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 <[email protected]>
   5  * Copyright (c) 2013 Scott Feldman <[email protected]>
   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_arp_validate_set(struct bonding *bond,
  38                                         const struct bond_opt_value *newval);
  39 static int bond_option_arp_all_targets_set(struct bonding *bond,
  40                                            const struct bond_opt_value *newval);
  41 static int bond_option_primary_set(struct bonding *bond,
  42                                    const struct bond_opt_value *newval);
  43 static int bond_option_primary_reselect_set(struct bonding *bond,
  44                                             const struct bond_opt_value *newval);
  45 static int bond_option_fail_over_mac_set(struct bonding *bond,
  46                                          const struct bond_opt_value *newval);
  47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  48                                             const struct bond_opt_value *newval);
  49 static int bond_option_resend_igmp_set(struct bonding *bond,
  50                                        const struct bond_opt_value *newval);
  51 static int bond_option_num_peer_notif_set(struct bonding *bond,
  52                                           const struct bond_opt_value *newval);
  53 static int bond_option_all_slaves_active_set(struct bonding *bond,
  54                                              const struct bond_opt_value *newval);
  55 static int bond_option_min_links_set(struct bonding *bond,
  56                                      const struct bond_opt_value *newval);
  57 static int bond_option_lp_interval_set(struct bonding *bond,
  58                                        const struct bond_opt_value *newval);
  59 static int bond_option_pps_set(struct bonding *bond,
  60                                const struct bond_opt_value *newval);
  61 static int bond_option_lacp_active_set(struct bonding *bond,
  62                                        const struct bond_opt_value *newval);
  63 static int bond_option_lacp_rate_set(struct bonding *bond,
  64                                      const struct bond_opt_value *newval);
  65 static int bond_option_ad_select_set(struct bonding *bond,
  66                                      const struct bond_opt_value *newval);
  67 static int bond_option_queue_id_set(struct bonding *bond,
  68                                     const struct bond_opt_value *newval);
  69 static int bond_option_mode_set(struct bonding *bond,
  70                                 const struct bond_opt_value *newval);
  71 static int bond_option_slaves_set(struct bonding *bond,
  72                                   const struct bond_opt_value *newval);
  73 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
  74                                   const struct bond_opt_value *newval);
  75 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
  76                                              const struct bond_opt_value *newval);
  77 static int bond_option_ad_actor_system_set(struct bonding *bond,
  78                                            const struct bond_opt_value *newval);
  79 static int bond_option_ad_user_port_key_set(struct bonding *bond,
  80                                             const struct bond_opt_value *newval);
  81
  82
  83 static const struct bond_opt_value bond_mode_tbl[] = {
  84         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  85         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  86         { "balance-xor",   BOND_MODE_XOR,          0},
  87         { "broadcast",     BOND_MODE_BROADCAST,    0},
  88         { "802.3ad",       BOND_MODE_8023AD,       0},
  89         { "balance-tlb",   BOND_MODE_TLB,          0},
  90         { "balance-alb",   BOND_MODE_ALB,          0},
  91         { NULL,            -1,                     0},
  92 };
  93
  94 static const struct bond_opt_value bond_pps_tbl[] = {
  95         { "default", 1,         BOND_VALFLAG_DEFAULT},
  96         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  97         { NULL,      -1,        0},
  98 };
  99
 100 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
 101         { "layer2",      BOND_XMIT_POLICY_LAYER2,      BOND_VALFLAG_DEFAULT},
 102         { "layer3+4",    BOND_XMIT_POLICY_LAYER34,     0},
 103         { "layer2+3",    BOND_XMIT_POLICY_LAYER23,     0},
 104         { "encap2+3",    BOND_XMIT_POLICY_ENCAP23,     0},
 105         { "encap3+4",    BOND_XMIT_POLICY_ENCAP34,     0},
 106         { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
 107         { NULL,          -1,                           0},
 108 };
 109
 110 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 111         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 112         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 113         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 114         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 115         { "filter",             BOND_ARP_FILTER,                0},
 116         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 117         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 118         { NULL,                 -1,                             0},
 119 };
 120
 121 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 122         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 123         { "all", BOND_ARP_TARGETS_ALL, 0},
 124         { NULL,  -1,                   0},
 125 };
 126
 127 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 128         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 129         { "active", BOND_FOM_ACTIVE, 0},
 130         { "follow", BOND_FOM_FOLLOW, 0},
 131         { NULL,     -1,              0},
 132 };
 133
 134 static const struct bond_opt_value bond_intmax_tbl[] = {
 135         { "off",     0,       BOND_VALFLAG_DEFAULT},
 136         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 137         { NULL,      -1,      0}
 138 };
 139
 140 static const struct bond_opt_value bond_lacp_active[] = {
 141         { "off", 0,  0},
 142         { "on",  1,  BOND_VALFLAG_DEFAULT},
 143         { NULL,  -1, 0}
 144 };
 145
 146 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 147         { "slow", AD_LACP_SLOW, 0},
 148         { "fast", AD_LACP_FAST, 0},
 149         { NULL,   -1,           0},
 150 };
 151
 152 static const struct bond_opt_value bond_ad_select_tbl[] = {
 153         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 154         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 155         { "count",     BOND_AD_COUNT,     0},
 156         { NULL,        -1,                0},
 157 };
 158
 159 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 160         { "off",     0,   0},
 161         { "maxval",  255, BOND_VALFLAG_MAX},
 162         { "default", 1,   BOND_VALFLAG_DEFAULT},
 163         { NULL,      -1,  0}
 164 };
 165
 166 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 167         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 168         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 169         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 170         { NULL,      -1},
 171 };
 172
 173 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 174         { "off", 0,  0},
