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_peer_notif_delay_tbl[] = {
 173         { "off",     0,   0},
 174         { "maxval",  300000, BOND_VALFLAG_MAX},
 175         { NULL,      -1,  0}
 176 };
 177
 178 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 179         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 180         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 181         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 182         { NULL,      -1},
 183 };
 184
 185 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 186         { "off", 0,  0},
 187         { "on",  1,  BOND_VALFLAG_DEFAULT},
 188         { NULL,  -1, 0}
 189 };
 190
 191 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 192         { "off", 0,  BOND_VALFLAG_DEFAULT},
 193         { "on",  1,  0},
 194         { NULL,  -1, 0}
 195 };
 196
 197 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 198         { "off",     0,   0},
 199         { "maxval",  255, BOND_VALFLAG_MAX},
 200         { "default", 1,   BOND_VALFLAG_DEFAULT},
 201         { NULL,      -1,  0}
 202 };
 203
 204 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 205         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 206         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 207         { NULL,      -1,      0},
 208 };
 209
 210 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 211         { "off", 0,  0},
 212         { "on",  1,  BOND_VALFLAG_DEFAULT},
 213         { NULL,  -1, 0}
 214 };
 215
 216 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 217         { "minval",  1,     BOND_VALFLAG_MIN},
 218         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 219         { NULL,      -1,    0},
 220 };
 221
 222 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 223         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 224         { "maxval",  1023,  BOND_VALFLAG_MAX},
 225         { NULL,      -1,    0},
 226 };
 227
 228 static const struct bond_opt_value bond_missed_max_tbl[] = {
 229         { "minval",     1,      BOND_VALFLAG_MIN},
 230         { "maxval",     255,    BOND_VALFLAG_MAX},
 231         { "default",    2,      BOND_VALFLAG_DEFAULT},
 232         { NULL,         -1,     0},
 233 };
 234
 235 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 236         [BOND_OPT_MODE] = {
 237                 .id = BOND_OPT_MODE,
 238                 .name = "mode",
 239                 .desc = "bond device mode",
 240                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 241                 .values = bond_mode_tbl,
 242                 .set = bond_option_mode_set
 243         },
 244         [BOND_OPT_PACKETS_PER_SLAVE] = {
 245                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 246                 .name = "packets_per_slave",
 247                 .desc = "Packets to send per slave in RR mode",
 248                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 249                 .values = bond_pps_tbl,
 250                 .set = bond_option_pps_set
 251         },
 252         [BOND_OPT_XMIT_HASH] = {
 253                 .id = BOND_OPT_XMIT_HASH,
 254                 .name = "xmit_hash_policy",
 255                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 256                 .values = bond_xmit_hashtype_tbl,
 257                 .set = bond_option_xmit_hash_policy_set
 258         },
 259         [BOND_OPT_ARP_VALIDATE] = {
 260                 .id = BOND_OPT_ARP_VALIDATE,
 261                 .name = "arp_validate",
 262                 .desc = "validate src/dst of ARP probes",
 263                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 264                                BIT(BOND_MODE_ALB),
 265                 .values = bond_arp_validate_tbl,
 266                 .set = bond_option_arp_validate_set
 267         },
 268         [BOND_OPT_ARP_ALL_TARGETS] = {
 269                 .id = BOND_OPT_ARP_ALL_TARGETS,
 270                 .name = "arp_all_targets",
 271                 .desc = "fail on any/all arp targets timeout",
 272                 .values = bond_arp_all_targets_tbl,
 273                 .set = bond_option_arp_all_targets_set
 274         },
 275         [BOND_OPT_FAIL_OVER_MAC] = {
 276                 .id = BOND_OPT_FAIL_OVER_MAC,
 277                 .name = "fail_over_mac",
 278                 .desc = "For active-backup, do not set all slaves to the same MAC",
 279                 .flags = BOND_OPTFLAG_NOSLAVES,
 280                 .values = bond_fail_over_mac_tbl,
 281                 .set = bond_option_fail_over_mac_set
 282         },
 283         [BOND_OPT_ARP_INTERVAL] = {
 284                 .id = BOND_OPT_ARP_INTERVAL,
 285                 .name = "arp_interval",
 286                 .desc = "arp interval in milliseconds",
 287                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 288                                BIT(BOND_MODE_ALB),
 289                 .values = bond_intmax_tbl,
 290                 .set = bond_option_arp_interval_set
 291         },
 292         [BOND_OPT_MISSED_MAX] = {
 293                 .id = BOND_OPT_MISSED_MAX,
 294                 .name = "arp_missed_max",
 295                 .desc = "Maximum number of missed ARP interval",
 296                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 297                                BIT(BOND_MODE_ALB),
 298                 .values = bond_missed_max_tbl,
 299                 .set = bond_option_missed_max_set
 300         },
 301         [BOND_OPT_ARP_TARGETS] = {
 302                 .id = BOND_OPT_ARP_TARGETS,
 303                 .name = "arp_ip_target",
 304                 .desc = "arp targets in n.n.n.n form",
 305                 .flags = BOND_OPTFLAG_RAWVAL,
 306                 .set = bond_option_arp_ip_targets_set
 307         },
 308         [BOND_OPT_NS_TARGETS] = {
 309                 .id = BOND_OPT_NS_TARGETS,
 310                 .name = "ns_ip6_target",
 311                 .desc = "NS targets in ffff:ffff::ffff:ffff form",
 312                 .flags = BOND_OPTFLAG_RAWVAL,
 313                 .set = bond_option_ns_ip6_targets_set
 314         },
 315         [BOND_OPT_DOWNDELAY] = {
 316                 .id = BOND_OPT_DOWNDELAY,
 317                 .name = "downdelay",
 318                 .desc = "Delay before considering link down, in milliseconds",
 319                 .values = bond_intmax_tbl,
 320                 .set = bond_option_downdelay_set
 321         },
 322         [BOND_OPT_UPDELAY] = {
 323                 .id = BOND_OPT_UPDELAY,
 324                 .name = "updelay",
 325                 .desc = "Delay before considering link up, in milliseconds",
 326                 .values = bond_intmax_tbl,
 327                 .set = bond_option_updelay_set
 328         },
 329         [BOND_OPT_LACP_ACTIVE] = {
 330                 .id = BOND_OPT_LACP_ACTIVE,
 331                 .name = "lacp_active",
 332                 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
 333                 .flags = BOND_OPTFLAG_IFDOWN,
