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