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