 175         { "on",  1,  BOND_VALFLAG_DEFAULT},
 176         { NULL,  -1, 0}
 177 };
 178
 179 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 180         { "off", 0,  BOND_VALFLAG_DEFAULT},
 181         { "on",  1,  0},
 182         { NULL,  -1, 0}
 183 };
 184
 185 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 186         { "off",     0,   0},
 187         { "maxval",  255, BOND_VALFLAG_MAX},
 188         { "default", 1,   BOND_VALFLAG_DEFAULT},
 189         { NULL,      -1,  0}
 190 };
 191
 192 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 193         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 194         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 195         { NULL,      -1,      0},
 196 };
 197
 198 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 199         { "off", 0,  0},
 200         { "on",  1,  BOND_VALFLAG_DEFAULT},
 201         { NULL,  -1, 0}
 202 };
 203
 204 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
 205         { "minval",  1,     BOND_VALFLAG_MIN},
 206         { "maxval",  65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
 207         { NULL,      -1,    0},
 208 };
 209
 210 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
 211         { "minval",  0,     BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 212         { "maxval",  1023,  BOND_VALFLAG_MAX},
 213         { NULL,      -1,    0},
 214 };
 215
 216 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
 217         [BOND_OPT_MODE] = {
 218                 .id = BOND_OPT_MODE,
 219                 .name = "mode",
 220                 .desc = "bond device mode",
 221                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 222                 .values = bond_mode_tbl,
 223                 .set = bond_option_mode_set
 224         },
 225         [BOND_OPT_PACKETS_PER_SLAVE] = {
 226                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 227                 .name = "packets_per_slave",
 228                 .desc = "Packets to send per slave in RR mode",
 229                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 230                 .values = bond_pps_tbl,
 231                 .set = bond_option_pps_set
 232         },
 233         [BOND_OPT_XMIT_HASH] = {
 234                 .id = BOND_OPT_XMIT_HASH,
 235                 .name = "xmit_hash_policy",
 236                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 237                 .values = bond_xmit_hashtype_tbl,
 238                 .set = bond_option_xmit_hash_policy_set
 239         },
 240         [BOND_OPT_ARP_VALIDATE] = {
 241                 .id = BOND_OPT_ARP_VALIDATE,
 242                 .name = "arp_validate",
 243                 .desc = "validate src/dst of ARP probes",
 244                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 245                                BIT(BOND_MODE_ALB),
 246                 .values = bond_arp_validate_tbl,
 247                 .set = bond_option_arp_validate_set
 248         },
 249         [BOND_OPT_ARP_ALL_TARGETS] = {
 250                 .id = BOND_OPT_ARP_ALL_TARGETS,
 251                 .name = "arp_all_targets",
 252                 .desc = "fail on any/all arp targets timeout",
 253                 .values = bond_arp_all_targets_tbl,
 254                 .set = bond_option_arp_all_targets_set
 255         },
 256         [BOND_OPT_FAIL_OVER_MAC] = {
 257                 .id = BOND_OPT_FAIL_OVER_MAC,
 258                 .name = "fail_over_mac",
 259                 .desc = "For active-backup, do not set all slaves to the same MAC",
 260                 .flags = BOND_OPTFLAG_NOSLAVES,
 261                 .values = bond_fail_over_mac_tbl,
 262                 .set = bond_option_fail_over_mac_set
 263         },
 264         [BOND_OPT_ARP_INTERVAL] = {
 265                 .id = BOND_OPT_ARP_INTERVAL,
 266                 .name = "arp_interval",
 267                 .desc = "arp interval in milliseconds",
 268                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 269                                BIT(BOND_MODE_ALB),
 270                 .values = bond_intmax_tbl,
 271                 .set = bond_option_arp_interval_set
 272         },
 273         [BOND_OPT_ARP_TARGETS] = {
 274                 .id = BOND_OPT_ARP_TARGETS,
 275                 .name = "arp_ip_target",
 276                 .desc = "arp targets in n.n.n.n form",
 277                 .flags = BOND_OPTFLAG_RAWVAL,
 278                 .set = bond_option_arp_ip_targets_set
 279         },
 280         [BOND_OPT_DOWNDELAY] = {
 281                 .id = BOND_OPT_DOWNDELAY,
 282                 .name = "downdelay",
 283                 .desc = "Delay before considering link down, in milliseconds",
 284                 .values = bond_intmax_tbl,
 285                 .set = bond_option_downdelay_set
 286         },
 287         [BOND_OPT_UPDELAY] = {
 288                 .id = BOND_OPT_UPDELAY,
 289                 .name = "updelay",
 290                 .desc = "Delay before considering link up, in milliseconds",
 291                 .values = bond_intmax_tbl,
 292                 .set = bond_option_updelay_set
 293         },
 294         [BOND_OPT_LACP_ACTIVE] = {
 295                 .id = BOND_OPT_LACP_ACTIVE,
 296                 .name = "lacp_active",
 297                 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
 298                 .flags = BOND_OPTFLAG_IFDOWN,
 299                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 300                 .values = bond_lacp_active,
 301                 .set = bond_option_lacp_active_set
 302         },
 303         [BOND_OPT_LACP_RATE] = {
 304                 .id = BOND_OPT_LACP_RATE,
 305                 .name = "lacp_rate",
 306                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 307                 .flags = BOND_OPTFLAG_IFDOWN,
 308                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 309                 .values = bond_lacp_rate_tbl,
 310                 .set = bond_option_lacp_rate_set
 311         },
 312         [BOND_OPT_MINLINKS] = {
 313                 .id = BOND_OPT_MINLINKS,
 314                 .name = "min_links",
 315                 .desc = "Minimum number of available links before turning on carrier",
 316                 .values = bond_intmax_tbl,
 317                 .set = bond_option_min_links_set
 318         },
 319         [BOND_OPT_AD_SELECT] = {
 320                 .id = BOND_OPT_AD_SELECT,
 321                 .name = "ad_select",
 322                 .desc = "803.ad aggregation selection logic",
 323                 .flags = BOND_OPTFLAG_IFDOWN,
 324                 .values = bond_ad_select_tbl,
 325                 .set = bond_option_ad_select_set
 326         },
 327         [BOND_OPT_NUM_PEER_NOTIF] = {
 328                 .id = BOND_OPT_NUM_PEER_NOTIF,
 329                 .name = "num_unsol_na",
 330                 .desc = "Number of peer notifications to send on failover event",
 331                 .values = bond_num_peer_notif_tbl,
 332                 .set = bond_option_num_peer_notif_set
 333         },
 334         [BOND_OPT_MIIMON] = {
 335                 .id = BOND_OPT_MIIMON,
 336                 .name = "miimon",
 337                 .desc = "Link check interval in milliseconds",
 338                 .values = bond_intmax_tbl,
 339                 .set = bond_option_miimon_set
 340         },