 334                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 335                 .values = bond_lacp_active,
 336                 .set = bond_option_lacp_active_set
 337         },
 338         [BOND_OPT_LACP_RATE] = {
 339                 .id = BOND_OPT_LACP_RATE,
 340                 .name = "lacp_rate",
 341                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 342                 .flags = BOND_OPTFLAG_IFDOWN,
 343                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 344                 .values = bond_lacp_rate_tbl,
 345                 .set = bond_option_lacp_rate_set
 346         },
 347         [BOND_OPT_MINLINKS] = {
 348                 .id = BOND_OPT_MINLINKS,
 349                 .name = "min_links",
 350                 .desc = "Minimum number of available links before turning on carrier",
 351                 .values = bond_intmax_tbl,
 352                 .set = bond_option_min_links_set
 353         },
 354         [BOND_OPT_AD_SELECT] = {
 355                 .id = BOND_OPT_AD_SELECT,
 356                 .name = "ad_select",
 357                 .desc = "803.ad aggregation selection logic",
 358                 .flags = BOND_OPTFLAG_IFDOWN,
 359                 .values = bond_ad_select_tbl,
 360                 .set = bond_option_ad_select_set
 361         },
 362         [BOND_OPT_NUM_PEER_NOTIF] = {
 363                 .id = BOND_OPT_NUM_PEER_NOTIF,
 364                 .name = "num_unsol_na",
 365                 .desc = "Number of peer notifications to send on failover event",
 366                 .values = bond_num_peer_notif_tbl,
 367                 .set = bond_option_num_peer_notif_set
 368         },
 369         [BOND_OPT_MIIMON] = {
 370                 .id = BOND_OPT_MIIMON,
 371                 .name = "miimon",
 372                 .desc = "Link check interval in milliseconds",
 373                 .values = bond_intmax_tbl,
 374                 .set = bond_option_miimon_set
 375         },
 376         [BOND_OPT_PRIO] = {
 377                 .id = BOND_OPT_PRIO,
 378                 .name = "prio",
 379                 .desc = "Link priority for failover re-selection",
 380                 .flags = BOND_OPTFLAG_RAWVAL,
 381                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 382                                                 BIT(BOND_MODE_TLB) |
 383                                                 BIT(BOND_MODE_ALB)),
 384                 .set = bond_option_prio_set
 385         },
 386         [BOND_OPT_PRIMARY] = {
 387                 .id = BOND_OPT_PRIMARY,
 388                 .name = "primary",
 389                 .desc = "Primary network device to use",
 390                 .flags = BOND_OPTFLAG_RAWVAL,
 391                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 392                                                 BIT(BOND_MODE_TLB) |
 393                                                 BIT(BOND_MODE_ALB)),
 394                 .set = bond_option_primary_set
 395         },
 396         [BOND_OPT_PRIMARY_RESELECT] = {
 397                 .id = BOND_OPT_PRIMARY_RESELECT,
 398                 .name = "primary_reselect",
 399                 .desc = "Reselect primary slave once it comes up",
 400                 .values = bond_primary_reselect_tbl,
 401                 .set = bond_option_primary_reselect_set
 402         },
 403         [BOND_OPT_USE_CARRIER] = {
 404                 .id = BOND_OPT_USE_CARRIER,
 405                 .name = "use_carrier",
 406                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 407                 .values = bond_use_carrier_tbl,
 408                 .set = bond_option_use_carrier_set
 409         },
 410         [BOND_OPT_ACTIVE_SLAVE] = {
 411                 .id = BOND_OPT_ACTIVE_SLAVE,
 412                 .name = "active_slave",
 413                 .desc = "Currently active slave",
 414                 .flags = BOND_OPTFLAG_RAWVAL,
 415                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 416                                                 BIT(BOND_MODE_TLB) |
 417                                                 BIT(BOND_MODE_ALB)),
 418                 .set = bond_option_active_slave_set
 419         },
 420         [BOND_OPT_QUEUE_ID] = {
 421                 .id = BOND_OPT_QUEUE_ID,
 422                 .name = "queue_id",
 423                 .desc = "Set queue id of a slave",
 424                 .flags = BOND_OPTFLAG_RAWVAL,
 425                 .set = bond_option_queue_id_set
 426         },
 427         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 428                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 429                 .name = "all_slaves_active",
 430                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 431                 .values = bond_all_slaves_active_tbl,
 432                 .set = bond_option_all_slaves_active_set
 433         },
 434         [BOND_OPT_RESEND_IGMP] = {
 435                 .id = BOND_OPT_RESEND_IGMP,
 436                 .name = "resend_igmp",
 437                 .desc = "Number of IGMP membership reports to send on link failure",
 438                 .values = bond_resend_igmp_tbl,
 439                 .set = bond_option_resend_igmp_set
 440         },
 441         [BOND_OPT_LP_INTERVAL] = {
 442                 .id = BOND_OPT_LP_INTERVAL,
 443                 .name = "lp_interval",
 444                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 445                 .values = bond_lp_interval_tbl,
 446                 .set = bond_option_lp_interval_set
 447         },
 448         [BOND_OPT_SLAVES] = {
 449                 .id = BOND_OPT_SLAVES,
 450                 .name = "slaves",
 451                 .desc = "Slave membership management",
 452                 .flags = BOND_OPTFLAG_RAWVAL,
 453                 .set = bond_option_slaves_set
 454         },
 455         [BOND_OPT_TLB_DYNAMIC_LB] = {
 456                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 457                 .name = "tlb_dynamic_lb",
 458                 .desc = "Enable dynamic flow shuffling",
 459                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
 460                 .values = bond_tlb_dynamic_lb_tbl,
 461                 .flags = BOND_OPTFLAG_IFDOWN,
 462                 .set = bond_option_tlb_dynamic_lb_set,
 463         },
 464         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 465                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 466                 .name = "ad_actor_sys_prio",
 467                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 468                 .values = bond_ad_actor_sys_prio_tbl,
 469                 .set = bond_option_ad_actor_sys_prio_set,
 470         },
 471         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 472                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 473                 .name = "ad_actor_system",
 474                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 475                 .flags = BOND_OPTFLAG_RAWVAL,
