drivers/net/bonding/bond_options.c

   1 /*
   2  * drivers/net/bond/bond_options.c - bonding options
   3  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   4  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/errno.h>
  15 #include <linux/if.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/rcupdate.h>
  19 #include <linux/ctype.h>
  20 #include <linux/inet.h>
  21 #include "bonding.h"
  22
  23 static int bond_option_active_slave_set(struct bonding *bond,
  24                                         const struct bond_opt_value *newval);
  25 static int bond_option_miimon_set(struct bonding *bond,
  26                                   const struct bond_opt_value *newval);
  27 static int bond_option_updelay_set(struct bonding *bond,
  28                                    const struct bond_opt_value *newval);
  29 static int bond_option_downdelay_set(struct bonding *bond,
  30                                      const struct bond_opt_value *newval);
  31 static int bond_option_use_carrier_set(struct bonding *bond,
  32                                        const struct bond_opt_value *newval);
  33 static int bond_option_arp_interval_set(struct bonding *bond,
  34                                         const struct bond_opt_value *newval);
  35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
  36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
  37 static int bond_option_arp_ip_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_primary_set(struct bonding *bond,
  44                                    const struct bond_opt_value *newval);
  45 static int bond_option_primary_reselect_set(struct bonding *bond,
  46                                             const struct bond_opt_value *newval);
  47 static int bond_option_fail_over_mac_set(struct bonding *bond,
  48                                          const struct bond_opt_value *newval);
  49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
  50                                             const struct bond_opt_value *newval);
  51 static int bond_option_resend_igmp_set(struct bonding *bond,
  52                                        const struct bond_opt_value *newval);
  53 static int bond_option_num_peer_notif_set(struct bonding *bond,
  54                                           const struct bond_opt_value *newval);
  55 static int bond_option_all_slaves_active_set(struct bonding *bond,
  56                                              const struct bond_opt_value *newval);
  57 static int bond_option_min_links_set(struct bonding *bond,
  58                                      const struct bond_opt_value *newval);
  59 static int bond_option_lp_interval_set(struct bonding *bond,
  60                                        const struct bond_opt_value *newval);
  61 static int bond_option_pps_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
  76
  77 static const struct bond_opt_value bond_mode_tbl[] = {
  78         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
  79         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
  80         { "balance-xor",   BOND_MODE_XOR,          0},
  81         { "broadcast",     BOND_MODE_BROADCAST,    0},
  82         { "802.3ad",       BOND_MODE_8023AD,       0},
  83         { "balance-tlb",   BOND_MODE_TLB,          0},
  84         { "balance-alb",   BOND_MODE_ALB,          0},
  85         { NULL,            -1,                     0},
  86 };
  87
  88 static const struct bond_opt_value bond_pps_tbl[] = {
  89         { "default", 1,         BOND_VALFLAG_DEFAULT},
  90         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
  91         { NULL,      -1,        0},
  92 };
  93
  94 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
  95         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
  96         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
  97         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
  98         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
  99         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
 100         { NULL,       -1,                       0},
 101 };
 102
 103 static const struct bond_opt_value bond_arp_validate_tbl[] = {
 104         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
 105         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
 106         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
 107         { "all",                BOND_ARP_VALIDATE_ALL,          0},
 108         { "filter",             BOND_ARP_FILTER,                0},
 109         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
 110         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
 111         { NULL,                 -1,                             0},
 112 };
 113
 114 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
 115         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
 116         { "all", BOND_ARP_TARGETS_ALL, 0},
 117         { NULL,  -1,                   0},
 118 };
 119
 120 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
 121         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
 122         { "active", BOND_FOM_ACTIVE, 0},
 123         { "follow", BOND_FOM_FOLLOW, 0},
 124         { NULL,     -1,              0},
 125 };
 126
 127 static const struct bond_opt_value bond_intmax_tbl[] = {
 128         { "off",     0,       BOND_VALFLAG_DEFAULT},
 129         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 130 };
 131
 132 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
 133         { "slow", AD_LACP_SLOW, 0},
 134         { "fast", AD_LACP_FAST, 0},
 135         { NULL,   -1,           0},
 136 };
 137
 138 static const struct bond_opt_value bond_ad_select_tbl[] = {
 139         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
 140         { "bandwidth", BOND_AD_BANDWIDTH, 0},
 141         { "count",     BOND_AD_COUNT,     0},
 142         { NULL,        -1,                0},
 143 };
 144
 145 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
 146         { "off",     0,   0},
 147         { "maxval",  255, BOND_VALFLAG_MAX},
 148         { "default", 1,   BOND_VALFLAG_DEFAULT},
 149         { NULL,      -1,  0}
 150 };
 151
 152 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