 341         [BOND_OPT_PRIMARY] = {
 342                 .id = BOND_OPT_PRIMARY,
 343                 .name = "primary",
 344                 .desc = "Primary network device to use",
 345                 .flags = BOND_OPTFLAG_RAWVAL,
 346                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 347                                                 BIT(BOND_MODE_TLB) |
 348                                                 BIT(BOND_MODE_ALB)),
 349                 .set = bond_option_primary_set
 350         },
 351         [BOND_OPT_PRIMARY_RESELECT] = {
 352                 .id = BOND_OPT_PRIMARY_RESELECT,
 353                 .name = "primary_reselect",
 354                 .desc = "Reselect primary slave once it comes up",
 355                 .values = bond_primary_reselect_tbl,
 356                 .set = bond_option_primary_reselect_set
 357         },
 358         [BOND_OPT_USE_CARRIER] = {
 359                 .id = BOND_OPT_USE_CARRIER,
 360                 .name = "use_carrier",
 361                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 362                 .values = bond_use_carrier_tbl,
 363                 .set = bond_option_use_carrier_set
 364         },
 365         [BOND_OPT_ACTIVE_SLAVE] = {
 366                 .id = BOND_OPT_ACTIVE_SLAVE,
 367                 .name = "active_slave",
 368                 .desc = "Currently active slave",
 369                 .flags = BOND_OPTFLAG_RAWVAL,
 370                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 371                                                 BIT(BOND_MODE_TLB) |
 372                                                 BIT(BOND_MODE_ALB)),
 373                 .set = bond_option_active_slave_set
 374         },
 375         [BOND_OPT_QUEUE_ID] = {
 376                 .id = BOND_OPT_QUEUE_ID,
 377                 .name = "queue_id",
 378                 .desc = "Set queue id of a slave",
 379                 .flags = BOND_OPTFLAG_RAWVAL,
 380                 .set = bond_option_queue_id_set
 381         },
 382         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 383                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 384                 .name = "all_slaves_active",
 385                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 386                 .values = bond_all_slaves_active_tbl,
 387                 .set = bond_option_all_slaves_active_set
 388         },
 389         [BOND_OPT_RESEND_IGMP] = {
 390                 .id = BOND_OPT_RESEND_IGMP,
 391                 .name = "resend_igmp",
 392                 .desc = "Number of IGMP membership reports to send on link failure",
 393                 .values = bond_resend_igmp_tbl,
 394                 .set = bond_option_resend_igmp_set
 395         },
 396         [BOND_OPT_LP_INTERVAL] = {
 397                 .id = BOND_OPT_LP_INTERVAL,
 398                 .name = "lp_interval",
 399                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 400                 .values = bond_lp_interval_tbl,
 401                 .set = bond_option_lp_interval_set
 402         },
 403         [BOND_OPT_SLAVES] = {
 404                 .id = BOND_OPT_SLAVES,
 405                 .name = "slaves",
 406                 .desc = "Slave membership management",
 407                 .flags = BOND_OPTFLAG_RAWVAL,
 408                 .set = bond_option_slaves_set
 409         },
 410         [BOND_OPT_TLB_DYNAMIC_LB] = {
 411                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 412                 .name = "tlb_dynamic_lb",
 413                 .desc = "Enable dynamic flow shuffling",
 414                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
 415                 .values = bond_tlb_dynamic_lb_tbl,
 416                 .flags = BOND_OPTFLAG_IFDOWN,
 417                 .set = bond_option_tlb_dynamic_lb_set,
 418         },
 419         [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
 420                 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
 421                 .name = "ad_actor_sys_prio",
 422                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 423                 .values = bond_ad_actor_sys_prio_tbl,
 424                 .set = bond_option_ad_actor_sys_prio_set,
 425         },
 426         [BOND_OPT_AD_ACTOR_SYSTEM] = {
 427                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
 428                 .name = "ad_actor_system",
 429                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 430                 .flags = BOND_OPTFLAG_RAWVAL,
 431                 .set = bond_option_ad_actor_system_set,
 432         },
 433         [BOND_OPT_AD_USER_PORT_KEY] = {
 434                 .id = BOND_OPT_AD_USER_PORT_KEY,
 435                 .name = "ad_user_port_key",
 436                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 437                 .flags = BOND_OPTFLAG_IFDOWN,
 438                 .values = bond_ad_user_port_key_tbl,
 439                 .set = bond_option_ad_user_port_key_set,
 440         },
 441         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
 442                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
 443                 .name = "num_grat_arp",
 444                 .desc = "Number of peer notifications to send on failover event",
 445                 .values = bond_num_peer_notif_tbl,
 446                 .set = bond_option_num_peer_notif_set
 447         },
 448         [BOND_OPT_PEER_NOTIF_DELAY] = {
 449                 .id = BOND_OPT_PEER_NOTIF_DELAY,
 450                 .name = "peer_notif_delay",
 451                 .desc = "Delay between each peer notification on failover event, in milliseconds",
 452                 .values = bond_intmax_tbl,
 453                 .set = bond_option_peer_notif_delay_set
 454         }
 455 };
 456
 457 /* Searches for an option by name */
 458 const struct bond_option *bond_opt_get_by_name(const char *name)
 459 {
 460         const struct bond_option *opt;
 461         int option;
 462
 463         for (option = 0; option < BOND_OPT_LAST; option++) {
 464                 opt = bond_opt_get(option);
 465                 if (opt && !strcmp(opt->name, name))
 466                         return opt;
 467         }
 468
 469         return NULL;
 470 }
 471
 472 /* Searches for a value in opt's values[] table */
 473 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 474 {
 475         const struct bond_option *opt;
 476         int i;
 477
 478         opt = bond_opt_get(option);
 479         if (WARN_ON(!opt))
 480                 return NULL;
 481         for (i = 0; opt->values && opt->values[i].string; i++)
 482                 if (opt->values[i].value == val)
 483                         return &opt->values[i];
 484
 485         return NULL;
 486 }
 487
 488 /* Searches for a value in opt's values[] table which matches the flagmask */
 489 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 490                                                        u32 flagmask)
 491 {
 492         int i;
 493
 494         for (i = 0; opt->values && opt->values[i].string; i++)
 495                 if (opt->values[i].flags & flagmask)
 496                         return &opt->values[i];
 497
 498         return NULL;
 499 }
 500
 501 /* If maxval is missing then there's no range to check. In case minval is
 502  * missing then it's considered to be 0.
