drivers/net/team/team_mode_loadbalance.c

   1 /*
   2  * drivers/net/team/team_mode_loadbalance.c - Load-balancing mode for team
   3  * Copyright (c) 2012 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/errno.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/filter.h>
  18 #include <linux/if_team.h>
  19
  20 struct lb_priv;
  21
  22 typedef struct team_port *lb_select_tx_port_func_t(struct team *,
  23                                                    struct lb_priv *,
  24                                                    struct sk_buff *,
  25                                                    unsigned char);
  26
  27 #define LB_TX_HASHTABLE_SIZE 256 /* hash is a char */
  28
  29 struct lb_stats {
  30         u64 tx_bytes;
  31 };
  32
  33 struct lb_pcpu_stats {
  34         struct lb_stats hash_stats[LB_TX_HASHTABLE_SIZE];
  35         struct u64_stats_sync syncp;
  36 };
  37
  38 struct lb_stats_info {
  39         struct lb_stats stats;
  40         struct lb_stats last_stats;
  41         struct team_option_inst_info *opt_inst_info;
  42 };
  43
  44 struct lb_port_mapping {
  45         struct team_port __rcu *port;
  46         struct team_option_inst_info *opt_inst_info;
  47 };
  48
  49 struct lb_priv_ex {
  50         struct team *team;
  51         struct lb_port_mapping tx_hash_to_port_mapping[LB_TX_HASHTABLE_SIZE];
  52         struct sock_fprog *orig_fprog;
  53         struct {
  54                 unsigned int refresh_interval; /* in tenths of second */
  55                 struct delayed_work refresh_dw;
  56                 struct lb_stats_info info[LB_TX_HASHTABLE_SIZE];
  57         } stats;
  58 };
  59
  60 struct lb_priv {
  61         struct sk_filter __rcu *fp;
  62         lb_select_tx_port_func_t __rcu *select_tx_port_func;
  63         struct lb_pcpu_stats __percpu *pcpu_stats;
  64         struct lb_priv_ex *ex; /* priv extension */
  65 };
  66
  67 static struct lb_priv *get_lb_priv(struct team *team)
  68 {
  69         return (struct lb_priv *) &team->mode_priv;
  70 }
  71
  72 struct lb_port_priv {
  73         struct lb_stats __percpu *pcpu_stats;
  74         struct lb_stats_info stats_info;
  75 };
  76
  77 static struct lb_port_priv *get_lb_port_priv(struct team_port *port)
  78 {
  79         return (struct lb_port_priv *) &port->mode_priv;
  80 }
  81
  82 #define LB_HTPM_PORT_BY_HASH(lp_priv, hash) \
  83         (lb_priv)->ex->tx_hash_to_port_mapping[hash].port
  84
  85 #define LB_HTPM_OPT_INST_INFO_BY_HASH(lp_priv, hash) \
  86         (lb_priv)->ex->tx_hash_to_port_mapping[hash].opt_inst_info
  87
  88 static void lb_tx_hash_to_port_mapping_null_port(struct team *team,
  89                                                  struct team_port *port)
  90 {
  91         struct lb_priv *lb_priv = get_lb_priv(team);
  92         bool changed = false;
  93         int i;
  94
  95         for (i = 0; i < LB_TX_HASHTABLE_SIZE; i++) {
  96                 struct lb_port_mapping *pm;
  97
  98                 pm = &lb_priv->ex->tx_hash_to_port_mapping[i];
  99                 if (pm->port == port) {
 100                         rcu_assign_pointer(pm->port, NULL);
 101                         team_option_inst_set_change(pm->opt_inst_info);
 102                         changed = true;
 103                 }
 104         }
 105         if (changed)
 106                 team_options_change_check(team);
 107 }
 108
 109 /* Basic tx selection based solely by hash */
 110 static struct team_port *lb_hash_select_tx_port(struct team *team,
 111                                                 struct lb_priv *lb_priv,
 112                                                 struct sk_buff *skb,
 113                                                 unsigned char hash)
 114 {
 115         int port_index;
 116
 117         port_index = hash % team->en_port_count;
 118         return team_get_port_by_index_rcu(team, port_index);
 119 }
 120
 121 /* Hash to port mapping select tx port */
 122 static struct team_port *lb_htpm_select_tx_port(struct team *team,