 476                 .set = bond_option_ad_actor_system_set,
 477         },
 478         [BOND_OPT_AD_USER_PORT_KEY] = {
 479                 .id = BOND_OPT_AD_USER_PORT_KEY,
 480                 .name = "ad_user_port_key",
 481                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 482                 .flags = BOND_OPTFLAG_IFDOWN,
 483                 .values = bond_ad_user_port_key_tbl,
 484                 .set = bond_option_ad_user_port_key_set,
 485         },
 486         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 487                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 488                 .name = "num_grat_arp",
 489                 .desc = "Number of peer notifications to send on failover event",
 490                 .values = bond_num_peer_notif_tbl,
 491                 .set = bond_option_num_peer_notif_set
 492         },
 493         [BOND_OPT_PEER_NOTIF_DELAY] = {
 494                 .id = BOND_OPT_PEER_NOTIF_DELAY,
 495                 .name = "peer_notif_delay",
 496                 .desc = "Delay between each peer notification on failover event, in milliseconds",
 497                 .values = bond_peer_notif_delay_tbl,
 498                 .set = bond_option_peer_notif_delay_set
 499         }
 500 };
 501
 502 /* Searches for an option by name */
 503 const struct bond_option *bond_opt_get_by_name(const char *name)
 504 {
 505         const struct bond_option *opt;
 506         int option;
 507
 508         for (option = 0; option < BOND_OPT_LAST; option++) {
 509                 opt = bond_opt_get(option);
 510                 if (opt && !strcmp(opt->name, name))
 511                         return opt;
 512         }
 513
 514         return NULL;
 515 }
 516
 517 /* Searches for a value in opt's values[] table */
 518 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 519 {
 520         const struct bond_option *opt;
 521         int i;
 522
 523         opt = bond_opt_get(option);
 524         if (WARN_ON(!opt))
 525                 return NULL;
 526         for (i = 0; opt->values && opt->values[i].string; i++)
 527                 if (opt->values[i].value == val)
 528                         return &opt->values[i];
 529
 530         return NULL;
 531 }
 532
 533 /* Searches for a value in opt's values[] table which matches the flagmask */
 534 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 535                                                        u32 flagmask)
 536 {
 537         int i;
 538
 539         for (i = 0; opt->values && opt->values[i].string; i++)
 540                 if (opt->values[i].flags & flagmask)
 541                         return &opt->values[i];
 542
 543         return NULL;
 544 }
 545
 546 /* If maxval is missing then there's no range to check. In case minval is
 547  * missing then it's considered to be 0.
 548  */
 549 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 550 {
 551         const struct bond_opt_value *minval, *maxval;
 552
 553         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 554         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 555         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 556                 return false;
 557
 558         return true;
 559 }
 560
 561 /**
 562  * bond_opt_parse - parse option value
 563  * @opt: the option to parse against
 564  * @val: value to parse
 565  *
 566  * This function tries to extract the value from @val and check if it's
 567  * a possible match for the option and returns NULL if a match isn't found,
 568  * or the struct_opt_value that matched. It also strips the new line from
 569  * @val->string if it's present.
 570  */
 571 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 572                                             struct bond_opt_value *val)
 573 {
 574         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 575         const struct bond_opt_value *tbl;
 576         const struct bond_opt_value *ret = NULL;
 577         bool checkval;
 578         int i, rv;
 579
 580         /* No parsing if the option wants a raw val */
 581         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 582                 return val;
 583
 584         tbl = opt->values;
 585         if (!tbl)
 586                 goto out;
 587
 588         /* ULLONG_MAX is used to bypass string processing */
 589         checkval = val->value != ULLONG_MAX;
 590         if (!checkval) {
 591                 if (!val->string)
 592                         goto out;
 593                 p = strchr(val->string, '\n');
 594                 if (p)
 595                         *p = '\0';
 596                 for (p = val->string; *p; p++)
 597                         if (!(isdigit(*p) || isspace(*p)))
 598                                 break;
 599                 /* The following code extracts the string to match or the value
 600                  * and sets checkval appropriately
 601                  */
 602                 if (*p) {
 603                         rv = sscanf(val->string, "%32s", valstr);
 604                 } else {
 605                         rv = sscanf(val->string, "%llu", &val->value);
 606                         checkval = true;
 607                 }
 608                 if (!rv)
 609                         goto out;
 610         }
 611
 612         for (i = 0; tbl[i].string; i++) {
 613                 /* Check for exact match */
 614                 if (checkval) {
 615                         if (val->value == tbl[i].value)
 616                                 ret = &tbl[i];
 617                 } else {
 618                         if (!strcmp(valstr, "default") &&
 619                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 620                                 ret = &tbl[i];
 621
 622                         if (!strcmp(valstr, tbl[i].string))
 623                                 ret = &tbl[i];
 624                 }
 625                 /* Found an exact match */
 626                 if (ret)
 627                         goto out;
 628         }
 629         /* Possible range match */
 630         if (checkval && bond_opt_check_range(opt, val->value))
 631                 ret = val;
 632 out:
 633         return ret;
 634 }
 635
 636 /* Check opt's dependencies against bond mode and currently set options */
 637 static int bond_opt_check_deps(struct bonding *bond,
 638                                const struct bond_option *opt)
 639 {
 640         struct bond_params *params = &bond->params;
 641
 642         if (test_bit(params->mode, &opt->unsuppmodes))
 643                 return -EACCES;
 644         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 645                 return -ENOTEMPTY;
 646         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 647                 return -EBUSY;
 648
 649         return 0;
 650 }
 651
 652 static void bond_opt_dep_print(struct bonding *bond,
 653                                const struct bond_option *opt,
 654                                struct nlattr *bad_attr,
 655                                struct netlink_ext_ack *extack)
 656 {