 153         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
 154         { "better",  BOND_PRI_RESELECT_BETTER,  0},
 155         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
 156         { NULL,      -1},
 157 };
 158
 159 static const struct bond_opt_value bond_use_carrier_tbl[] = {
 160         { "off", 0,  0},
 161         { "on",  1,  BOND_VALFLAG_DEFAULT},
 162         { NULL,  -1, 0}
 163 };
 164
 165 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
 166         { "off", 0,  BOND_VALFLAG_DEFAULT},
 167         { "on",  1,  0},
 168         { NULL,  -1, 0}
 169 };
 170
 171 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
 172         { "off",     0,   0},
 173         { "maxval",  255, BOND_VALFLAG_MAX},
 174         { "default", 1,   BOND_VALFLAG_DEFAULT},
 175         { NULL,      -1,  0}
 176 };
 177
 178 static const struct bond_opt_value bond_lp_interval_tbl[] = {
 179         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
 180         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
 181         { NULL,      -1,      0},
 182 };
 183
 184 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
 185         { "off", 0,  0},
 186         { "on",  1,  BOND_VALFLAG_DEFAULT},
 187         { NULL,  -1, 0}
 188 };
 189
 190 static const struct bond_option bond_opts[] = {
 191         [BOND_OPT_MODE] = {
 192                 .id = BOND_OPT_MODE,
 193                 .name = "mode",
 194                 .desc = "bond device mode",
 195                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
 196                 .values = bond_mode_tbl,
 197                 .set = bond_option_mode_set
 198         },
 199         [BOND_OPT_PACKETS_PER_SLAVE] = {
 200                 .id = BOND_OPT_PACKETS_PER_SLAVE,
 201                 .name = "packets_per_slave",
 202                 .desc = "Packets to send per slave in RR mode",
 203                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
 204                 .values = bond_pps_tbl,
 205                 .set = bond_option_pps_set
 206         },
 207         [BOND_OPT_XMIT_HASH] = {
 208                 .id = BOND_OPT_XMIT_HASH,
 209                 .name = "xmit_hash_policy",
 210                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
 211                 .values = bond_xmit_hashtype_tbl,
 212                 .set = bond_option_xmit_hash_policy_set
 213         },
 214         [BOND_OPT_ARP_VALIDATE] = {
 215                 .id = BOND_OPT_ARP_VALIDATE,
 216                 .name = "arp_validate",
 217                 .desc = "validate src/dst of ARP probes",
 218                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 219                                BIT(BOND_MODE_ALB),
 220                 .values = bond_arp_validate_tbl,
 221                 .set = bond_option_arp_validate_set
 222         },
 223         [BOND_OPT_ARP_ALL_TARGETS] = {
 224                 .id = BOND_OPT_ARP_ALL_TARGETS,
 225                 .name = "arp_all_targets",
 226                 .desc = "fail on any/all arp targets timeout",
 227                 .values = bond_arp_all_targets_tbl,
 228                 .set = bond_option_arp_all_targets_set
 229         },
 230         [BOND_OPT_FAIL_OVER_MAC] = {
 231                 .id = BOND_OPT_FAIL_OVER_MAC,
 232                 .name = "fail_over_mac",
 233                 .desc = "For active-backup, do not set all slaves to the same MAC",
 234                 .flags = BOND_OPTFLAG_NOSLAVES,
 235                 .values = bond_fail_over_mac_tbl,
 236                 .set = bond_option_fail_over_mac_set
 237         },
 238         [BOND_OPT_ARP_INTERVAL] = {
 239                 .id = BOND_OPT_ARP_INTERVAL,
 240                 .name = "arp_interval",
 241                 .desc = "arp interval in milliseconds",
 242                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
 243                                BIT(BOND_MODE_ALB),
 244                 .values = bond_intmax_tbl,
 245                 .set = bond_option_arp_interval_set
 246         },
 247         [BOND_OPT_ARP_TARGETS] = {
 248                 .id = BOND_OPT_ARP_TARGETS,
 249                 .name = "arp_ip_target",
 250                 .desc = "arp targets in n.n.n.n form",
 251                 .flags = BOND_OPTFLAG_RAWVAL,
 252                 .set = bond_option_arp_ip_targets_set
 253         },
 254         [BOND_OPT_DOWNDELAY] = {
 255                 .id = BOND_OPT_DOWNDELAY,
 256                 .name = "downdelay",
 257                 .desc = "Delay before considering link down, in milliseconds",
 258                 .values = bond_intmax_tbl,
 259                 .set = bond_option_downdelay_set
 260         },
 261         [BOND_OPT_UPDELAY] = {
 262                 .id = BOND_OPT_UPDELAY,
 263                 .name = "updelay",
 264                 .desc = "Delay before considering link up, in milliseconds",
 265                 .values = bond_intmax_tbl,
 266                 .set = bond_option_updelay_set
 267         },
 268         [BOND_OPT_LACP_RATE] = {
 269                 .id = BOND_OPT_LACP_RATE,
 270                 .name = "lacp_rate",
 271                 .desc = "LACPDU tx rate to request from 802.3ad partner",
 272                 .flags = BOND_OPTFLAG_IFDOWN,
 273                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
 274                 .values = bond_lacp_rate_tbl,
 275                 .set = bond_option_lacp_rate_set
 276         },
 277         [BOND_OPT_MINLINKS] = {
 278                 .id = BOND_OPT_MINLINKS,
 279                 .name = "min_links",
 280                 .desc = "Minimum number of available links before turning on carrier",
 281                 .values = bond_intmax_tbl,
 282                 .set = bond_option_min_links_set
 283         },
 284         [BOND_OPT_AD_SELECT] = {
 285                 .id = BOND_OPT_AD_SELECT,
 286                 .name = "ad_select",
 287                 .desc = "803.ad aggregation selection logic",
 288                 .flags = BOND_OPTFLAG_IFDOWN,
 289                 .values = bond_ad_select_tbl,
 290                 .set = bond_option_ad_select_set
 291         },
 292         [BOND_OPT_NUM_PEER_NOTIF] = {
 293                 .id = BOND_OPT_NUM_PEER_NOTIF,
 294                 .name = "num_unsol_na",
