) {
1352                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1353                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1354                         rcu_assign_pointer(bond->primary_slave, slave);
1355                         strcpy(bond->params.primary, slave->dev->name);
1356                         bond->force_primary = true;
1357                         bond_select_active_slave(bond);
1358                         goto out;
1359                 }
1360         }
1361
1362         if (rtnl_dereference(bond->primary_slave)) {
1363                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1364                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1365                 bond_select_active_slave(bond);
1366         }
1367         strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1368
1369         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1370                    primary);
1371
1372 out:
1373         unblock_netpoll_tx();
1374
1375         return 0;
1376 }
1377
1378 static int bond_option_primary_reselect_set(struct bonding *bond,
1379                                             const struct bond_opt_value *newval)
1380 {
1381         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1382                    newval->string, newval->value);
1383         bond->params.primary_reselect = newval->value;
1384
1385         block_netpoll_tx();
1386         bond_select_active_slave(bond);
1387         unblock_netpoll_tx();
1388
1389         return 0;
1390 }
1391
1392 static int bond_option_fail_over_mac_set(struct bonding *bond,
1393                                          const struct bond_opt_value *newval)
1394 {
1395         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1396                    newval->string, newval->value);
1397         bond->params.fail_over_mac = newval->value;
1398
1399         return 0;
1400 }
1401
1402 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1403                                             const struct bond_opt_value *newval)
1404 {
1405         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1406                    newval->string, newval->value);
1407         bond->params.xmit_policy = newval->value;
1408
1409         return 0;
1410 }
1411
1412 static int bond_option_resend_igmp_set(struct bonding *bond,
1413                                        const struct bond_opt_value *newval)
1414 {
1415         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1416                    newval->value);
1417         bond->params.resend_igmp = newval->value;
1418
1419         return 0;
1420 }
1421
1422 static int bond_option_num_peer_notif_set(struct bonding *bond,
1423                                    const struct bond_opt_value *newval)
1424 {
1425         bond->params.num_peer_notif = newval->value;
1426
1427         return 0;
1428 }
1429
1430 static int bond_option_all_slaves_active_set(struct bonding *bond,
1431                                              const struct bond_opt_value *newval)
1432 {
1433         struct list_head *iter;
1434         struct slave *slave;
1435
1436         if (newval->value == bond->params.all_slaves_active)
1437                 return 0;
1438         bond->params.all_slaves_active = newval->value;
1439         bond_for_each_slave(bond, slave, iter) {
1440                 if (!bond_is_active_slave(slave)) {
1441                         if (newval->value)
1442                                 slave->inactive = 0;
1443                         else
1444                                 slave->inactive = 1;
1445                 }
1446         }
1447
1448         return 0;
1449 }
1450
1451 static int bond_option_min_links_set(struct bonding *bond,
1452                                      const struct bond_opt_value *newval)
1453 {
1454         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1455                    newval->value);
1456         bond->params.min_links = newval->value;
1457         bond_set_carrier(bond);
1458
1459         return 0;
1460 }
1461
1462 static int bond_option_lp_interval_set(struct bonding *bond,
1463                                        const struct bond_opt_value *newval)
1464 {
1465         bond->params.lp_interval = newval->value;
1466
1467         return 0;
1468 }
1469
1470 static int bond_option_pps_set(struct bonding *bond,
1471                                const struct bond_opt_value *newval)
1472 {
1473         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1474                    newval->value);
1475         bond->params.packets_per_slave = newval->value;
1476         if (newval->value > 0) {
1477                 bond->params.reciprocal_packets_per_slave =
1478                         reciprocal_value(newval->value);
1479         } else {
1480                 /* reciprocal_packets_per_slave is unused if
1481                  * packets_per_slave is 0 or 1, just initialize it
1482                  */
1483                 bond->params.reciprocal_packets_per_slave =
1484                         (struct reciprocal_value) { 0 };
1485         }
1486
1487         return 0;
1488 }
1489
1490 static int bond_option_lacp_active_set(struct bonding *bond,
1491                                        const struct bond_opt_value *newval)
1492 {
1493         netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1494                    newval->string, newval->value);
1495         bond->params.lacp_active = newval->value;
1496
1497         return 0;
1498 }
1499
1500 static int bond_option_lacp_rate_set(struct bonding *bond,
1501                                      const struct bond_opt_value *newval)
1502 {
1503         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1504                    newval->string, newval->value);
1505         bond->params.lacp_fast = newval->value;
1506         bond_3ad_update_lacp_rate(bond);
1507
1508         return 0;
1509 }
1510
1511 static int bond_option_ad_select_set(struct bonding *bond,
1512                                      const struct bond_opt_value *newval)
1513 {
1514         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1515                    newval->string, newval->value);
1516         bond->params.ad_select = newval->value;
1517
1518         return 0;
1519 }
1520
1521 static int bond_option_queue_id_set(struct bonding *bond,
1522                                     const struct bond_opt_value *newval)
1523 {
1524         struct slave *slave, *update_slave;
1525         struct net_device *sdev;
1526         struct list_head *iter;
1527         char *delim;
1528         int ret = 0;
1529         u16 qid;
1530
1531         /* delim will point to queue id if successful */
1532         delim = strchr(newval->string, ':');
1533         if (!delim)
1534                 goto err_no_cmd;
1535
1536         /* Terminate string that points to device name and bump it
1537          * up one, so we can read the queue id there.