 503  */
 504 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 505 {
 506         const struct bond_opt_value *minval, *maxval;
 507
 508         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 509         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 510         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 511                 return false;
 512
 513         return true;
 514 }
 515
 516 /**
 517  * bond_opt_parse - parse option value
 518  * @opt: the option to parse against
 519  * @val: value to parse
 520  *
 521  * This function tries to extract the value from @val and check if it's
 522  * a possible match for the option and returns NULL if a match isn't found,
 523  * or the struct_opt_value that matched. It also strips the new line from
 524  * @val->string if it's present.
 525  */
 526 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 527                                             struct bond_opt_value *val)
 528 {
 529         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 530         const struct bond_opt_value *tbl;
 531         const struct bond_opt_value *ret = NULL;
 532         bool checkval;
 533         int i, rv;
 534
 535         /* No parsing if the option wants a raw val */
 536         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 537                 return val;
 538
 539         tbl = opt->values;
 540         if (!tbl)
 541                 goto out;
 542
 543         /* ULLONG_MAX is used to bypass string processing */
 544         checkval = val->value != ULLONG_MAX;
 545         if (!checkval) {
 546                 if (!val->string)
 547                         goto out;
 548                 p = strchr(val->string, '\n');
 549                 if (p)
 550                         *p = '\0';
 551                 for (p = val->string; *p; p++)
 552                         if (!(isdigit(*p) || isspace(*p)))
 553                                 break;
 554                 /* The following code extracts the string to match or the value
 555                  * and sets checkval appropriately
 556                  */
 557                 if (*p) {
 558                         rv = sscanf(val->string, "%32s", valstr);
 559                 } else {
 560                         rv = sscanf(val->string, "%llu", &val->value);
 561                         checkval = true;
 562                 }
 563                 if (!rv)
 564                         goto out;
 565         }
 566
 567         for (i = 0; tbl[i].string; i++) {
 568                 /* Check for exact match */
 569                 if (checkval) {
 570                         if (val->value == tbl[i].value)
 571                                 ret = &tbl[i];
 572                 } else {
 573                         if (!strcmp(valstr, "default") &&
 574                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 575                                 ret = &tbl[i];
 576
 577                         if (!strcmp(valstr, tbl[i].string))
 578                                 ret = &tbl[i];
 579                 }
 580                 /* Found an exact match */
 581                 if (ret)
 582                         goto out;
 583         }
 584         /* Possible range match */
 585         if (checkval && bond_opt_check_range(opt, val->value))
 586                 ret = val;
 587 out:
 588         return ret;
 589 }
 590
 591 /* Check opt's dependencies against bond mode and currently set options */
 592 static int bond_opt_check_deps(struct bonding *bond,
 593                                const struct bond_option *opt)
 594 {
 595         struct bond_params *params = &bond->params;
 596
 597         if (test_bit(params->mode, &opt->unsuppmodes))
 598                 return -EACCES;
 599         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 600                 return -ENOTEMPTY;
 601         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 602                 return -EBUSY;
 603
 604         return 0;
 605 }
 606
 607 static void bond_opt_dep_print(struct bonding *bond,
 608                                const struct bond_option *opt)
 609 {
 610         const struct bond_opt_value *modeval;
 611         struct bond_params *params;
 612
 613         params = &bond->params;
 614         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 615         if (test_bit(params->mode, &opt->unsuppmodes))
 616                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 617                            opt->name, modeval->string, modeval->value);
 618 }
 619
 620 static void bond_opt_error_interpret(struct bonding *bond,
 621                                      const struct bond_option *opt,
 622                                      int error, const struct bond_opt_value *val)
 623 {
 624         const struct bond_opt_value *minval, *maxval;
 625         char *p;
 626
 627         switch (error) {
 628         case -EINVAL:
 629                 if (val) {
 630                         if (val->string) {
 631                                 /* sometimes RAWVAL opts may have new lines */
 632                                 p = strchr(val->string, '\n');
 633                                 if (p)
 634                                         *p = '\0';
 635                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
 636                                            opt->name, val->string);
 637                         } else {
 638                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
 639                                            opt->name, val->value);
 640                         }
 641                 }
 642                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 643                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 644                 if (!maxval)
 645                         break;
 646                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
 647                            opt->name, minval ? minval->value : 0, maxval->value);
 648                 break;
 649         case -EACCES:
 650                 bond_opt_dep_print(bond, opt);
 651                 break;
 652         case -ENOTEMPTY:
 653                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
 654                            opt->name);
 655                 break;
 656         case -EBUSY:
 657                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 658                            opt->name);
 659                 break;
 660         case -ENODEV:
 661                 if (val && val->string) {
 662                         p = strchr(val->string, '\n');
 663                         if (p)
 664                                 *p = '\0';
 665                         netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
 666                                    opt->name, val->string);
 667                 }
 668                 break;
 669         default:
 670                 break;
 671         }
 672 }
 673
 674 /**
 675  * __bond_opt_set - set a bonding option
 676  * @bond: target bond device
 677  * @option: option to set
 678  * @val: value to set it to
 679  *
 680  * This function is used to change the bond's option value, it can be
 681  * used for both enabling/changing an option and for disabling it. RTNL lock
 682  * must be obtained before calling this function.