 123                                                 struct lb_priv *lb_priv,
 124                                                 struct sk_buff *skb,
 125                                                 unsigned char hash)
 126 {
 127         return rcu_dereference_bh(LB_HTPM_PORT_BY_HASH(lb_priv, hash));
 128 }
 129
 130 struct lb_select_tx_port {
 131         char *name;
 132         lb_select_tx_port_func_t *func;
 133 };
 134
 135 static const struct lb_select_tx_port lb_select_tx_port_list[] = {
 136         {
 137                 .name = "hash",
 138                 .func = lb_hash_select_tx_port,
 139         },
 140         {
 141                 .name = "hash_to_port_mapping",
 142                 .func = lb_htpm_select_tx_port,
 143         },
 144 };
 145 #define LB_SELECT_TX_PORT_LIST_COUNT ARRAY_SIZE(lb_select_tx_port_list)
 146
 147 static char *lb_select_tx_port_get_name(lb_select_tx_port_func_t *func)
 148 {
 149         int i;
 150
 151         for (i = 0; i < LB_SELECT_TX_PORT_LIST_COUNT; i++) {
 152                 const struct lb_select_tx_port *item;
 153
 154                 item = &lb_select_tx_port_list[i];
 155                 if (item->func == func)
 156                         return item->name;
 157         }
 158         return NULL;
 159 }
 160
 161 static lb_select_tx_port_func_t *lb_select_tx_port_get_func(const char *name)
 162 {
 163         int i;
 164
 165         for (i = 0; i < LB_SELECT_TX_PORT_LIST_COUNT; i++) {
 166                 const struct lb_select_tx_port *item;
 167
 168                 item = &lb_select_tx_port_list[i];
 169                 if (!strcmp(item->name, name))
 170                         return item->func;
 171         }
 172         return NULL;
 173 }
 174
 175 static unsigned int lb_get_skb_hash(struct lb_priv *lb_priv,
 176                                     struct sk_buff *skb)
 177 {
 178         struct sk_filter *fp;
 179         uint32_t lhash;
 180         unsigned char *c;
 181
 182         fp = rcu_dereference_bh(lb_priv->fp);
 183         if (unlikely(!fp))
 184                 return 0;
 185         lhash = SK_RUN_FILTER(fp, skb);
 186         c = (char *) &lhash;
 187         return c[0] ^ c[1] ^ c[2] ^ c[3];
 188 }
 189
 190 static void lb_update_tx_stats(unsigned int tx_bytes, struct lb_priv *lb_priv,
 191                                struct lb_port_priv *lb_port_priv,
 192                                unsigned char hash)
 193 {
 194         struct lb_pcpu_stats *pcpu_stats;
 195         struct lb_stats *port_stats;
 196         struct lb_stats *hash_stats;
 197
 198         pcpu_stats = this_cpu_ptr(lb_priv->pcpu_stats);
 199         port_stats = this_cpu_ptr(lb_port_priv->pcpu_stats);
 200         hash_stats = &pcpu_stats->hash_stats[hash];
 201         u64_stats_update_begin(&pcpu_stats->syncp);
 202         port_stats->tx_bytes += tx_bytes;
 203         hash_stats->tx_bytes += tx_bytes;
 204         u64_stats_update_end(&pcpu_stats->syncp);
 205 }
 206
 207 static bool lb_transmit(struct team *team, struct sk_buff *skb)
 208 {
 209         struct lb_priv *lb_priv = get_lb_priv(team);
 210         lb_select_tx_port_func_t *select_tx_port_func;
 211         struct team_port *port;
 212         unsigned char hash;
 213         unsigned int tx_bytes = skb->len;
 214
 215         hash = lb_get_skb_hash(lb_priv, skb);
 216         select_tx_port_func = rcu_dereference_bh(lb_priv->select_tx_port_func);
 217         port = select_tx_port_func(team, lb_priv, skb, hash);
 218         if (unlikely(!port))
 219                 goto drop;
 220         skb->dev = port->dev;
 221         if (dev_queue_xmit(skb))
 222                 return false;
 223         lb_update_tx_stats(tx_bytes, lb_priv, get_lb_port_priv(port), hash);
 224         return true;
 225
 226 drop:
 227         dev_kfree_skb_any(skb);
 228         return false;
 229 }
 230
 231 static int lb_bpf_func_get(struct team *team, struct team_gsetter_ctx *ctx)
 232 {
 233         struct lb_priv *lb_priv = get_lb_priv(team);
 234
 235         if (!lb_priv->ex->orig_fprog) {