 295                 .desc = "Number of peer notifications to send on failover event",
 296                 .values = bond_num_peer_notif_tbl,
 297                 .set = bond_option_num_peer_notif_set
 298         },
 299         [BOND_OPT_MIIMON] = {
 300                 .id = BOND_OPT_MIIMON,
 301                 .name = "miimon",
 302                 .desc = "Link check interval in milliseconds",
 303                 .values = bond_intmax_tbl,
 304                 .set = bond_option_miimon_set
 305         },
 306         [BOND_OPT_PRIMARY] = {
 307                 .id = BOND_OPT_PRIMARY,
 308                 .name = "primary",
 309                 .desc = "Primary network device to use",
 310                 .flags = BOND_OPTFLAG_RAWVAL,
 311                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 312                                                 BIT(BOND_MODE_TLB) |
 313                                                 BIT(BOND_MODE_ALB)),
 314                 .set = bond_option_primary_set
 315         },
 316         [BOND_OPT_PRIMARY_RESELECT] = {
 317                 .id = BOND_OPT_PRIMARY_RESELECT,
 318                 .name = "primary_reselect",
 319                 .desc = "Reselect primary slave once it comes up",
 320                 .values = bond_primary_reselect_tbl,
 321                 .set = bond_option_primary_reselect_set
 322         },
 323         [BOND_OPT_USE_CARRIER] = {
 324                 .id = BOND_OPT_USE_CARRIER,
 325                 .name = "use_carrier",
 326                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
 327                 .values = bond_use_carrier_tbl,
 328                 .set = bond_option_use_carrier_set
 329         },
 330         [BOND_OPT_ACTIVE_SLAVE] = {
 331                 .id = BOND_OPT_ACTIVE_SLAVE,
 332                 .name = "active_slave",
 333                 .desc = "Currently active slave",
 334                 .flags = BOND_OPTFLAG_RAWVAL,
 335                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
 336                                                 BIT(BOND_MODE_TLB) |
 337                                                 BIT(BOND_MODE_ALB)),
 338                 .set = bond_option_active_slave_set
 339         },
 340         [BOND_OPT_QUEUE_ID] = {
 341                 .id = BOND_OPT_QUEUE_ID,
 342                 .name = "queue_id",
 343                 .desc = "Set queue id of a slave",
 344                 .flags = BOND_OPTFLAG_RAWVAL,
 345                 .set = bond_option_queue_id_set
 346         },
 347         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
 348                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
 349                 .name = "all_slaves_active",
 350                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
 351                 .values = bond_all_slaves_active_tbl,
 352                 .set = bond_option_all_slaves_active_set
 353         },
 354         [BOND_OPT_RESEND_IGMP] = {
 355                 .id = BOND_OPT_RESEND_IGMP,
 356                 .name = "resend_igmp",
 357                 .desc = "Number of IGMP membership reports to send on link failure",
 358                 .values = bond_resend_igmp_tbl,
 359                 .set = bond_option_resend_igmp_set
 360         },
 361         [BOND_OPT_LP_INTERVAL] = {
 362                 .id = BOND_OPT_LP_INTERVAL,
 363                 .name = "lp_interval",
 364                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
 365                 .values = bond_lp_interval_tbl,
 366                 .set = bond_option_lp_interval_set
 367         },
 368         [BOND_OPT_SLAVES] = {
 369                 .id = BOND_OPT_SLAVES,
 370                 .name = "slaves",
 371                 .desc = "Slave membership management",
 372                 .flags = BOND_OPTFLAG_RAWVAL,
 373                 .set = bond_option_slaves_set
 374         },
 375         [BOND_OPT_TLB_DYNAMIC_LB] = {
 376                 .id = BOND_OPT_TLB_DYNAMIC_LB,
 377                 .name = "dynamic_lb",
 378                 .desc = "Enable dynamic flow shuffling",
 379                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
 380                 .values = bond_tlb_dynamic_lb_tbl,
 381                 .flags = BOND_OPTFLAG_IFDOWN,
 382                 .set = bond_option_tlb_dynamic_lb_set,
 383         },
 384         { }
 385 };
 386
 387 /* Searches for a value in opt's values[] table */
 388 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
 389 {
 390         const struct bond_option *opt;
 391         int i;
 392
 393         opt = bond_opt_get(option);
 394         if (WARN_ON(!opt))
 395                 return NULL;
 396         for (i = 0; opt->values && opt->values[i].string; i++)
 397                 if (opt->values[i].value == val)
 398                         return &opt->values[i];
 399
 400         return NULL;
 401 }
 402
 403 /* Searches for a value in opt's values[] table which matches the flagmask */
 404 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
 405                                                  u32 flagmask)
 406 {
 407         int i;
 408
 409         for (i = 0; opt->values && opt->values[i].string; i++)
 410                 if (opt->values[i].flags & flagmask)
 411                         return &opt->values[i];
 412
 413         return NULL;
 414 }
 415
 416 /* If maxval is missing then there's no range to check. In case minval is
 417  * missing then it's considered to be 0.
 418  */
 419 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
 420 {
 421         const struct bond_opt_value *minval, *maxval;
 422
 423         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 424         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 425         if (!maxval || (minval && val < minval->value) || val > maxval->value)
 426                 return false;
 427
 428         return true;
 429 }
 430
 431 /**
 432  * bond_opt_parse - parse option value
 433  * @opt: the option to parse against
 434  * @val: value to parse
 435  *
 436  * This function tries to extract the value from @val and check if it's
 437  * a possible match for the option and returns NULL if a match isn't found,
 438  * or the struct_opt_value that matched. It also strips the new line from
 439  * @val->string if it's present.