 657         const struct bond_opt_value *modeval;
 658         struct bond_params *params;
 659
 660         params = &bond->params;
 661         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 662         if (test_bit(params->mode, &opt->unsuppmodes)) {
 663                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 664                            opt->name, modeval->string, modeval->value);
 665                 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 666                                     "option not supported in mode");
 667         }
 668 }
 669
 670 static void bond_opt_error_interpret(struct bonding *bond,
 671                                      const struct bond_option *opt,
 672                                      int error, const struct bond_opt_value *val,
 673                                      struct nlattr *bad_attr,
 674                                      struct netlink_ext_ack *extack)
 675 {
 676         const struct bond_opt_value *minval, *maxval;
 677         char *p;
 678
 679         switch (error) {
 680         case -EINVAL:
 681                 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
 682                 if (val) {
 683                         if (val->string) {
 684                                 /* sometimes RAWVAL opts may have new lines */
 685                                 p = strchr(val->string, '\n');
 686                                 if (p)
 687                                         *p = '\0';
 688                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 689                                            opt->name, val->string);
 690                         } else {
 691                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 692                                            opt->name, val->value);
 693                         }
 694                 }
 695                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 696                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 697                 if (!maxval)
 698                         break;
 699                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 700                            opt->name, minval ? minval->value : 0, maxval->value);
 701                 break;
 702         case -EACCES:
 703                 bond_opt_dep_print(bond, opt, bad_attr, extack);
 704                 break;
 705         case -ENOTEMPTY:
 706                 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 707                                     "unable to set option because the bond device has slaves");
 708                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 709                            opt->name);
 710                 break;
 711         case -EBUSY:
 712                 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 713                                     "unable to set option because the bond is up");
 714                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 715                            opt->name);
 716                 break;
 717         case -ENODEV:
 718                 if (val && val->string) {
 719                         p = strchr(val->string, '\n');
 720                         if (p)
 721                                 *p = '\0';
 722                         netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
 723                                    opt->name, val->string);
 724                         NL_SET_ERR_MSG_ATTR(extack, bad_attr,
 725                                             "interface does not exist");
 726                 }
 727                 break;
 728         default:
 729                 break;
 730         }
 731 }
 732
 733 /**
 734  * __bond_opt_set - set a bonding option
 735  * @bond: target bond device
 736  * @option: option to set
 737  * @val: value to set it to
 738  * @bad_attr: netlink attribue that caused the error
 739  * @extack: extended netlink error structure, used when an error message
 740  *          needs to be returned to the caller via netlink
 741  *
 742  * This function is used to change the bond's option value, it can be
 743  * used for both enabling/changing an option and for disabling it. RTNL lock
 744  * must be obtained before calling this function.
 745  */
 746 int __bond_opt_set(struct bonding *bond,
 747                    unsigned int option, struct bond_opt_value *val,
 748                    struct nlattr *bad_attr, struct netlink_ext_ack *extack)
 749 {
 750         const struct bond_opt_value *retval = NULL;
 751         const struct bond_option *opt;
 752         int ret = -ENOENT;
 753
 754         ASSERT_RTNL();
 755
 756         opt = bond_opt_get(option);
 757         if (WARN_ON(!val) || WARN_ON(!opt))
 758                 goto out;
 759         ret = bond_opt_check_deps(bond, opt);
 760         if (ret)
 761                 goto out;
 762         retval = bond_opt_parse(opt, val);
 763         if (!retval) {
 764                 ret = -EINVAL;
 765                 goto out;
 766         }
 767         ret = opt->set(bond, retval);
 768 out:
 769         if (ret)
 770                 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
 771
 772         return ret;
 773 }
 774 /**
 775  * __bond_opt_set_notify - set a bonding option
 776  * @bond: target bond device
 777  * @option: option to set
 778  * @val: value to set it to
 779  *
 780  * This function is used to change the bond's option value and trigger
 781  * a notification to user sapce. It can be used for both enabling/changing
 782  * an option and for disabling it. RTNL lock must be obtained before calling
 783  * this function.
 784  */
 785 int __bond_opt_set_notify(struct bonding *bond,
 786                           unsigned int option, struct bond_opt_value *val)
 787 {
 788         int ret;
 789
 790         ASSERT_RTNL();
 791
 792         ret = __bond_opt_set(bond, option, val, NULL, NULL);
 793
 794         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 795                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 796
 797         return ret;
 798 }
 799
 800 /**
 801  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 802  * @bond: target bond device
 803  * @option: option to set
 804  * @buf: value to set it to
 805  *
 806  * This function tries to acquire RTNL without blocking and if successful
 807  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 808  */
 809 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 810 {
 811         struct bond_opt_value optval;
 812         int ret;
 813
 814         if (!rtnl_trylock())
 815                 return restart_syscall();
 816         bond_opt_initstr(&optval, buf);
 817         ret = __bond_opt_set_notify(bond, option, &optval);
 818         rtnl_unlock();
 819
 820         return ret;
 821 }
 822
 823 /**
 824  * bond_opt_get - get a pointer to an option
 825  * @option: option for which to return a pointer
 826  *
 827  * This function checks if option is valid and if so returns a pointer
 828  * to its entry in the bond_opts[] option array.
