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         return 0;
 881 }
 882
 883 static int bond_option_active_slave_set(struct bonding *bond,
 884                                         const struct bond_opt_value *newval)
 885 {
 886         char ifname[IFNAMSIZ] = { 0, };
 887         struct net_device *slave_dev;
 888         int ret = 0;
 889
 890         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 891         if (!strlen(ifname) || newval->string[0] == '\n') {
 892                 slave_dev = NULL;
 893         } else {
 894                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 895                 if (!slave_dev)
 896                         return -ENODEV;
 897         }
 898
 899         if (slave_dev) {
 900                 if (!netif_is_bond_slave(slave_dev)) {
 901                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 902                         return -EINVAL;
 903                 }
 904
 905                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 906                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 907                         return -EINVAL;
 908                 }
 909         }
 910
 911         block_netpoll_tx();
 912         /* check to see if we are clearing active */
 913         if (!slave_dev) {
 914                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 915                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 916                 bond_select_active_slave(bond);
 917         } else {
 918                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 919                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 920
 921                 BUG_ON(!new_active);
 922
 923                 if (new_active == old_active) {
 924                         /* do nothing */
 925                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 926                 } else {
 927                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 928                             bond_slave_is_up(new_active)) {
 929                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 930                                 bond_change_active_slave(bond, new_active);
 931                         } else {
 932                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 933                                           new_active->dev->name);
 934                                 ret = -EINVAL;
 935                         }
 936                 }
 937         }
 938         unblock_netpoll_tx();
 939
 940         return ret;
 941 }
 942
 943 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 944  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 945  * start it.
 946  */
 947 static int bond_option_miimon_set(struct bonding *bond,
 948                                   const struct bond_opt_value *newval)
 949 {
 950         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 951                    newval->value);
 952         bond->params.miimon = newval->value;
 953         if (bond->params.updelay)
 954                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 955                            bond->params.updelay * bond->params.miimon);
 956         if (bond->params.downdelay)
 957                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 958                            bond->params.downdelay * bond->params.miimon);
 959         if (bond->params.peer_notif_delay)
 960                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 961                            bond->params.peer_notif_delay * bond->params.miimon);
 962         if (newval->value && bond->params.arp_interval) {
 963                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 964                 bond->params.arp_interval = 0;
 965                 if (bond->params.arp_validate)
 966                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 967         }
 968         if (bond->dev->flags & IFF_UP) {
 969                 /* If the interface is up, we may need to fire off
 970                  * the MII timer. If the interface is down, the
 971                  * timer will get fired off when the open function
 972                  * is called.
 973                  */
 974                 if (!newval->value) {
 975                         cancel_delayed_work_sync(&bond->mii_work);
 976                 } else {
 977                         cancel_delayed_work_sync(&bond->arp_work);
 978                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 979                 }
 980         }
 981
 982         return 0;
 983 }
 984
 985 /* Set up, down and peer notification delays. These must be multiples
 986  * of the MII monitoring value, and are stored internally as the
 987  * multiplier. Thus, we must translate to MS for the real world.
 988  */
 989 static int _bond_option_delay_set(struct bonding *bond,
 990                                   const struct bond_opt_value *newval,
 991                                   const char *name,
 992                                   int *target)
 993 {
 994         int value = newval->value;
 995
 996         if (!bond->params.miimon) {
 997                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
 998                            name);
 999                 return -EPERM;
1000         }
1001         if ((value % bond->params.miimon) != 0) {
1002                 netdev_warn(bond->dev,
1003                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1004                             name,
1005                             value, bond->params.miimon,
1006                             (value / bond->params.miimon) *
1007                             bond->params.miimon);
1008         }
1009         *target = value / bond->params.miimon;
1010         netdev_dbg(bond->dev, "Setting %s to %d\n",
1011                    name,
1012                    *target * bond->params.miimon);
1013
1014         return 0;
1015 }
1016
1017 static int bond_option_updelay_set(struct bonding *bond,
1018                                    const struct bond_opt_value *newval)
1019 {
1020         return _bond_option_delay_set(bond, newval, "up delay",
1021                                       &bond->params.updelay);
1022 }
1023
1024 static int bond_option_downdelay_set(struct bonding *bond,
1025                                      const struct bond_opt_value *newval)
1026 {
1027         return _bond_option_delay_set(bond, newval, "down delay",
1028                                       &bond->params.downdelay);
1029 }
1030
1031 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1032                                             const struct bond_opt_value *newval)
1033 {
1034         int ret = _bond_option_delay_set(bond, newval,
1035                                          "peer notification delay",
1036                                          &bond->params.peer_notif_delay);
1037         return ret;
1038 }
1039
1040 static int bond_option_use_carrier_set(struct bonding *bond,
1041                                        const struct bond_opt_value *newval)
1042 {
1043         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1044                    newval->value);
1045         bond->params.use_carrier = newval->value;
1046
1047         return 0;
1048 }
1049
1050 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
1051  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
1052  * we must start it.