 440  */
 441 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 442                                             struct bond_opt_value *val)
 443 {
 444         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
 445         const struct bond_opt_value *tbl;
 446         const struct bond_opt_value *ret = NULL;
 447         bool checkval;
 448         int i, rv;
 449
 450         /* No parsing if the option wants a raw val */
 451         if (opt->flags & BOND_OPTFLAG_RAWVAL)
 452                 return val;
 453
 454         tbl = opt->values;
 455         if (!tbl)
 456                 goto out;
 457
 458         /* ULLONG_MAX is used to bypass string processing */
 459         checkval = val->value != ULLONG_MAX;
 460         if (!checkval) {
 461                 if (!val->string)
 462                         goto out;
 463                 p = strchr(val->string, '\n');
 464                 if (p)
 465                         *p = '\0';
 466                 for (p = val->string; *p; p++)
 467                         if (!(isdigit(*p) || isspace(*p)))
 468                                 break;
 469                 /* The following code extracts the string to match or the value
 470                  * and sets checkval appropriately
 471                  */
 472                 if (*p) {
 473                         rv = sscanf(val->string, "%32s", valstr);
 474                 } else {
 475                         rv = sscanf(val->string, "%llu", &val->value);
 476                         checkval = true;
 477                 }
 478                 if (!rv)
 479                         goto out;
 480         }
 481
 482         for (i = 0; tbl[i].string; i++) {
 483                 /* Check for exact match */
 484                 if (checkval) {
 485                         if (val->value == tbl[i].value)
 486                                 ret = &tbl[i];
 487                 } else {
 488                         if (!strcmp(valstr, "default") &&
 489                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
 490                                 ret = &tbl[i];
 491
 492                         if (!strcmp(valstr, tbl[i].string))
 493                                 ret = &tbl[i];
 494                 }
 495                 /* Found an exact match */
 496                 if (ret)
 497                         goto out;
 498         }
 499         /* Possible range match */
 500         if (checkval && bond_opt_check_range(opt, val->value))
 501                 ret = val;
 502 out:
 503         return ret;
 504 }
 505
 506 /* Check opt's dependencies against bond mode and currently set options */
 507 static int bond_opt_check_deps(struct bonding *bond,
 508                                const struct bond_option *opt)
 509 {
 510         struct bond_params *params = &bond->params;
 511
 512         if (test_bit(params->mode, &opt->unsuppmodes))
 513                 return -EACCES;
 514         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
 515                 return -ENOTEMPTY;
 516         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
 517                 return -EBUSY;
 518
 519         return 0;
 520 }
 521
 522 static void bond_opt_dep_print(struct bonding *bond,
 523                                const struct bond_option *opt)
 524 {
 525         const struct bond_opt_value *modeval;
 526         struct bond_params *params;
 527
 528         params = &bond->params;
 529         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
 530         if (test_bit(params->mode, &opt->unsuppmodes))
 531                 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
 532                        bond->dev->name, opt->name,
 533                        modeval->string, modeval->value);
 534 }
 535
 536 static void bond_opt_error_interpret(struct bonding *bond,
 537                                      const struct bond_option *opt,
 538                                      int error, const struct bond_opt_value *val)
 539 {
 540         const struct bond_opt_value *minval, *maxval;
 541         char *p;
 542
 543         switch (error) {
 544         case -EINVAL:
 545                 if (val) {
 546                         if (val->string) {
 547                                 /* sometimes RAWVAL opts may have new lines */
 548                                 p = strchr(val->string, '\n');
 549                                 if (p)
 550                                         *p = '\0';
 551                                 pr_err("%s: option %s: invalid value (%s)\n",
 552                                        bond->dev->name, opt->name, val->string);
 553                         } else {
 554                                 pr_err("%s: option %s: invalid value (%llu)\n",
 555                                        bond->dev->name, opt->name, val->value);
 556                         }
 557                 }
 558                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
 559                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
 560                 if (!maxval)
 561                         break;
 562                 pr_err("%s: option %s: allowed values %llu - %llu\n",
 563                        bond->dev->name, opt->name, minval ? minval->value : 0,
 564                        maxval->value);
 565                 break;
 566         case -EACCES:
 567                 bond_opt_dep_print(bond, opt);
 568                 break;
 569         case -ENOTEMPTY:
 570                 pr_err("%s: option %s: unable to set because the bond device has slaves\n",
 571                        bond->dev->name, opt->name);
 572                 break;
 573         case -EBUSY:
 574                 pr_err("%s: option %s: unable to set because the bond device is up\n",
 575                        bond->dev->name, opt->name);
 576                 break;
 577         default:
 578                 break;
 579         }
 580 }
 581
 582 /**
 583  * __bond_opt_set - set a bonding option
 584  * @bond: target bond device
 585  * @option: option to set
 586  * @val: value to set it to
 587  *
 588  * This function is used to change the bond's option value, it can be
 589  * used for both enabling/changing an option and for disabling it. RTNL lock
 590  * must be obtained before calling this function.
 591  */
 592 int __bond_opt_set(struct bonding *bond,
 593                    unsigned int option, struct bond_opt_value *val)
 594 {
 595         const struct bond_opt_value *retval = NULL;
 596         const struct bond_option *opt;
 597         int ret = -ENOENT;
 598
 599         ASSERT_RTNL();
 600
 601         opt = bond_opt_get(option);
 602         if (WARN_ON(!val) || WARN_ON(!opt))
 603                 goto out;
 604         ret = bond_opt_check_deps(bond, opt);
 605         if (ret)
 606                 goto out;
 607         retval = bond_opt_parse(opt, val);
 608         if (!retval) {
 609                 ret = -EINVAL;
 610                 goto out;
 611         }
 612         ret = opt->set(bond, retval);
 613 out:
 614         if (ret)
 615                 bond_opt_error_interpret(bond, opt, ret, val);
 616
 617         return ret;
 618 }
 619
 620 /**
 621  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
 622  * @bond: target bond device
 623  * @option: option to set
 624  * @buf: value to set it to
 625  *
 626  * This function tries to acquire RTNL without blocking and if successful
 627  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
 628  */
 629 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
 630 {
 631         struct bond_opt_value optval;
 632         int ret;
 633
 634         if (!rtnl_trylock())
 635                 return restart_syscall();
 636         bond_opt_initstr(&optval, buf);
 637         ret = __bond_opt_set(bond, option, &optval);
 638         rtnl_unlock();
 639
 640         return ret;
 641 }
 642
 643 /**
 644  * bond_opt_get - get a pointer to an option
 645  * @option: option for which to return a pointer
 646  *
 647  * This function checks if option is valid and if so returns a pointer
 648  * to its entry in the bond_opts[] option array.