 829  */
 830 const struct bond_option *bond_opt_get(unsigned int option)
 831 {
 832         if (!BOND_OPT_VALID(option))
 833                 return NULL;
 834
 835         return &bond_opts[option];
 836 }
 837
 838 static bool bond_set_xfrm_features(struct bonding *bond)
 839 {
 840         if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
 841                 return false;
 842
 843         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
 844                 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
 845         else
 846                 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
 847
 848         return true;
 849 }
 850
 851 static int bond_option_mode_set(struct bonding *bond,
 852                                 const struct bond_opt_value *newval)
 853 {
 854         if (!bond_mode_uses_arp(newval->value)) {
 855                 if (bond->params.arp_interval) {
 856                         netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 857                                    newval->string);
 858                         /* disable arp monitoring */
 859                         bond->params.arp_interval = 0;
 860                 }
 861
 862                 if (!bond->params.miimon) {
 863                         /* set miimon to default value */
 864                         bond->params.miimon = BOND_DEFAULT_MIIMON;
 865                         netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 866                                    bond->params.miimon);
 867                 }
 868         }
 869
 870         if (newval->value == BOND_MODE_ALB)
 871                 bond->params.tlb_dynamic_lb = 1;
 872
 873         /* don't cache arp_validate between modes */
 874         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 875         bond->params.mode = newval->value;
 876
 877         if (bond->dev->reg_state == NETREG_REGISTERED) {
 878                 bool update = false;
 879
 880                 update |= bond_set_xfrm_features(bond);
 881
 882                 if (update)
 883                         netdev_update_features(bond->dev);
 884         }
 885
 886         bond_xdp_set_features(bond->dev);
 887
 888         return 0;
 889 }
 890
 891 static int bond_option_active_slave_set(struct bonding *bond,
 892                                         const struct bond_opt_value *newval)
 893 {
 894         char ifname[IFNAMSIZ] = { 0, };
 895         struct net_device *slave_dev;
 896         int ret = 0;
 897
 898         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 899         if (!strlen(ifname) || newval->string[0] == '\n') {
 900                 slave_dev = NULL;
 901         } else {
 902                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 903                 if (!slave_dev)
 904                         return -ENODEV;
 905         }
 906
 907         if (slave_dev) {
 908                 if (!netif_is_bond_slave(slave_dev)) {
 909                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 910                         return -EINVAL;
 911                 }
 912
 913                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 914                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 915                         return -EINVAL;
 916                 }
 917         }
 918
 919         block_netpoll_tx();
 920         /* check to see if we are clearing active */
 921         if (!slave_dev) {
 922                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 923                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 924                 bond_select_active_slave(bond);
 925         } else {
 926                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 927                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 928
 929                 BUG_ON(!new_active);
 930
 931                 if (new_active == old_active) {
 932                         /* do nothing */
 933                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 934                 } else {
 935                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 936                             bond_slave_is_up(new_active)) {
 937                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 938                                 bond_change_active_slave(bond, new_active);
 939                         } else {
 940                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 941                                           new_active->dev->name);
 942                                 ret = -EINVAL;
 943                         }
 944                 }
 945         }
 946         unblock_netpoll_tx();
 947
 948         return ret;
 949 }
 950
 951 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 952  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 953  * start it.
 954  */
 955 static int bond_option_miimon_set(struct bonding *bond,
 956                                   const struct bond_opt_value *newval)
 957 {
 958         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 959                    newval->value);
 960         bond->params.miimon = newval->value;
 961         if (bond->params.updelay)
 962                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 963                            bond->params.updelay * bond->params.miimon);
 964         if (bond->params.downdelay)
 965                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 966                            bond->params.downdelay * bond->params.miimon);
 967         if (bond->params.peer_notif_delay)
 968                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 969                            bond->params.peer_notif_delay * bond->params.miimon);
 970         if (newval->value && bond->params.arp_interval) {
 971                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 972                 bond->params.arp_interval = 0;
 973                 if (bond->params.arp_validate)
 974                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 975         }
 976         if (bond->dev->flags & IFF_UP) {
 977                 /* If the interface is up, we may need to fire off
 978                  * the MII timer. If the interface is down, the
 979                  * timer will get fired off when the open function
 980                  * is called.
 981                  */
 982                 if (!newval->value) {
 983                         cancel_delayed_work_sync(&bond->mii_work);
 984                 } else {
 985                         cancel_delayed_work_sync(&bond->arp_work);
 986                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 987                 }
 988         }
 989
 990         return 0;
 991 }
 992
 993 /* Set up, down and peer notification delays. These must be multiples
 994  * of the MII monitoring value, and are stored internally as the
 995  * multiplier. Thus, we must translate to MS for the real world.
 996  */
 997 static int _bond_option_delay_set(struct bonding *bond,
 998                                   const struct bond_opt_value *newval,
 999                                   const char *name,
1000                                   int *target)
1001 {
1002         int value = newval->value;
1003
1004         if (!bond->params.miimon) {
1005                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1006                            name);
1007                 return -EPERM;
1008         }
1009         if ((value % bond->params.miimon) != 0) {
1010                 netdev_warn(bond->dev,
1011                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1012                             name,
1013                             value, bond->params.miimon,
1014                             (value / bond->params.miimon) *
1015                             bond->params.miimon);
1016         }
1017         *target = value / bond->params.miimon;
1018         netdev_dbg(bond->dev, "Setting %s to %d\n",
1019                    name,
1020                    *target * bond->params.miimon);
1021
1022         return 0;
1023 }
1024
1025 static int bond_option_updelay_set(struct bonding *bond,
1026                                    const struct bond_opt_value *newval)
1027 {
1028         return _bond_option_delay_set(bond, newval, "up delay",
1029                                       &bond->params.updelay);
1030 }
1031
1032 static int bond_option_downdelay_set(struct bonding *bond,
1033                                      const struct bond_opt_value *newval)
1034 {
1035         return _bond_option_delay_set(bond, newval, "down delay",
1036                                       &bond->params.downdelay);
1037 }
1038
1039 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1040                                             const struct bond_opt_value *newval)
1041 {
1042         int ret = _bond_option_delay_set(bond, newval,
1043                                          "peer notification delay",
1044                                          &bond->params.peer_notif_delay);
1045         return ret;
1046 }
1047
1048 static int bond_option_use_carrier_set(struct bonding *bond,
1049                                        const struct bond_opt_value *newval)
1050 {
1051         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1052                    newval->value);
1053         bond->params.use_carrier = newval->value;
1054
1055         return 0;
1056 }
1057
1058 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
1059  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
1060  * we must start it.
