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