 649  */
 650 const struct bond_option *bond_opt_get(unsigned int option)
 651 {
 652         if (!BOND_OPT_VALID(option))
 653                 return NULL;
 654
 655         return &bond_opts[option];
 656 }
 657
 658 int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval)
 659 {
 660         if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
 661                 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
 662                         bond->dev->name, newval->string);
 663                 /* disable arp monitoring */
 664                 bond->params.arp_interval = 0;
 665                 /* set miimon to default value */
 666                 bond->params.miimon = BOND_DEFAULT_MIIMON;
 667                 pr_info("%s: Setting MII monitoring interval to %d\n",
 668                         bond->dev->name, bond->params.miimon);
 669         }
 670
 671         /* don't cache arp_validate between modes */
 672         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 673         bond->params.mode = newval->value;
 674
 675         return 0;
 676 }
 677
 678 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
 679                                                          struct slave *slave)
 680 {
 681         return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
 682 }
 683
 684 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
 685 {
 686         struct slave *slave = rcu_dereference(bond->curr_active_slave);
 687
 688         return __bond_option_active_slave_get(bond, slave);
 689 }
 690
 691 struct net_device *bond_option_active_slave_get(struct bonding *bond)
 692 {
 693         return __bond_option_active_slave_get(bond, bond->curr_active_slave);
 694 }
 695
 696 static int bond_option_active_slave_set(struct bonding *bond,
 697                                         const struct bond_opt_value *newval)
 698 {
 699         char ifname[IFNAMSIZ] = { 0, };
 700         struct net_device *slave_dev;
 701         int ret = 0;
 702
 703         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
 704         if (!strlen(ifname) || newval->string[0] == '\n') {
 705                 slave_dev = NULL;
 706         } else {
 707                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 708                 if (!slave_dev)
 709                         return -ENODEV;
 710         }
 711
 712         if (slave_dev) {
 713                 if (!netif_is_bond_slave(slave_dev)) {
 714                         pr_err("Device %s is not bonding slave\n",
 715                                slave_dev->name);
 716                         return -EINVAL;
 717                 }
 718
 719                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
 720                         pr_err("%s: Device %s is not our slave\n",
 721                                bond->dev->name, slave_dev->name);
 722                         return -EINVAL;
 723                 }
 724         }
 725
 726         block_netpoll_tx();
 727         write_lock_bh(&bond->curr_slave_lock);
 728
 729         /* check to see if we are clearing active */
 730         if (!slave_dev) {
 731                 pr_info("%s: Clearing current active slave\n", bond->dev->name);
 732                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
 733                 bond_select_active_slave(bond);
 734         } else {
 735                 struct slave *old_active = bond->curr_active_slave;
 736                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
 737
 738                 BUG_ON(!new_active);
 739
 740                 if (new_active == old_active) {
 741                         /* do nothing */
 742                         pr_info("%s: %s is already the current active slave\n",
 743                                 bond->dev->name, new_active->dev->name);
 744                 } else {
 745                         if (old_active && (new_active->link == BOND_LINK_UP) &&
 746                             IS_UP(new_active->dev)) {
 747                                 pr_info("%s: Setting %s as active slave\n",
 748                                         bond->dev->name, new_active->dev->name);
 749                                 bond_change_active_slave(bond, new_active);
 750                         } else {
 751                                 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n",
 752                                        bond->dev->name, new_active->dev->name,
 753                                        new_active->dev->name);
 754                                 ret = -EINVAL;
 755                         }
 756                 }
 757         }
 758
 759         write_unlock_bh(&bond->curr_slave_lock);
 760         unblock_netpoll_tx();
 761
 762         return ret;
 763 }
 764
 765 static int bond_option_miimon_set(struct bonding *bond,
 766                                   const struct bond_opt_value *newval)
 767 {
 768         pr_info("%s: Setting MII monitoring interval to %llu\n",
 769                 bond->dev->name, newval->value);
 770         bond->params.miimon = newval->value;
 771         if (bond->params.updelay)
 772                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
 773                         bond->dev->name,
 774                         bond->params.updelay * bond->params.miimon);
 775         if (bond->params.downdelay)
 776                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
 777                         bond->dev->name,
 778                         bond->params.downdelay * bond->params.miimon);
 779         if (newval->value && bond->params.arp_interval) {
 780                 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n",
 781                         bond->dev->name);
 782                 bond->params.arp_interval = 0;
 783                 if (bond->params.arp_validate)
 784                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 785         }
 786         if (bond->dev->flags & IFF_UP) {
 787                 /* If the interface is up, we may need to fire off
 788                  * the MII timer. If the interface is down, the
 789                  * timer will get fired off when the open function
 790                  * is called.