1061  */
1062 static int bond_option_arp_interval_set(struct bonding *bond,
1063                                         const struct bond_opt_value *newval)
1064 {
1065         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1066                    newval->value);
1067         bond->params.arp_interval = newval->value;
1068         if (newval->value) {
1069                 if (bond->params.miimon) {
1070                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1071                         bond->params.miimon = 0;
1072                 }
1073                 if (!bond->params.arp_targets[0])
1074                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1075         }
1076         if (bond->dev->flags & IFF_UP) {
1077                 /* If the interface is up, we may need to fire off
1078                  * the ARP timer.  If the interface is down, the
1079                  * timer will get fired off when the open function
1080                  * is called.
1081                  */
1082                 if (!newval->value) {
1083                         if (bond->params.arp_validate)
1084                                 bond->recv_probe = NULL;
1085                         cancel_delayed_work_sync(&bond->arp_work);
1086                 } else {
1087                         /* arp_validate can be set only in active-backup mode */
1088                         bond->recv_probe = bond_rcv_validate;
1089                         cancel_delayed_work_sync(&bond->mii_work);
1090                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
1091                 }
1092         }
1093
1094         return 0;
1095 }
1096
1097 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1098                                             __be32 target,
1099                                             unsigned long last_rx)
1100 {
1101         __be32 *targets = bond->params.arp_targets;
1102         struct list_head *iter;
1103         struct slave *slave;
1104
1105         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1106                 bond_for_each_slave(bond, slave, iter)
1107                         slave->target_last_arp_rx[slot] = last_rx;
1108                 targets[slot] = target;
1109         }
1110 }
1111
1112 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1113 {
1114         __be32 *targets = bond->params.arp_targets;
1115         int ind;
1116
1117         if (!bond_is_ip_target_ok(target)) {
1118                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1119                            &target);
1120                 return -EINVAL;
1121         }
1122
1123         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1124                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1125                            &target);
1126                 return -EINVAL;
1127         }
1128
1129         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1130         if (ind == -1) {
1131                 netdev_err(bond->dev, "ARP target table is full!\n");
1132                 return -EINVAL;
1133         }
1134
1135         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1136
1137         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1138
1139         return 0;
1140 }
1141
1142 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1143 {
1144         return _bond_option_arp_ip_target_add(bond, target);
1145 }
1146
1147 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1148 {
1149         __be32 *targets = bond->params.arp_targets;
1150         struct list_head *iter;
1151         struct slave *slave;
1152         unsigned long *targets_rx;
1153         int ind, i;
1154
1155         if (!bond_is_ip_target_ok(target)) {
1156                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1157                            &target);
1158                 return -EINVAL;
1159         }
1160
1161         ind = bond_get_targets_ip(targets, target);
1162         if (ind == -1) {
1163                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1164                            &target);
1165                 return -EINVAL;
1166         }
1167
1168         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1169                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1170
1171         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1172
1173         bond_for_each_slave(bond, slave, iter) {
1174                 targets_rx = slave->target_last_arp_rx;
1175                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1176                         targets_rx[i] = targets_rx[i+1];
1177                 targets_rx[i] = 0;
1178         }
1179         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1180                 targets[i] = targets[i+1];
1181         targets[i] = 0;
1182
1183         return 0;
1184 }
1185
1186 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1187 {
1188         int i;
1189
1190         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1191                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1192 }
1193
1194 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1195                                           const struct bond_opt_value *newval)
1196 {
1197         int ret = -EPERM;
1198         __be32 target;
1199
1200         if (newval->string) {
1201                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1202                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1203                                    &target);
1204                         return ret;
1205                 }
1206                 if (newval->string[0] == '+')
1207                         ret = bond_option_arp_ip_target_add(bond, target);
1208                 else if (newval->string[0] == '-')
1209                         ret = bond_option_arp_ip_target_rem(bond, target);
1210                 else
1211                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1212         } else {
1213                 target = newval->value;
1214                 ret = bond_option_arp_ip_target_add(bond, target);
1215         }
1216
1217         return ret;
1218 }
1219
1220 #if IS_ENABLED(CONFIG_IPV6)
1221 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1222                                             struct in6_addr *target,
1223                                             unsigned long last_rx)
1224 {
1225         struct in6_addr *targets = bond->params.ns_targets;
1226         struct list_head *iter;
1227         struct slave *slave;
1228
1229         if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1230                 bond_for_each_slave(bond, slave, iter)
1231                         slave->target_last_arp_rx[slot] = last_rx;
1232                 targets[slot] = *target;
1233         }
1234 }
1235
1236 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1237 {
1238         struct in6_addr addr_any = in6addr_any;
1239         int i;
1240
1241         for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1242                 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1243 }
1244
1245 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1246                                           const struct bond_opt_value *newval)
1247 {
1248         struct in6_addr *target = (struct in6_addr *)newval->extra;
1249         struct in6_addr *targets = bond->params.ns_targets;
1250         struct in6_addr addr_any = in6addr_any;
1251         int index;
1252
1253         if (!bond_is_ip6_target_ok(target)) {
1254                 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1255                            target);
1256                 return -EINVAL;
1257         }
1258