 683  */
 684 int __bond_opt_set(struct bonding *bond,
 685                    unsigned int option, struct bond_opt_value *val)
 686 {
 687         const struct bond_opt_value *retval = NULL;
 688         const struct bond_option *opt;
 689         int ret = -ENOENT;
 690
 691         ASSERT_RTNL();
 692
 693         opt = bond_opt_get(option);
 694         if (WARN_ON(!val) || WARN_ON(!opt))
 695                 goto out;
 696         ret = bond_opt_check_deps(bond, opt);
 697         if (ret)
 698                 goto out;
 699         retval = bond_opt_parse(opt, val);
 700         if (!retval) {
 701                 ret = -EINVAL;
 702                 goto out;
 703         }
 704         ret = opt->set(bond, retval);
 705 out:
 706         if (ret)
 707                 bond_opt_error_interpret(bond, opt, ret, val);
 708
 709         return ret;
 710 }
 711 /**
 712  * __bond_opt_set_notify - set a bonding option
 713  * @bond: target bond device
 714  * @option: option to set
 715  * @val: value to set it to
 716  *
 717  * This function is used to change the bond's option value and trigger
 718  * a notification to user sapce. It can be used for both enabling/changing
 719  * an option and for disabling it. RTNL lock must be obtained before calling
 720  * this function.
 721  */
 722 int __bond_opt_set_notify(struct bonding *bond,
 723                           unsigned int option, struct bond_opt_value *val)
 724 {
 725         int ret;
 726
 727         ASSERT_RTNL();
 728
 729         ret = __bond_opt_set(bond, option, val);
 730
 731         if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
 732                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
 733
 734         return ret;
 735 }
 736
 737 /**
 738  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 739  * @bond: target bond device
 740  * @option: option to set
 741  * @buf: value to set it to
 742  *
 743  * This function tries to acquire RTNL without blocking and if successful
 744  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 745  */
 746 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 747 {
 748         struct bond_opt_value optval;
 749         int ret;
 750
 751         if (!rtnl_trylock())
 752                 return restart_syscall();
 753         bond_opt_initstr(&optval, buf);
 754         ret = __bond_opt_set_notify(bond, option, &optval);
 755         rtnl_unlock();
 756
 757         return ret;
 758 }
 759
 760 /**
 761  * bond_opt_get - get a pointer to an option
 762  * @option: option for which to return a pointer
 763  *
 764  * This function checks if option is valid and if so returns a pointer
 765  * to its entry in the bond_opts[] option array.
 766  */
 767 const struct bond_option *bond_opt_get(unsigned int option)
 768 {
 769         if (!BOND_OPT_VALID(option))
 770                 return NULL;
 771
 772         return &bond_opts[option];
 773 }
 774
 775 static bool bond_set_xfrm_features(struct bonding *bond)
 776 {
 777         if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
 778                 return false;
 779
 780         if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
 781                 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
 782         else
 783                 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
 784
 785         return true;
 786 }
 787
 788 static bool bond_set_tls_features(struct bonding *bond)
 789 {
 790         if (!IS_ENABLED(CONFIG_TLS_DEVICE))
 791                 return false;
 792
 793         if (bond_sk_check(bond))
 794                 bond->dev->wanted_features |= BOND_TLS_FEATURES;
 795         else
 796                 bond->dev->wanted_features &= ~BOND_TLS_FEATURES;
 797
 798         return true;
 799 }
 800
 801 static int bond_option_mode_set(struct bonding *bond,
 802                                 const struct bond_opt_value *newval)
 803 {
 804         if (!bond_mode_uses_arp(newval->value)) {
 805                 if (bond->params.arp_interval) {
 806                         netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
 807                                    newval->string);
 808                         /* disable arp monitoring */
 809                         bond->params.arp_interval = 0;
 810                 }
 811
 812                 if (!bond->params.miimon) {
 813                         /* set miimon to default value */
 814                         bond->params.miimon = BOND_DEFAULT_MIIMON;
 815                         netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
 816                                    bond->params.miimon);
 817                 }
 818         }
 819
 820         if (newval->value == BOND_MODE_ALB)
 821                 bond->params.tlb_dynamic_lb = 1;
 822
 823         /* don't cache arp_validate between modes */
 824         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 825         bond->params.mode = newval->value;
 826
 827         if (bond->dev->reg_state == NETREG_REGISTERED) {
 828                 bool update = false;
 829
 830                 update |= bond_set_xfrm_features(bond);
 831                 update |= bond_set_tls_features(bond);
 832
 833                 if (update)
 834                         netdev_update_features(bond->dev);
 835         }
 836
 837         return 0;
 838 }
 839
 840 static int bond_option_active_slave_set(struct bonding *bond,
 841                                         const struct bond_opt_value *newval)
 842 {
 843         char ifname[IFNAMSIZ] = { 0, };
 844         struct net_device *slave_dev;
 845         int ret = 0;
 846
 847         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 848         if (!strlen(ifname) || newval->string[0] == '\n') {
 849                 slave_dev = NULL;
 850         } else {
 851                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 852                 if (!slave_dev)
 853                         return -ENODEV;
 854         }
 855
 856         if (slave_dev) {
 857                 if (!netif_is_bond_slave(slave_dev)) {
 858                         slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
 859                         return -EINVAL;
 860                 }
 861
 862                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 863                         slave_err(bond->dev, slave_dev, "Device is not our slave\n");
 864                         return -EINVAL;
 865                 }
 866         }
 867
 868         block_netpoll_tx();
 869         /* check to see if we are clearing active */
 870         if (!slave_dev) {
 871                 netdev_dbg(bond->dev, "Clearing current active slave\n");
 872                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 873                 bond_select_active_slave(bond);
 874         } else {
 875                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
 876                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 877
 878                 BUG_ON(!new_active);
 879
 880                 if (new_active == old_active) {
 881                         /* do nothing */
 882                         slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
 883                 } else {
 884                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 885                             bond_slave_is_up(new_active)) {
 886                                 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
 887                                 bond_change_active_slave(bond, new_active);
 888                         } else {
 889                                 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
 890                                           new_active->dev->name);
 891                                 ret = -EINVAL;
 892                         }
 893                 }
 894         }
 895         unblock_netpoll_tx();
 896
 897         return ret;
 898 }
 899
 900 /* There are two tricky bits here.  First, if MII monitoring is activated, then
 901  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
 902  * start it.