 791                  */
 792                 if (!newval->value) {
 793                         cancel_delayed_work_sync(&bond->mii_work);
 794                 } else {
 795                         cancel_delayed_work_sync(&bond->arp_work);
 796                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
 797                 }
 798         }
 799
 800         return 0;
 801 }
 802
 803 static int bond_option_updelay_set(struct bonding *bond,
 804                                    const struct bond_opt_value *newval)
 805 {
 806         int value = newval->value;
 807
 808         if (!bond->params.miimon) {
 809                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 810                        bond->dev->name);
 811                 return -EPERM;
 812         }
 813         if ((value % bond->params.miimon) != 0) {
 814                 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 815                         bond->dev->name, value,
 816                         bond->params.miimon,
 817                         (value / bond->params.miimon) *
 818                         bond->params.miimon);
 819         }
 820         bond->params.updelay = value / bond->params.miimon;
 821         pr_info("%s: Setting up delay to %d\n",
 822                 bond->dev->name, bond->params.updelay * bond->params.miimon);
 823
 824         return 0;
 825 }
 826
 827 static int bond_option_downdelay_set(struct bonding *bond,
 828                                      const struct bond_opt_value *newval)
 829 {
 830         int value = newval->value;
 831
 832         if (!bond->params.miimon) {
 833                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 834                        bond->dev->name);
 835                 return -EPERM;
 836         }
 837         if ((value % bond->params.miimon) != 0) {
 838                 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 839                         bond->dev->name, value,
 840                         bond->params.miimon,
 841                         (value / bond->params.miimon) *
 842                         bond->params.miimon);
 843         }
 844         bond->params.downdelay = value / bond->params.miimon;
 845         pr_info("%s: Setting down delay to %d\n",
 846                 bond->dev->name, bond->params.downdelay * bond->params.miimon);
 847
 848         return 0;
 849 }
 850
 851 static int bond_option_use_carrier_set(struct bonding *bond,
 852                                        const struct bond_opt_value *newval)
 853 {
 854         pr_info("%s: Setting use_carrier to %llu\n",
 855                 bond->dev->name, newval->value);
 856         bond->params.use_carrier = newval->value;
 857
 858         return 0;
 859 }
 860
 861 static int bond_option_arp_interval_set(struct bonding *bond,
 862                                         const struct bond_opt_value *newval)
 863 {
 864         pr_info("%s: Setting ARP monitoring interval to %llu\n",
 865                 bond->dev->name, newval->value);
 866         bond->params.arp_interval = newval->value;
 867         if (newval->value) {
 868                 if (bond->params.miimon) {
 869                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n",
 870                                 bond->dev->name, bond->dev->name);
 871                         bond->params.miimon = 0;
 872                 }
 873                 if (!bond->params.arp_targets[0])
 874                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n",
 875                                 bond->dev->name);
 876         }
 877         if (bond->dev->flags & IFF_UP) {
 878                 /* If the interface is up, we may need to fire off
 879                  * the ARP timer.  If the interface is down, the
 880                  * timer will get fired off when the open function
 881                  * is called.
 882                  */
 883                 if (!newval->value) {
 884                         if (bond->params.arp_validate)
 885                                 bond->recv_probe = NULL;
 886                         cancel_delayed_work_sync(&bond->arp_work);
 887                 } else {
 888                         /* arp_validate can be set only in active-backup mode */
 889                         bond->recv_probe = bond_arp_rcv;
 890                         cancel_delayed_work_sync(&bond->mii_work);
 891                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 892                 }
 893         }
 894
 895         return 0;
 896 }
 897
 898 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
 899                                             __be32 target,
 900                                             unsigned long last_rx)
 901 {
 902         __be32 *targets = bond->params.arp_targets;
 903         struct list_head *iter;
 904         struct slave *slave;
 905
 906         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
 907                 bond_for_each_slave(bond, slave, iter)
 908                         slave->target_last_arp_rx[slot] = last_rx;
 909                 targets[slot] = target;
 910         }
 911 }
 912
 913 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 914 {
 915         __be32 *targets = bond->params.arp_targets;
 916         int ind;
 917
 918         if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
 919                 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 920                        bond->dev->name, &target);
 921                 return -EINVAL;
 922         }
 923
 924         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
 925                 pr_err("%s: ARP target %pI4 is already present\n",
 926                        bond->dev->name, &target);
 927                 return -EINVAL;
 928         }
 929
 930         ind = bond_get_targets_ip(targets, 0); /* first free slot */
 931         if (ind == -1) {
 932                 pr_err("%s: ARP target table is full!\n", bond->dev->name);
 933                 return -EINVAL;
 934         }
 935
 936         pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target);
 937
 938         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
 939
 940         return 0;
 941 }
 942
 943 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
 944 {
 945         int ret;
 946
 947         /* not to race with bond_arp_rcv */
 948         write_lock_bh(&bond->lock);
 949         ret = _bond_option_arp_ip_target_add(bond, target);
 950         write_unlock_bh(&bond->lock);
 951
 952         return ret;
 953 }
 954
 955 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
 956 {
 957         __be32 *targets = bond->params.arp_targets;
 958         struct list_head *iter;
 959         struct slave *slave;
 960         unsigned long *targets_rx;
 961         int ind, i;
 962
 963         if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
 964                 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 965                        bond->dev->name, &target);
 966                 return -EINVAL;
 967         }
 968
 969         ind = bond_get_targets_ip(targets, target);
 970         if (ind == -1) {
 971                 pr_err("%s: unable to remove nonexistent ARP target %pI4\n",
 972                        bond->dev->name, &target);