1259         if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1260                 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1261                            target);
1262                 return -EINVAL;
1263         }
1264
1265         index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1266         if (index == -1) {
1267                 netdev_err(bond->dev, "NS target table is full!\n");
1268                 return -EINVAL;
1269         }
1270
1271         netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1272
1273         _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1274
1275         return 0;
1276 }
1277 #else
1278 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1279                                           const struct bond_opt_value *newval)
1280 {
1281         return -EPERM;
1282 }
1283 #endif
1284
1285 static int bond_option_arp_validate_set(struct bonding *bond,
1286                                         const struct bond_opt_value *newval)
1287 {
1288         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1289                    newval->string, newval->value);
1290         bond->params.arp_validate = newval->value;
1291
1292         return 0;
1293 }
1294
1295 static int bond_option_arp_all_targets_set(struct bonding *bond,
1296                                            const struct bond_opt_value *newval)
1297 {
1298         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1299                    newval->string, newval->value);
1300         bond->params.arp_all_targets = newval->value;
1301
1302         return 0;
1303 }
1304
1305 static int bond_option_missed_max_set(struct bonding *bond,
1306                                       const struct bond_opt_value *newval)
1307 {
1308         netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1309                    newval->string, newval->value);
1310         bond->params.missed_max = newval->value;
1311
1312         return 0;
1313 }
1314
1315 static int bond_option_prio_set(struct bonding *bond,
1316                                 const struct bond_opt_value *newval)
1317 {
1318         struct slave *slave;
1319
1320         slave = bond_slave_get_rtnl(newval->slave_dev);
1321         if (!slave) {
1322                 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1323                 return -ENODEV;
1324         }
1325         slave->prio = newval->value;
1326
1327         if (rtnl_dereference(bond->primary_slave))
1328                 slave_warn(bond->dev, slave->dev,
1329                            "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1330         else
1331                 bond_select_active_slave(bond);
1332
1333         return 0;
1334 }
1335
1336 static int bond_option_primary_set(struct bonding *bond,
1337                                    const struct bond_opt_value *newval)
1338 {
1339         char *p, *primary = newval->string;
1340         struct list_head *iter;
1341         struct slave *slave;
1342
1343         block_netpoll_tx();
1344
1345         p = strchr(primary, '\n');
1346         if (p)
1347                 *p = '\0';
1348         /* check to see if we are clearing primary */
1349         if (!strlen(primary)) {
1350                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1351                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1352                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1353                 bond_select_active_slave(bond);
1354                 goto out;
1355         }
1356
1357         bond_for_each_slave(bond, slave, iter) {
1358                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1359                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1360                         rcu_assign_pointer(bond->primary_slave, slave);
1361                         strcpy(bond->params.primary, slave->dev->name);
1362                         bond->force_primary = true;
1363                         bond_select_active_slave(bond);
1364                         goto out;
1365                 }
1366         }
1367
1368         if (rtnl_dereference(bond->primary_slave)) {
1369                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1370                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1371                 bond_select_active_slave(bond);
1372         }
1373         strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1374
1375         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1376                    primary);
1377
1378 out:
1379         unblock_netpoll_tx();
1380
1381         return 0;
1382 }
1383
1384 static int bond_option_primary_reselect_set(struct bonding *bond,
1385                                             const struct bond_opt_value *newval)
1386 {
1387         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1388                    newval->string, newval->value);
1389         bond->params.primary_reselect = newval->value;
1390
1391         block_netpoll_tx();
1392         bond_select_active_slave(bond);
1393         unblock_netpoll_tx();
1394
1395         return 0;
1396 }
1397
1398 static int bond_option_fail_over_mac_set(struct bonding *bond,
1399                                          const struct bond_opt_value *newval)
1400 {
1401         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1402                    newval->string, newval->value);
1403         bond->params.fail_over_mac = newval->value;
1404
1405         return 0;
1406 }
1407
1408 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1409                                             const struct bond_opt_value *newval)
1410 {
1411         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1412                    newval->string, newval->value);
1413         bond->params.xmit_policy = newval->value;
1414
1415         return 0;
1416 }
1417
1418 static int bond_option_resend_igmp_set(struct bonding *bond,
1419                                        const struct bond_opt_value *newval)
1420 {
1421         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1422                    newval->value);
1423         bond->params.resend_igmp = newval->value;
1424
1425         return 0;
1426 }
1427
1428 static int bond_option_num_peer_notif_set(struct bonding *bond,
1429                                    const struct bond_opt_value *newval)
1430 {
1431         bond->params.num_peer_notif = newval->value;
1432
1433         return 0;
1434 }
1435
1436 static int bond_option_all_slaves_active_set(struct bonding *bond,
1437                                              const struct bond_opt_value *newval)
1438 {
1439         struct list_head *iter;
1440         struct slave *slave;
1441
1442         if (newval->value == bond->params.all_slaves_active)
1443                 return 0;
1444         bond->params.all_slaves_active = newval->value;
1445         bond_for_each_slave(bond, slave, iter) {
1446                 if (!bond_is_active_slave(slave)) {
1447                         if (newval->value)
1448                                 slave->inactive = 0;
1449                         else
1450                                 slave->inactive = 1;
1451                 }
1452         }
1453
1454         return 0;
1455 }
1456
1457 static int bond_option_min_links_set(struct bonding *bond,
1458                                      const struct bond_opt_value *newval)
1459 {
1460         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1461                    newval->value);
1462         bond->params.min_links = newval->value;
1463         bond_set_carrier(bond);
1464
1465         return 0;
1466 }
1467
1468 static int bond_option_lp_interval_set(struct bonding *bond,
1469                                        const struct bond_opt_value *newval)
1470 {
1471         bond->params.lp_interval = newval->value;
1472