 903  */
 904 static int bond_option_miimon_set(struct bonding *bond,
 905                                   const struct bond_opt_value *newval)
 906 {
 907         netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
 908                    newval->value);
 909         bond->params.miimon = newval->value;
 910         if (bond->params.updelay)
 911                 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 912                            bond->params.updelay * bond->params.miimon);
 913         if (bond->params.downdelay)
 914                 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 915                            bond->params.downdelay * bond->params.miimon);
 916         if (bond->params.peer_notif_delay)
 917                 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
 918                            bond->params.peer_notif_delay * bond->params.miimon);
 919         if (newval->value && bond->params.arp_interval) {
 920                 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
 921                 bond->params.arp_interval = 0;
 922                 if (bond->params.arp_validate)
 923                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 924         }
 925         if (bond->dev->flags & IFF_UP) {
 926                 /* If the interface is up, we may need to fire off
 927                  * the MII timer. If the interface is down, the
 928                  * timer will get fired off when the open function
 929                  * is called.
 930                  */
 931                 if (!newval->value) {
 932                         cancel_delayed_work_sync(&bond->mii_work);
 933                 } else {
 934                         cancel_delayed_work_sync(&bond->arp_work);
 935                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 936                 }
 937         }
 938
 939         return 0;
 940 }
 941
 942 /* Set up, down and peer notification delays. These must be multiples
 943  * of the MII monitoring value, and are stored internally as the
 944  * multiplier. Thus, we must translate to MS for the real world.
 945  */
 946 static int _bond_option_delay_set(struct bonding *bond,
 947                                   const struct bond_opt_value *newval,
 948                                   const char *name,
 949                                   int *target)
 950 {
 951         int value = newval->value;
 952
 953         if (!bond->params.miimon) {
 954                 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
 955                            name);
 956                 return -EPERM;
 957         }
 958         if ((value % bond->params.miimon) != 0) {
 959                 netdev_warn(bond->dev,
 960                             "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
 961                             name,
 962                             value, bond->params.miimon,
 963                             (value / bond->params.miimon) *
 964                             bond->params.miimon);
 965         }
 966         *target = value / bond->params.miimon;
 967         netdev_dbg(bond->dev, "Setting %s to %d\n",
 968                    name,
 969                    *target * bond->params.miimon);
 970
 971         return 0;
 972 }
 973
 974 static int bond_option_updelay_set(struct bonding *bond,
 975                                    const struct bond_opt_value *newval)
 976 {
 977         return _bond_option_delay_set(bond, newval, "up delay",
 978                                       &bond->params.updelay);
 979 }
 980
 981 static int bond_option_downdelay_set(struct bonding *bond,
 982                                      const struct bond_opt_value *newval)
 983 {
 984         return _bond_option_delay_set(bond, newval, "down delay",
 985                                       &bond->params.downdelay);
 986 }
 987
 988 static int bond_option_peer_notif_delay_set(struct bonding *bond,
 989                                             const struct bond_opt_value *newval)
 990 {
 991         int ret = _bond_option_delay_set(bond, newval,
 992                                          "peer notification delay",
 993                                          &bond->params.peer_notif_delay);
 994         return ret;
 995 }
 996
 997 static int bond_option_use_carrier_set(struct bonding *bond,
 998                                        const struct bond_opt_value *newval)
 999 {
1000         netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1001                    newval->value);
1002         bond->params.use_carrier = newval->value;
1003
1004         return 0;
1005 }
1006
1007 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
1008  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
1009  * we must start it.
1010  */
1011 static int bond_option_arp_interval_set(struct bonding *bond,
1012                                         const struct bond_opt_value *newval)
1013 {
1014         netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1015                    newval->value);
1016         bond->params.arp_interval = newval->value;
1017         if (newval->value) {
1018                 if (bond->params.miimon) {
1019                         netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1020                         bond->params.miimon = 0;
1021                 }
1022                 if (!bond->params.arp_targets[0])
1023                         netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1024         }
1025         if (bond->dev->flags & IFF_UP) {
1026                 /* If the interface is up, we may need to fire off
1027                  * the ARP timer.  If the interface is down, the
1028                  * timer will get fired off when the open function
1029                  * is called.
1030                  */
1031                 if (!newval->value) {
1032                         if (bond->params.arp_validate)
1033                                 bond->recv_probe = NULL;
1034                         cancel_delayed_work_sync(&bond->arp_work);
1035                 } else {
1036                         /* arp_validate can be set only in active-backup mode */
1037                         bond->recv_probe = bond_arp_rcv;
1038                         cancel_delayed_work_sync(&bond->mii_work);
1039                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
1040                 }
1041         }
1042
1043         return 0;
1044 }
1045
1046 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1047                                             __be32 target,
1048                                             unsigned long last_rx)
1049 {
1050         __be32 *targets = bond->params.arp_targets;
1051         struct list_head *iter;
1052         struct slave *slave;
1053
1054         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1055                 bond_for_each_slave(bond, slave, iter)
1056                         slave->target_last_arp_rx[slot] = last_rx;
1057                 targets[slot] = target;
1058         }
1059 }
1060
1061 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1062 {
1063         __be32 *targets = bond->params.arp_targets;
1064         int ind;
1065
1066         if (!bond_is_ip_target_ok(target)) {
1067                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1068                            &target);
1069                 return -EINVAL;
1070         }
1071
1072         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1073                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1074                            &target);
1075                 return -EINVAL;
1076         }
1077
1078         ind = bond_get_targets_ip(targets, 0); /* first free slot */
1079         if (ind == -1) {
1080                 netdev_err(bond->dev, "ARP target table is full!\n");
1081                 return -EINVAL;
1082         }
1083
1084         netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1085
1086         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1087
1088         return 0;
1089 }
1090
1091 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1092 {
1093         return _bond_option_arp_ip_target_add(bond, target);
1094 }
1095
1096 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1097 {