 973                 return -EINVAL;
 974         }
 975
 976         if (ind == 0 && !targets[1] && bond->params.arp_interval)
 977                 pr_warn("%s: Removing last arp target with arp_interval on\n",
 978                         bond->dev->name);
 979
 980         pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target);
 981
 982         /* not to race with bond_arp_rcv */
 983         write_lock_bh(&bond->lock);
 984
 985         bond_for_each_slave(bond, slave, iter) {
 986                 targets_rx = slave->target_last_arp_rx;
 987                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 988                         targets_rx[i] = targets_rx[i+1];
 989                 targets_rx[i] = 0;
 990         }
 991         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
 992                 targets[i] = targets[i+1];
 993         targets[i] = 0;
 994
 995         write_unlock_bh(&bond->lock);
 996
 997         return 0;
 998 }
 999
1000 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1001 {
1002         int i;
1003
1004         /* not to race with bond_arp_rcv */
1005         write_lock_bh(&bond->lock);
1006         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1007                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1008         write_unlock_bh(&bond->lock);
1009 }
1010
1011 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1012                                           const struct bond_opt_value *newval)
1013 {
1014         int ret = -EPERM;
1015         __be32 target;
1016
1017         if (newval->string) {
1018                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1019                         pr_err("%s: invalid ARP target %pI4 specified\n",
1020                                bond->dev->name, &target);
1021                         return ret;
1022                 }
1023                 if (newval->string[0] == '+')
1024                         ret = bond_option_arp_ip_target_add(bond, target);
1025                 else if (newval->string[0] == '-')
1026                         ret = bond_option_arp_ip_target_rem(bond, target);
1027                 else
1028                         pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n",
1029                                bond->dev->name);
1030         } else {
1031                 target = newval->value;
1032                 ret = bond_option_arp_ip_target_add(bond, target);
1033         }
1034
1035         return ret;
1036 }
1037
1038 static int bond_option_arp_validate_set(struct bonding *bond,
1039                                         const struct bond_opt_value *newval)
1040 {
1041         pr_info("%s: Setting arp_validate to %s (%llu)\n",
1042                 bond->dev->name, newval->string, newval->value);
1043
1044         if (bond->dev->flags & IFF_UP) {
1045                 if (!newval->value)
1046                         bond->recv_probe = NULL;
1047                 else if (bond->params.arp_interval)
1048                         bond->recv_probe = bond_arp_rcv;
1049         }
1050         bond->params.arp_validate = newval->value;
1051
1052         return 0;
1053 }
1054
1055 static int bond_option_arp_all_targets_set(struct bonding *bond,
1056                                            const struct bond_opt_value *newval)
1057 {
1058         pr_info("%s: Setting arp_all_targets to %s (%llu)\n",
1059                 bond->dev->name, newval->string, newval->value);
1060         bond->params.arp_all_targets = newval->value;
1061
1062         return 0;
1063 }
1064
1065 static int bond_option_primary_set(struct bonding *bond,
1066                                    const struct bond_opt_value *newval)
1067 {
1068         char *p, *primary = newval->string;
1069         struct list_head *iter;
1070         struct slave *slave;
1071
1072         block_netpoll_tx();
1073         read_lock(&bond->lock);
1074         write_lock_bh(&bond->curr_slave_lock);
1075
1076         p = strchr(primary, '\n');
1077         if (p)
1078                 *p = '\0';
1079         /* check to see if we are clearing primary */
1080         if (!strlen(primary)) {
1081                 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1082                 bond->primary_slave = NULL;
1083                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1084                 bond_select_active_slave(bond);
1085                 goto out;
1086         }
1087
1088         bond_for_each_slave(bond, slave, iter) {
1089                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1090                         pr_info("%s: Setting %s as primary slave\n",
1091                                 bond->dev->name, slave->dev->name);
1092                         bond->primary_slave = slave;
1093                         strcpy(bond->params.primary, slave->dev->name);
1094                         bond_select_active_slave(bond);
1095                         goto out;
1096                 }
1097         }
1098
1099         if (bond->primary_slave) {
1100                 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1101                 bond->primary_slave = NULL;
1102                 bond_select_active_slave(bond);
1103         }
1104         strncpy(bond->params.primary, primary, IFNAMSIZ);
1105         bond->params.primary[IFNAMSIZ - 1] = 0;
1106
1107         pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n",
1108                 bond->dev->name, primary, bond->dev->name);
1109
1110 out:
1111         write_unlock_bh(&bond->curr_slave_lock);
1112         read_unlock(&bond->lock);
1113         unblock_netpoll_tx();
1114
1115         return 0;
1116 }
1117
1118 static int bond_option_primary_reselect_set(struct bonding *bond,
1119                                             const struct bond_opt_value *newval)
1120 {
1121         pr_info("%s: Setting primary_reselect to %s (%llu)\n",
1122                 bond->dev->name, newval->string, newval->value);
1123         bond->params.primary_reselect = newval->value;
1124
1125         block_netpoll_tx();
1126         write_lock_bh(&bond->curr_slave_lock);
1127         bond_select_active_slave(bond);
1128         write_unlock_bh(&bond->curr_slave_lock);
1129         unblock_netpoll_tx();
1130
1131         return 0;
1132 }
1133
1134 static int bond_option_fail_over_mac_set(struct bonding *bond,
1135                                          const struct bond_opt_value *newval)
1136 {
1137         pr_info("%s: Setting fail_over_mac to %s (%llu)\n",
1138                 bond->dev->name, newval->string, newval->value);
1139         bond->params.fail_over_mac = newval->value;
1140
1141         return 0;
1142 }
1143
1144 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1145                                             const struct bond_opt_value *newval)
1146 {
1147         pr_info("%s: Setting xmit hash policy to %s (%llu)\n",
1148                 bond->dev->name, newval->string, newval->value);
1149         bond->params.xmit_policy = newval->value;
1150
1151         return 0;
1152 }
1153
1154 static int bond_option_resend_igmp_set(struct bonding *bond,
1155                                        const struct bond_opt_value *newval)
1156 {
1157         pr_info("%s: Setting resend_igmp to %llu\n",
1158                 bond->dev->name, newval->value);