1473         return 0;
1474 }
1475
1476 static int bond_option_pps_set(struct bonding *bond,
1477                                const struct bond_opt_value *newval)
1478 {
1479         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1480                    newval->value);
1481         bond->params.packets_per_slave = newval->value;
1482         if (newval->value > 0) {
1483                 bond->params.reciprocal_packets_per_slave =
1484                         reciprocal_value(newval->value);
1485         } else {
1486                 /* reciprocal_packets_per_slave is unused if
1487                  * packets_per_slave is 0 or 1, just initialize it
1488                  */
1489                 bond->params.reciprocal_packets_per_slave =
1490                         (struct reciprocal_value) { 0 };
1491         }
1492
1493         return 0;
1494 }
1495
1496 static int bond_option_lacp_active_set(struct bonding *bond,
1497                                        const struct bond_opt_value *newval)
1498 {
1499         netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1500                    newval->string, newval->value);
1501         bond->params.lacp_active = newval->value;
1502
1503         return 0;
1504 }
1505
1506 static int bond_option_lacp_rate_set(struct bonding *bond,
1507                                      const struct bond_opt_value *newval)
1508 {
1509         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1510                    newval->string, newval->value);
1511         bond->params.lacp_fast = newval->value;
1512         bond_3ad_update_lacp_rate(bond);
1513
1514         return 0;
1515 }
1516
1517 static int bond_option_ad_select_set(struct bonding *bond,
1518                                      const struct bond_opt_value *newval)
1519 {
1520         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1521                    newval->string, newval->value);
1522         bond->params.ad_select = newval->value;
1523
1524         return 0;
1525 }
1526
1527 static int bond_option_queue_id_set(struct bonding *bond,
1528                                     const struct bond_opt_value *newval)
1529 {
1530         struct slave *slave, *update_slave;
1531         struct net_device *sdev;
1532         struct list_head *iter;
1533         char *delim;
1534         int ret = 0;
1535         u16 qid;
1536
1537         /* delim will point to queue id if successful */
1538         delim = strchr(newval->string, ':');
1539         if (!delim)
1540                 goto err_no_cmd;
1541
1542         /* Terminate string that points to device name and bump it
1543          * up one, so we can read the queue id there.
1544          */
1545         *delim = '\0';
1546         if (sscanf(++delim, "%hd\n", &qid) != 1)
1547                 goto err_no_cmd;
1548
1549         /* Check buffer length, valid ifname and queue id */
1550         if (!dev_valid_name(newval->string) ||
1551             qid > bond->dev->real_num_tx_queues)
1552                 goto err_no_cmd;
1553
1554         /* Get the pointer to that interface if it exists */
1555         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1556         if (!sdev)
1557                 goto err_no_cmd;
1558
1559         /* Search for thes slave and check for duplicate qids */
1560         update_slave = NULL;
1561         bond_for_each_slave(bond, slave, iter) {
1562                 if (sdev == slave->dev)
1563                         /* We don't need to check the matching
1564                          * slave for dups, since we're overwriting it
1565                          */
1566                         update_slave = slave;
1567                 else if (qid && qid == slave->queue_id) {
1568                         goto err_no_cmd;
1569                 }
1570         }
1571
1572         if (!update_slave)
1573                 goto err_no_cmd;
1574
1575         /* Actually set the qids for the slave */
1576         update_slave->queue_id = qid;
1577
1578 out:
1579         return ret;
1580
1581 err_no_cmd:
1582         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1583         ret = -EPERM;
1584         goto out;
1585
1586 }
1587
1588 static int bond_option_slaves_set(struct bonding *bond,
1589                                   const struct bond_opt_value *newval)
1590 {
1591         char command[IFNAMSIZ + 1] = { 0, };
1592         struct net_device *dev;
1593         char *ifname;
1594         int ret;
1595
1596         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1597         ifname = command + 1;
1598         if ((strlen(command) <= 1) ||
1599             (command[0] != '+' && command[0] != '-') ||
1600             !dev_valid_name(ifname))
1601                 goto err_no_cmd;
1602
1603         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1604         if (!dev) {
1605                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1606                            ifname);
1607                 ret = -ENODEV;
1608                 goto out;
1609         }
1610
1611         switch (command[0]) {
1612         case '+':
1613                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1614                 ret = bond_enslave(bond->dev, dev, NULL);
1615                 break;
1616
1617         case '-':
1618                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1619                 ret = bond_release(bond->dev, dev);
1620                 break;
1621
1622         default:
1623                 /* should not run here. */
1624                 goto err_no_cmd;
1625         }
1626
1627 out:
1628         return ret;
1629
1630 err_no_cmd:
1631         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1632         ret = -EPERM;
1633         goto out;
1634 }
1635
1636 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1637                                           const struct bond_opt_value *newval)
1638 {
1639         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1640                    newval->string, newval->value);
1641         bond->params.tlb_dynamic_lb = newval->value;
1642
1643         return 0;
1644 }
1645
1646 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1647                                              const struct bond_opt_value *newval)
1648 {
1649         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1650                    newval->value);
1651
1652         bond->params.ad_actor_sys_prio = newval->value;
1653         bond_3ad_update_ad_actor_settings(bond);
1654
1655         return 0;
1656 }
1657
1658 static int bond_option_ad_actor_system_set(struct bonding *bond,
1659                                            const struct bond_opt_value *newval)
1660 {
1661         u8 macaddr[ETH_ALEN];
1662         u8 *mac;
1663
1664         if (newval->string) {
1665                 if (!mac_pton(newval->string, macaddr))
1666                         goto err;
1667                 mac = macaddr;
1668         } else {
1669                 mac = (u8 *)&newval->value;
1670         }
1671
1672         if (is_multicast_ether_addr(mac))
1673                 goto err;
1674
1675         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1676         ether_addr_copy(bond->params.ad_actor_system, mac);
1677         bond_3ad_update_ad_actor_settings(bond);
1678
1679         return 0;
1680
1681 err:
1682         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1683         return -EINVAL;
1684 }
1685
1686 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1687                                             const struct bond_opt_value *newval)
1688 {
1689         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1690                    newval->value);
1691
1692         bond->params.ad_user_port_key = newval->value;
1693         return 0;
1694 }