1053  */
1054 static int bond_option_arp_interval_set(struct bonding *bond,
1055                                         const struct bond_opt_value *newval)
1056 {
1057         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1058                    newval->value);
1059         bond->params.arp_interval = newval->value;
1060         if (newval->value) {
1061                 if (bond->params.miimon) {
1062                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1063                         bond->params.miimon = 0;
1064                 }
1065                 if (!bond->params.arp_targets[0])
1066                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1067         }
1068         if (bond->dev->flags & IFF_UP) {
1069                 /* If the interface is up, we may need to fire off
1070                  * the ARP timer.  If the interface is down, the
1071                  * timer will get fired off when the open function
1072                  * is called.
1073                  */
1074                 if (!newval->value) {
1075                         if (bond->params.arp_validate)
1076                                 bond->recv_probe = NULL;
1077                         cancel_delayed_work_sync(&bond->arp_work);
1078                 } else {
1079                         /* arp_validate can be set only in active-backup mode */
1080                         bond->recv_probe = bond_rcv_validate;
1081                         cancel_delayed_work_sync(&bond->mii_work);
1082                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
1083                 }
1084         }
1085
1086         return 0;
1087 }
1088
1089 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1090                                             __be32 target,
1091                                             unsigned long last_rx)
1092 {
1093         __be32 *targets = bond->params.arp_targets;
1094         struct list_head *iter;
1095         struct slave *slave;
1096
1097         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1098                 bond_for_each_slave(bond, slave, iter)
1099                         slave->target_last_arp_rx[slot] = last_rx;
1100                 targets[slot] = target;
1101         }
1102 }
1103
1104 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1105 {
1106         __be32 *targets = bond->params.arp_targets;
1107         int ind;
1108
1109         if (!bond_is_ip_target_ok(target)) {
1110                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1111                            &target);
1112                 return -EINVAL;
1113         }
1114
1115         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1116                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1117                            &target);
1118                 return -EINVAL;
1119         }
1120
1121         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1122         if (ind == -1) {
1123                 netdev_err(bond->dev, "ARP target table is full!\n");
1124                 return -EINVAL;
1125         }
1126
1127         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1128
1129         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1130
1131         return 0;
1132 }
1133
1134 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1135 {
1136         return _bond_option_arp_ip_target_add(bond, target);
1137 }
1138
1139 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1140 {
1141         __be32 *targets = bond->params.arp_targets;
1142         struct list_head *iter;
1143         struct slave *slave;
1144         unsigned long *targets_rx;
1145         int ind, i;
1146
1147         if (!bond_is_ip_target_ok(target)) {
1148                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1149                            &target);
1150                 return -EINVAL;
1151         }
1152
1153         ind = bond_get_targets_ip(targets, target);
1154         if (ind == -1) {
1155                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1156                            &target);
1157                 return -EINVAL;
1158         }
1159
1160         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1161                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1162
1163         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1164
1165         bond_for_each_slave(bond, slave, iter) {
1166                 targets_rx = slave->target_last_arp_rx;
1167                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1168                         targets_rx[i] = targets_rx[i+1];
1169                 targets_rx[i] = 0;
1170         }
1171         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1172                 targets[i] = targets[i+1];
1173         targets[i] = 0;
1174
1175         return 0;
1176 }
1177
1178 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1179 {
1180         int i;
1181
1182         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1183                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1184 }
1185
1186 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1187                                           const struct bond_opt_value *newval)
1188 {
1189         int ret = -EPERM;
1190         __be32 target;
1191
1192         if (newval->string) {
1193                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1194                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1195                                    &target);
1196                         return ret;
1197                 }
1198                 if (newval->string[0] == '+')
1199                         ret = bond_option_arp_ip_target_add(bond, target);
1200                 else if (newval->string[0] == '-')
1201                         ret = bond_option_arp_ip_target_rem(bond, target);
1202                 else
1203                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1204         } else {
1205                 target = newval->value;
1206                 ret = bond_option_arp_ip_target_add(bond, target);