1159         bond->params.resend_igmp = newval->value;
1160
1161         return 0;
1162 }
1163
1164 static int bond_option_num_peer_notif_set(struct bonding *bond,
1165                                    const struct bond_opt_value *newval)
1166 {
1167         bond->params.num_peer_notif = newval->value;
1168
1169         return 0;
1170 }
1171
1172 static int bond_option_all_slaves_active_set(struct bonding *bond,
1173                                              const struct bond_opt_value *newval)
1174 {
1175         struct list_head *iter;
1176         struct slave *slave;
1177
1178         if (newval->value == bond->params.all_slaves_active)
1179                 return 0;
1180         bond->params.all_slaves_active = newval->value;
1181         bond_for_each_slave(bond, slave, iter) {
1182                 if (!bond_is_active_slave(slave)) {
1183                         if (newval->value)
1184                                 slave->inactive = 0;
1185                         else
1186                                 slave->inactive = 1;
1187                 }
1188         }
1189
1190         return 0;
1191 }
1192
1193 static int bond_option_min_links_set(struct bonding *bond,
1194                                      const struct bond_opt_value *newval)
1195 {
1196         pr_info("%s: Setting min links value to %llu\n",
1197                 bond->dev->name, newval->value);
1198         bond->params.min_links = newval->value;
1199
1200         return 0;
1201 }
1202
1203 static int bond_option_lp_interval_set(struct bonding *bond,
1204                                        const struct bond_opt_value *newval)
1205 {
1206         bond->params.lp_interval = newval->value;
1207
1208         return 0;
1209 }
1210
1211 static int bond_option_pps_set(struct bonding *bond,
1212                                const struct bond_opt_value *newval)
1213 {
1214         bond->params.packets_per_slave = newval->value;
1215         if (newval->value > 0) {
1216                 bond->params.reciprocal_packets_per_slave =
1217                         reciprocal_value(newval->value);
1218         } else {
1219                 /* reciprocal_packets_per_slave is unused if
1220                  * packets_per_slave is 0 or 1, just initialize it
1221                  */
1222                 bond->params.reciprocal_packets_per_slave =
1223                         (struct reciprocal_value) { 0 };
1224         }
1225
1226         return 0;
1227 }
1228
1229 static int bond_option_lacp_rate_set(struct bonding *bond,
1230                                      const struct bond_opt_value *newval)
1231 {
1232         pr_info("%s: Setting LACP rate to %s (%llu)\n",
1233                 bond->dev->name, newval->string, newval->value);
1234         bond->params.lacp_fast = newval->value;
1235         bond_3ad_update_lacp_rate(bond);
1236
1237         return 0;
1238 }
1239
1240 static int bond_option_ad_select_set(struct bonding *bond,
1241                                      const struct bond_opt_value *newval)
1242 {
1243         pr_info("%s: Setting ad_select to %s (%llu)\n",
1244                 bond->dev->name, newval->string, newval->value);
1245         bond->params.ad_select = newval->value;
1246
1247         return 0;
1248 }
1249
1250 static int bond_option_queue_id_set(struct bonding *bond,
1251                                     const struct bond_opt_value *newval)
1252 {
1253         struct slave *slave, *update_slave;
1254         struct net_device *sdev;
1255         struct list_head *iter;
1256         char *delim;
1257         int ret = 0;
1258         u16 qid;
1259
1260         /* delim will point to queue id if successful */
1261         delim = strchr(newval->string, ':');
1262         if (!delim)
1263                 goto err_no_cmd;
1264
1265         /* Terminate string that points to device name and bump it
1266          * up one, so we can read the queue id there.
1267          */
1268         *delim = '\0';
1269         if (sscanf(++delim, "%hd\n", &qid) != 1)
1270                 goto err_no_cmd;
1271
1272         /* Check buffer length, valid ifname and queue id */
1273         if (!dev_valid_name(newval->string) ||
1274             qid > bond->dev->real_num_tx_queues)
1275                 goto err_no_cmd;
1276
1277         /* Get the pointer to that interface if it exists */
1278         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1279         if (!sdev)
1280                 goto err_no_cmd;
1281
1282         /* Search for thes slave and check for duplicate qids */
1283         update_slave = NULL;
1284         bond_for_each_slave(bond, slave, iter) {
1285                 if (sdev == slave->dev)
1286                         /* We don't need to check the matching
1287                          * slave for dups, since we're overwriting it
1288                          */
1289                         update_slave = slave;
1290                 else if (qid && qid == slave->queue_id) {
1291                         goto err_no_cmd;
1292                 }
1293         }
1294
1295         if (!update_slave)
1296                 goto err_no_cmd;
1297
1298         /* Actually set the qids for the slave */
1299         update_slave->queue_id = qid;
1300
1301 out:
1302         return ret;
1303
1304 err_no_cmd:
1305         pr_info("invalid input for queue_id set for %s\n", bond->dev->name);
1306         ret = -EPERM;
1307         goto out;
1308
1309 }
1310
1311 static int bond_option_slaves_set(struct bonding *bond,
1312                                   const struct bond_opt_value *newval)
1313 {
1314         char command[IFNAMSIZ + 1] = { 0, };
1315         struct net_device *dev;
1316         char *ifname;
1317         int ret;
1318
1319         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1320         ifname = command + 1;
1321         if ((strlen(command) <= 1) ||
1322             !dev_valid_name(ifname))
1323                 goto err_no_cmd;
1324
1325         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1326         if (!dev) {
1327                 pr_info("%s: interface %s does not exist!\n",
1328                         bond->dev->name, ifname);
1329                 ret = -ENODEV;
1330                 goto out;
1331         }
1332
1333         switch (command[0]) {
1334         case '+':
1335                 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name);
1336                 ret = bond_enslave(bond->dev, dev);
1337                 break;
1338
1339         case '-':
1340                 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name);
1341                 ret = bond_release(bond->dev, dev);
1342                 break;
1343
1344         default:
1345                 goto err_no_cmd;
1346         }
1347
1348 out:
1349         return ret;
1350
1351 err_no_cmd:
1352         pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n",
1353                bond->dev->name);
1354         ret = -EPERM;
1355         goto out;
1356 }
1357
1358 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1359                                           const struct bond_opt_value *newval)
1360 {
1361         pr_info("%s: Setting dynamic-lb to %s (%llu)\n",
1362                 bond->dev->name, newval->string, newval->value);
1363         bond->params.tlb_dynamic_lb = newval->value;
1364
1365         return 0;
1366 }