1098         __be32 *targets = bond->params.arp_targets;
1099         struct list_head *iter;
1100         struct slave *slave;
1101         unsigned long *targets_rx;
1102         int ind, i;
1103
1104         if (!bond_is_ip_target_ok(target)) {
1105                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1106                            &target);
1107                 return -EINVAL;
1108         }
1109
1110         ind = bond_get_targets_ip(targets, target);
1111         if (ind == -1) {
1112                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1113                            &target);
1114                 return -EINVAL;
1115         }
1116
1117         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1118                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1119
1120         netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1121
1122         bond_for_each_slave(bond, slave, iter) {
1123                 targets_rx = slave->target_last_arp_rx;
1124                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1125                         targets_rx[i] = targets_rx[i+1];
1126                 targets_rx[i] = 0;
1127         }
1128         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1129                 targets[i] = targets[i+1];
1130         targets[i] = 0;
1131
1132         return 0;
1133 }
1134
1135 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1136 {
1137         int i;
1138
1139         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1140                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1141 }
1142
1143 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1144                                           const struct bond_opt_value *newval)
1145 {
1146         int ret = -EPERM;
1147         __be32 target;
1148
1149         if (newval->string) {
1150                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1151                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1152                                    &target);
1153                         return ret;
1154                 }
1155                 if (newval->string[0] == '+')
1156                         ret = bond_option_arp_ip_target_add(bond, target);
1157                 else if (newval->string[0] == '-')
1158                         ret = bond_option_arp_ip_target_rem(bond, target);
1159                 else
1160                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1161         } else {
1162                 target = newval->value;
1163                 ret = bond_option_arp_ip_target_add(bond, target);
1164         }
1165
1166         return ret;
1167 }
1168
1169 static int bond_option_arp_validate_set(struct bonding *bond,
1170                                         const struct bond_opt_value *newval)
1171 {
1172         netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1173                    newval->string, newval->value);
1174         bond->params.arp_validate = newval->value;
1175
1176         return 0;
1177 }
1178
1179 static int bond_option_arp_all_targets_set(struct bonding *bond,
1180                                            const struct bond_opt_value *newval)
1181 {
1182         netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1183                    newval->string, newval->value);
1184         bond->params.arp_all_targets = newval->value;
1185
1186         return 0;
1187 }
1188
1189 static int bond_option_primary_set(struct bonding *bond,
1190                                    const struct bond_opt_value *newval)
1191 {
1192         char *p, *primary = newval->string;
1193         struct list_head *iter;
1194         struct slave *slave;
1195
1196         block_netpoll_tx();
1197
1198         p = strchr(primary, '\n');
1199         if (p)
1200                 *p = '\0';
1201         /* check to see if we are clearing primary */
1202         if (!strlen(primary)) {
1203                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1204                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1205                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1206                 bond_select_active_slave(bond);
1207                 goto out;
1208         }
1209
1210         bond_for_each_slave(bond, slave, iter) {
1211                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1212                         slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1213                         rcu_assign_pointer(bond->primary_slave, slave);
1214                         strcpy(bond->params.primary, slave->dev->name);
1215                         bond->force_primary = true;
1216                         bond_select_active_slave(bond);
1217                         goto out;
1218                 }
1219         }
1220
1221         if (rtnl_dereference(bond->primary_slave)) {
1222                 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1223                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1224                 bond_select_active_slave(bond);
1225         }
1226         strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1227
1228         netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1229                    primary);
1230
1231 out:
1232         unblock_netpoll_tx();
1233
1234         return 0;
1235 }
1236
1237 static int bond_option_primary_reselect_set(struct bonding *bond,
1238                                             const struct bond_opt_value *newval)
1239 {
1240         netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1241                    newval->string, newval->value);
1242         bond->params.primary_reselect = newval->value;
1243
1244         block_netpoll_tx();
1245         bond_select_active_slave(bond);
1246         unblock_netpoll_tx();
1247
1248         return 0;
1249 }
1250
1251 static int bond_option_fail_over_mac_set(struct bonding *bond,
1252                                          const struct bond_opt_value *newval)
1253 {
1254         netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1255                    newval->string, newval->value);
1256         bond->params.fail_over_mac = newval->value;
1257
1258         return 0;
1259 }
1260
1261 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1262                                             const struct bond_opt_value *newval)
1263 {
1264         netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1265                    newval->string, newval->value);
1266         bond->params.xmit_policy = newval->value;
1267
1268         if (bond->dev->reg_state == NETREG_REGISTERED)
1269                 if (bond_set_tls_features(bond))
1270                         netdev_update_features(bond->dev);
1271
1272         return 0;
1273 }
1274
1275 static int bond_option_resend_igmp_set(struct bonding *bond,
1276                                        const struct bond_opt_value *newval)
1277 {
1278         netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1279                    newval->value);
1280         bond->params.resend_igmp = newval->value;
1281
1282         return 0;
1283 }
1284
1285 static int bond_option_num_peer_notif_set(struct bonding *bond,
1286                                    const struct bond_opt_value *newval)
1287 {
1288         bond->params.num_peer_notif = newval->value;
1289
1290         return 0;
1291 }
1292
1293 static int bond_option_all_slaves_active_set(struct bonding *bond,
1294                                              const struct bond_opt_value *newval)
1295 {
1296         struct list_head *iter;
1297         struct slave *slave;
1298
1299         if (newval->value == bond->params.all_slaves_active)
1300                 return 0;
1301         bond->params.all_slaves_active = newval->value;
1302         bond_for_each_slave(bond, slave, iter) {
1303                 if (!bond_is_active_slave(slave)) {
1304                         if (newval->value)
1305                                 slave->inactive = 0;
1306                         else
1307                                 slave->inactive = 1;
1308                 }
1309         }
1310
1311         return 0;
1312 }
1313
1314 static int bond_option_min_links_set(struct bonding *bond,
1315                                      const struct bond_opt_value *newval)