1207         }
1208
1209         return ret;
1210 }
1211
1212 #if IS_ENABLED(CONFIG_IPV6)
1213 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1214                                             struct in6_addr *target,
1215                                             unsigned long last_rx)
1216 {
1217         struct in6_addr *targets = bond->params.ns_targets;
1218         struct list_head *iter;
1219         struct slave *slave;
1220
1221         if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1222                 bond_for_each_slave(bond, slave, iter)
1223                         slave->target_last_arp_rx[slot] = last_rx;
1224                 targets[slot] = *target;
1225         }
1226 }
1227
1228 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1229 {
1230         struct in6_addr addr_any = in6addr_any;
1231         int i;
1232
1233         for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1234                 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1235 }
1236
1237 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1238                                           const struct bond_opt_value *newval)
1239 {
1240         struct in6_addr *target = (struct in6_addr *)newval->extra;
1241         struct in6_addr *targets = bond->params.ns_targets;
1242         struct in6_addr addr_any = in6addr_any;
1243         int index;
1244
1245         if (!bond_is_ip6_target_ok(target)) {
1246                 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1247                            target);
1248                 return -EINVAL;
1249         }
1250
1251         if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1252                 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1253                            target);
1254                 return -EINVAL;
1255         }
1256
1257         index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1258         if (index == -1) {
1259                 netdev_err(bond->dev, "NS target table is full!\n");
1260                 return -EINVAL;
1261         }
1262
1263         netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1264
1265         _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1266
1267         return 0;
1268 }
1269 #else
1270 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1271                                           const struct bond_opt_value *newval)
1272 {
1273         return -EPERM;
1274 }
1275 #endif
1276
1277 static int bond_option_arp_validate_set(struct bonding *bond,
1278                                         const struct bond_opt_value *newval)
1279 {
1280         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1281                    newval->string, newval->value);
1282         bond->params.arp_validate = newval->value;
1283
1284         return 0;
1285 }
1286
1287 static int bond_option_arp_all_targets_set(struct bonding *bond,
1288                                            const struct bond_opt_value *newval)
1289 {
1290         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1291                    newval->string, newval->value);
1292         bond->params.arp_all_targets = newval->value;
1293
1294         return 0;
1295 }
1296
1297 static int bond_option_missed_max_set(struct bonding *bond,
1298                                       const struct bond_opt_value *newval)
1299 {
1300         netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1301                    newval->string, newval->value);
1302         bond->params.missed_max = newval->value;
1303
1304         return 0;
1305 }
1306
1307 static int bond_option_prio_set(struct bonding *bond,
1308                                 const struct bond_opt_value *newval)
1309 {
1310         struct slave *slave;
1311
1312         slave = bond_slave_get_rtnl(newval->slave_dev);
1313         if (!slave) {
1314                 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1315                 return -ENODEV;
1316         }
1317         slave->prio = newval->value;
1318
1319         if (rtnl_dereference(bond->primary_slave))
1320                 slave_warn(bond->dev, slave->dev,
1321                            "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1322         else
1323                 bond_select_active_slave(bond);
1324
1325         return 0;
1326 }
1327
1328 static int bond_option_primary_set(struct bonding *bond,
1329                                    const struct bond_opt_value *newval)
1330 {
1331         char *p, *primary = newval->string;
1332         struct list_head *iter;
1333         struct slave *slave;
1334
1335         block_netpoll_tx();
1336
1337         p = strchr(primary, '\n');
1338         if (p)
1339                 *p = '\0';
1340         /* check to see if we are clearing primary */
1341         if (!strlen(primary)) {
1342                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1343                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1344                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1345                 bond_select_active_slave(bond);
1346                 goto out;
1347         }
1348
1349         bond_for_each_slave(bond, slave, iter) {
1350                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1351                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1352                         rcu_assign_pointer(bond->primary_slave, slave);
1353                         strcpy(bond->params.primary, slave->dev->name);
1354                         bond->force_primary = true;
1355                         bond_select_active_slave(bond);
1356                         goto out;
1357                 }
1358         }
1359
1360         if (rtnl_dereference(bond->primary_slave)) {
1361                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1362                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1363                 bond_select_active_slave(bond);
1364         }
1365         strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1366