1538          */
1539         *delim = '\0';
1540         if (sscanf(++delim, "%hd\n", &qid) != 1)
1541                 goto err_no_cmd;
1542
1543         /* Check buffer length, valid ifname and queue id */
1544         if (!dev_valid_name(newval->string) ||
1545             qid > bond->dev->real_num_tx_queues)
1546                 goto err_no_cmd;
1547
1548         /* Get the pointer to that interface if it exists */
1549         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1550         if (!sdev)
1551                 goto err_no_cmd;
1552
1553         /* Search for thes slave and check for duplicate qids */
1554         update_slave = NULL;
1555         bond_for_each_slave(bond, slave, iter) {
1556                 if (sdev == slave->dev)
1557                         /* We don't need to check the matching
1558                          * slave for dups, since we're overwriting it
1559                          */
1560                         update_slave = slave;
1561                 else if (qid && qid == slave->queue_id) {
1562                         goto err_no_cmd;
1563                 }
1564         }
1565
1566         if (!update_slave)
1567                 goto err_no_cmd;
1568
1569         /* Actually set the qids for the slave */
1570         update_slave->queue_id = qid;
1571
1572 out:
1573         return ret;
1574
1575 err_no_cmd:
1576         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1577         ret = -EPERM;
1578         goto out;
1579
1580 }
1581
1582 static int bond_option_slaves_set(struct bonding *bond,
1583                                   const struct bond_opt_value *newval)
1584 {
1585         char command[IFNAMSIZ + 1] = { 0, };
1586         struct net_device *dev;
1587         char *ifname;
1588         int ret;
1589
1590         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1591         ifname = command + 1;
1592         if ((strlen(command) <= 1) ||
1593             (command[0] != '+' && command[0] != '-') ||
1594             !dev_valid_name(ifname))
1595                 goto err_no_cmd;
1596
1597         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1598         if (!dev) {
1599                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1600                            ifname);
1601                 ret = -ENODEV;
1602                 goto out;
1603         }
1604
1605         switch (command[0]) {
1606         case '+':
1607                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1608                 ret = bond_enslave(bond->dev, dev, NULL);
1609                 break;
1610
1611         case '-':
1612                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1613                 ret = bond_release(bond->dev, dev);
1614                 break;
1615
1616         default:
1617                 /* should not run here. */
1618                 goto err_no_cmd;
1619         }
1620
1621 out:
1622         return ret;
1623
1624 err_no_cmd:
1625         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1626         ret = -EPERM;
1627         goto out;
1628 }
1629
1630 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1631                                           const struct bond_opt_value *newval)
1632 {
1633         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1634                    newval->string, newval->value);
1635         bond->params.tlb_dynamic_lb = newval->value;
1636
1637         return 0;
1638 }
1639
1640 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1641                                              const struct bond_opt_value *newval)
1642 {
1643         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1644                    newval->value);
1645
1646         bond->params.ad_actor_sys_prio = newval->value;
1647         bond_3ad_update_ad_actor_settings(bond);
1648
1649         return 0;
1650 }
1651
1652 static int bond_option_ad_actor_system_set(struct bonding *bond,
1653                                            const struct bond_opt_value *newval)
1654 {
1655         u8 macaddr[ETH_ALEN];
1656         u8 *mac;
1657
1658         if (newval->string) {
1659                 if (!mac_pton(newval->string, macaddr))
1660                         goto err;
1661                 mac = macaddr;
1662         } else {
1663                 mac = (u8 *)&newval->value;
1664         }
1665
1666         if (is_multicast_ether_addr(mac))
1667                 goto err;
1668
1669         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1670         ether_addr_copy(bond->params.ad_actor_system, mac);
1671         bond_3ad_update_ad_actor_settings(bond);
1672
1673         return 0;
1674
1675 err:
1676         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1677         return -EINVAL;
1678 }
1679
1680 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1681                                             const struct bond_opt_value *newval)
1682 {
1683         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1684                    newval->value);
1685
1686         bond->params.ad_user_port_key = newval->value;
1687         return 0;
1688 }