1316 {
1317         netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1318                    newval->value);
1319         bond->params.min_links = newval->value;
1320         bond_set_carrier(bond);
1321
1322         return 0;
1323 }
1324
1325 static int bond_option_lp_interval_set(struct bonding *bond,
1326                                        const struct bond_opt_value *newval)
1327 {
1328         bond->params.lp_interval = newval->value;
1329
1330         return 0;
1331 }
1332
1333 static int bond_option_pps_set(struct bonding *bond,
1334                                const struct bond_opt_value *newval)
1335 {
1336         netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1337                    newval->value);
1338         bond->params.packets_per_slave = newval->value;
1339         if (newval->value > 0) {
1340                 bond->params.reciprocal_packets_per_slave =
1341                         reciprocal_value(newval->value);
1342         } else {
1343                 /* reciprocal_packets_per_slave is unused if
1344                  * packets_per_slave is 0 or 1, just initialize it
1345                  */
1346                 bond->params.reciprocal_packets_per_slave =
1347                         (struct reciprocal_value) { 0 };
1348         }
1349
1350         return 0;
1351 }
1352
1353 static int bond_option_lacp_active_set(struct bonding *bond,
1354                                        const struct bond_opt_value *newval)
1355 {
1356         netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1357                    newval->string, newval->value);
1358         bond->params.lacp_active = newval->value;
1359
1360         return 0;
1361 }
1362
1363 static int bond_option_lacp_rate_set(struct bonding *bond,
1364                                      const struct bond_opt_value *newval)
1365 {
1366         netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1367                    newval->string, newval->value);
1368         bond->params.lacp_fast = newval->value;
1369         bond_3ad_update_lacp_rate(bond);
1370
1371         return 0;
1372 }
1373
1374 static int bond_option_ad_select_set(struct bonding *bond,
1375                                      const struct bond_opt_value *newval)
1376 {
1377         netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1378                    newval->string, newval->value);
1379         bond->params.ad_select = newval->value;
1380
1381         return 0;
1382 }
1383
1384 static int bond_option_queue_id_set(struct bonding *bond,
1385                                     const struct bond_opt_value *newval)
1386 {
1387         struct slave *slave, *update_slave;
1388         struct net_device *sdev;
1389         struct list_head *iter;
1390         char *delim;
1391         int ret = 0;
1392         u16 qid;
1393
1394         /* delim will point to queue id if successful */
1395         delim = strchr(newval->string, ':');
1396         if (!delim)
1397                 goto err_no_cmd;
1398
1399         /* Terminate string that points to device name and bump it
1400          * up one, so we can read the queue id there.
1401          */
1402         *delim = '\0';
1403         if (sscanf(++delim, "%hd\n", &qid) != 1)
1404                 goto err_no_cmd;
1405
1406         /* Check buffer length, valid ifname and queue id */
1407         if (!dev_valid_name(newval->string) ||
1408             qid > bond->dev->real_num_tx_queues)
1409                 goto err_no_cmd;
1410
1411         /* Get the pointer to that interface if it exists */
1412         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1413         if (!sdev)
1414                 goto err_no_cmd;
1415
1416         /* Search for thes slave and check for duplicate qids */
1417         update_slave = NULL;
1418         bond_for_each_slave(bond, slave, iter) {
1419                 if (sdev == slave->dev)
1420                         /* We don't need to check the matching
1421                          * slave for dups, since we're overwriting it
1422                          */
1423                         update_slave = slave;
1424                 else if (qid && qid == slave->queue_id) {
1425                         goto err_no_cmd;
1426                 }
1427         }
1428
1429         if (!update_slave)
1430                 goto err_no_cmd;
1431
1432         /* Actually set the qids for the slave */
1433         update_slave->queue_id = qid;
1434
1435 out:
1436         return ret;
1437
1438 err_no_cmd:
1439         netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1440         ret = -EPERM;
1441         goto out;
1442
1443 }
1444
1445 static int bond_option_slaves_set(struct bonding *bond,
1446                                   const struct bond_opt_value *newval)
1447 {
1448         char command[IFNAMSIZ + 1] = { 0, };
1449         struct net_device *dev;
1450         char *ifname;
1451         int ret;
1452
1453         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1454         ifname = command + 1;
1455         if ((strlen(command) <= 1) ||
1456             (command[0] != '+' && command[0] != '-') ||
1457             !dev_valid_name(ifname))
1458                 goto err_no_cmd;
1459
1460         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1461         if (!dev) {
1462                 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1463                            ifname);
1464                 ret = -ENODEV;
1465                 goto out;
1466         }
1467
1468         switch (command[0]) {
1469         case '+':
1470                 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1471                 ret = bond_enslave(bond->dev, dev, NULL);
1472                 break;
1473
1474         case '-':
1475                 slave_dbg(bond->dev, dev, "Releasing interface\n");
1476                 ret = bond_release(bond->dev, dev);
1477                 break;
1478
1479         default:
1480                 /* should not run here. */
1481                 goto err_no_cmd;
1482         }
1483
1484 out:
1485         return ret;
1486
1487 err_no_cmd:
1488         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1489         ret = -EPERM;
1490         goto out;
1491 }
1492
1493 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1494                                           const struct bond_opt_value *newval)
1495 {
1496         netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1497                    newval->string, newval->value);
1498         bond->params.tlb_dynamic_lb = newval->value;
1499
1500         return 0;
1501 }
1502
1503 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1504                                              const struct bond_opt_value *newval)
1505 {
1506         netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1507                    newval->value);
1508
1509         bond->params.ad_actor_sys_prio = newval->value;
1510         bond_3ad_update_ad_actor_settings(bond);
1511
1512         return 0;
1513 }
1514
1515 static int bond_option_ad_actor_system_set(struct bonding *bond,
1516                                            const struct bond_opt_value *newval)
1517 {
1518         u8 macaddr[ETH_ALEN];
1519         u8 *mac;
1520
1521         if (newval->string) {
1522                 if (!mac_pton(newval->string, macaddr))
1523                         goto err;
1524                 mac = macaddr;
1525         } else {
1526                 mac = (u8 *)&newval->value;
1527         }
1528
1529         if (!is_valid_ether_addr(mac))
1530                 goto err;
1531
1532         netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1533         ether_addr_copy(bond->params.ad_actor_system, mac);
1534         bond_3ad_update_ad_actor_settings(bond);
1535
1536         return 0;
1537
1538 err:
1539         netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1540         return -EINVAL;
1541 }
1542
1543 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1544                                             const struct bond_opt_value *newval)
1545 {
1546         netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1547                    newval->value);
1548
1549         bond->params.ad_user_port_key = newval->value;
1550         return 0;
1551 }