1367         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1368                    primary);
1369
1370 out:
1371         unblock_netpoll_tx();
1372
1373         return 0;
1374 }
1375
1376 static int bond_option_primary_reselect_set(struct bonding *bond,
1377                                             const struct bond_opt_value *newval)
1378 {
1379         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1380                    newval->string, newval->value);
1381         bond->params.primary_reselect = newval->value;
1382
1383         block_netpoll_tx();
1384         bond_select_active_slave(bond);
1385         unblock_netpoll_tx();
1386
1387         return 0;
1388 }
1389
1390 static int bond_option_fail_over_mac_set(struct bonding *bond,
1391                                          const struct bond_opt_value *newval)
1392 {
1393         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1394                    newval->string, newval->value);
1395         bond->params.fail_over_mac = newval->value;
1396
1397         return 0;
1398 }
1399
1400 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1401                                             const struct bond_opt_value *newval)
1402 {
1403         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1404                    newval->string, newval->value);
1405         bond->params.xmit_policy = newval->value;
1406
1407         return 0;
1408 }
1409
1410 static int bond_option_resend_igmp_set(struct bonding *bond,
1411                                        const struct bond_opt_value *newval)
1412 {
1413         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1414                    newval->value);
1415         bond->params.resend_igmp = newval->value;
1416
1417         return 0;
1418 }
1419
1420 static int bond_option_num_peer_notif_set(struct bonding *bond,
1421                                    const struct bond_opt_value *newval)
1422 {
1423         bond->params.num_peer_notif = newval->value;
1424
1425         return 0;
1426 }
1427
1428 static int bond_option_all_slaves_active_set(struct bonding *bond,
1429                                              const struct bond_opt_value *newval)
1430 {
1431         struct list_head *iter;
1432         struct slave *slave;
1433
1434         if (newval->value == bond->params.all_slaves_active)
1435                 return 0;
1436         bond->params.all_slaves_active = newval->value;
1437         bond_for_each_slave(bond, slave, iter) {
1438                 if (!bond_is_active_slave(slave)) {
1439                         if (newval->value)
1440                                 slave->inactive = 0;
1441                         else
1442                                 slave->inactive = 1;
1443                 }
1444         }
1445
1446         return 0;
1447 }
1448
1449 static int bond_option_min_links_set(struct bonding *bond,
1450                                      const struct bond_opt_value *newval)
1451 {
1452         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1453                    newval->value);
1454         bond->params.min_links = newval->value;
1455         bond_set_carrier(bond);
1456
1457         return 0;
1458 }
1459
1460 static int bond_option_lp_interval_set(struct bonding *bond,
1461                                        const struct bond_opt_value *newval)
1462 {
1463         bond->params.lp_interval = newval->value;
1464
1465         return 0;
1466 }
1467
1468 static int bond_option_pps_set(struct bonding *bond,
1469                                const struct bond_opt_value *newval)
1470 {
1471         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1472                    newval->value);
1473         bond->params.packets_per_slave = newval->value;
1474         if (newval->value > 0) {
1475                 bond->params.reciprocal_packets_per_slave =
1476                         reciprocal_value(newval->value);
1477         } else {
1478                 /* reciprocal_packets_per_slave is unused if
1479                  * packets_per_slave is 0 or 1, just initialize it
1480                  */
1481                 bond->params.reciprocal_packets_per_slave =
1482                         (struct reciprocal_value) { 0 };
1483         }
1484
1485         return 0;
1486 }
1487
1488 static int bond_option_lacp_active_set(struct bonding *bond,
1489                                        const struct bond_opt_value *newval)
1490 {
1491         netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1492                    newval->string, newval->value);
1493         bond->params.lacp_active = newval->value;
1494
1495         return 0;
1496 }
1497
1498 static int bond_option_lacp_rate_set(struct bonding *bond,
1499                                      const struct bond_opt_value *newval)
1500 {
1501         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1502                    newval->string, newval->value);
1503         bond->params.lacp_fast = newval->value;
1504         bond_3ad_update_lacp_rate(bond);
1505
1506         return 0;
1507 }
1508
1509 static int bond_option_ad_select_set(struct bonding *bond,
1510                                      const struct bond_opt_value *newval)
1511 {
1512         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1513                    newval->string, newval->value);
1514         bond->params.ad_select = newval->value;
1515
1516         return 0;
1517 }
1518
1519 static int bond_option_queue_id_set(struct bonding *bond,
1520                                     const struct bond_opt_value *newval)
1521 {
1522         struct slave *slave, *update_slave;
1523         struct net_device *sdev;
1524         struct list_head *iter;
1525         char *delim;
1526         int ret = 0;
1527         u16 qid;
1528
1529         /* delim will point to queue id if successful */
1530         delim = strchr(newval->string, ':');
1531         if (!delim)
1532                 goto err_no_cmd;
1533
1534         /* Terminate string that points to device name and bump it
1535          * up one, so we can read the queue id there.
1536          */
1537         *delim = '\0';
1538         if (sscanf(++delim, "%hd\n", &qid) != 1)
1539                 goto err_no_cmd;
1540
1541         /* Check buffer length, valid ifname and queue id */
1542         if (!dev_valid_name(newval->string) ||
1543             qid > bond->dev->real_num_tx_queues)
1544                 goto err_no_cmd;
1545
1546         /* Get the pointer to that interface if it exists */
1547         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1548         if (!sdev)
1549                 goto err_no_cmd;
1550
1551         /* Search for thes slave and check for duplicate qids */
1552         update_slave = NULL;
1553         bond_for_each_slave(bond, slave, iter) {
1554                 if (sdev == slave->dev)
1555                         /* We don't need to check the matching
1556                          * slave for dups, since we're overwriting it
1557                          */
1558                         update_slave = slave;
1559                 else if (qid && qid == slave->queue_id) {
1560                         goto err_no_cmd;
1561                 }
1562         }
1563
1564         if (!update_slave)
1565                 goto err_no_cmd;
1566
1567         /* Actually set the qids for the slave */
1568         update_slave->queue_id = qid;
1569
1570 out:
1571         return ret;
1572
1573 err_no_cmd:
1574         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1575         ret = -EPERM;
1576         goto out;
1577
1578 }
1579
1580 static int bond_option_slaves_set(struct bonding *bond,
1581                                   const struct bond_opt_value *newval)
1582 {
1583         char command[IFNAMSIZ + 1] = { 0, };
1584         struct net_device *dev;
1585         char *ifname;
1586         int ret;
1587
1588         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1589         ifname = command + 1;
1590         if ((strlen(command) <= 1) ||
1591             (command[0] != '+' && command[0] != '-') ||
1592             !dev_valid_name(ifname))
1593                 goto err_no_cmd;
1594
1595         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1596         if (!dev) {
1597                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1598                            ifname);
1599                 ret = -ENODEV;
1600                 goto out;
1601         }
1602
1603         switch (command[0]) {
1604         case '+':
1605                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1606                 ret = bond_enslave(bond->dev, dev, NULL);
1607                 break;
1608
1609         case '-':
1610                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1611                 ret = bond_release(bond->dev, dev);
1612                 break;
1613
1614         default:
1615                 /* should not run here. */
1616                 goto err_no_cmd;
1617         }
1618
1619 out:
1620         return ret;
1621
1622 err_no_cmd:
1623         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1624         ret = -EPERM;
1625         goto out;
1626 }
1627
1628 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1629                                           const struct bond_opt_value *newval)
1630 {
1631         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1632                    newval->string, newval->value);
1633         bond->params.tlb_dynamic_lb = newval->value;
1634
1635         return 0;
1636 }
1637
1638 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1639                                              const struct bond_opt_value *newval)
1640 {
1641         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1642                    newval->value);
1643
1644         bond->params.ad_actor_sys_prio = newval->value;
1645         bond_3ad_update_ad_actor_settings(bond);
1646
1647         return 0;
1648 }
1649
1650 static int bond_option_ad_actor_system_set(struct bonding *bond,
1651                                            const struct bond_opt_value *newval)
1652 {
1653         u8 macaddr[ETH_ALEN];
1654         u8 *mac;
1655
1656         if (newval->string) {
1657                 if (!mac_pton(newval->string, macaddr))
1658                         goto err;
1659                 mac = macaddr;
1660         } else {
1661                 mac = (u8 *)&newval->value;
1662         }
1663
1664         if (is_multicast_ether_addr(mac))
1665                 goto err;
1666
1667         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1668         ether_addr_copy(bond->params.ad_actor_system, mac);
1669         bond_3ad_update_ad_actor_settings(bond);
1670
1671         return 0;
1672
1673 err:
1674         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1675         return -EINVAL;
1676 }
1677
1678 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1679                                             const struct bond_opt_value *newval)
1680 {
1681         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1682                    newval->value);
1683
1684         bond->params.ad_user_port_key = newval->value;
1685         return 0;
1686 }