 236                 ctx->data.bin_val.len = 0;
 237                 ctx->data.bin_val.ptr = NULL;
 238                 return 0;
 239         }
 240         ctx->data.bin_val.len = lb_priv->ex->orig_fprog->len *
 241                                 sizeof(struct sock_filter);
 242         ctx->data.bin_val.ptr = lb_priv->ex->orig_fprog->filter;
 243         return 0;
 244 }
 245
 246 static int __fprog_create(struct sock_fprog **pfprog, u32 data_len,
 247                           const void *data)
 248 {
 249         struct sock_fprog *fprog;
 250         struct sock_filter *filter = (struct sock_filter *) data;
 251
 252         if (data_len % sizeof(struct sock_filter))
 253                 return -EINVAL;
 254         fprog = kmalloc(sizeof(struct sock_fprog), GFP_KERNEL);
 255         if (!fprog)
 256                 return -ENOMEM;
 257         fprog->filter = kmemdup(filter, data_len, GFP_KERNEL);
 258         if (!fprog->filter) {
 259                 kfree(fprog);
 260                 return -ENOMEM;
 261         }
 262         fprog->len = data_len / sizeof(struct sock_filter);
 263         *pfprog = fprog;
 264         return 0;
 265 }
 266
 267 static void __fprog_destroy(struct sock_fprog *fprog)
 268 {
 269         kfree(fprog->filter);
 270         kfree(fprog);
 271 }
 272
 273 static int lb_bpf_func_set(struct team *team, struct team_gsetter_ctx *ctx)
 274 {
 275         struct lb_priv *lb_priv = get_lb_priv(team);
 276         struct sk_filter *fp = NULL;
 277         struct sock_fprog *fprog = NULL;
 278         int err;
 279
 280         if (ctx->data.bin_val.len) {
 281                 err = __fprog_create(&fprog, ctx->data.bin_val.len,
 282                                      ctx->data.bin_val.ptr);
 283                 if (err)
 284                         return err;
 285                 err = sk_unattached_filter_create(&fp, fprog);
 286                 if (err) {
 287                         __fprog_destroy(fprog);
 288                         return err;
 289                 }
 290         }
 291
 292         if (lb_priv->ex->orig_fprog) {
 293                 /* Clear old filter data */
 294                 __fprog_destroy(lb_priv->ex->orig_fprog);
 295                 sk_unattached_filter_destroy(lb_priv->fp);
 296         }
 297
 298         rcu_assign_pointer(lb_priv->fp, fp);
 299         lb_priv->ex->orig_fprog = fprog;
 300         return 0;
 301 }
 302
 303 static int lb_tx_method_get(struct team *team, struct team_gsetter_ctx *ctx)
 304 {
 305         struct lb_priv *lb_priv = get_lb_priv(team);
 306         char *name;
 307
 308         name = lb_select_tx_port_get_name(lb_priv->select_tx_port_func);
 309         BUG_ON(!name);
 310         ctx->data.str_val = name;
 311         return 0;
 312 }
 313
 314 static int lb_tx_method_set(struct team *team, struct team_gsetter_ctx *ctx)
 315 {
 316         struct lb_priv *lb_priv = get_lb_priv(team);
 317         lb_select_tx_port_func_t *func;
 318
 319         func = lb_select_tx_port_get_func(ctx->data.str_val);
 320         if (!func)
 321                 return -EINVAL;
 322         rcu_assign_pointer(lb_priv->select_tx_port_func, func);
 323         return 0;
 324 }
 325
 326 static int lb_tx_hash_to_port_mapping_init(struct team *team,
 327                                            struct team_option_inst_info *info)
 328 {
 329         struct lb_priv *lb_priv = get_lb_priv(team);
 330         unsigned char hash = info->array_index;
 331
 332         LB_HTPM_OPT_INST_INFO_BY_HASH(lb_priv, hash) = info;
 333         return 0;
 334 }
 335
 336 static int lb_tx_hash_to_port_mapping_get(struct team *team,
 337                                           struct team_gsetter_ctx *ctx)
 338 {
 339         struct lb_priv *lb_priv = get_lb_priv(team);
 340         struct team_port *port;
 341         unsigned char hash = ctx->info->array_index;
 342
 343         port = LB_HTPM_PORT_BY_HASH(lb_priv, hash);
 344         ctx->data.u32_val = port ? port->dev->ifindex : 0;
 345         return 0;
 346 }
 347
 348 static int lb_tx_hash_to_port_mapping_set(struct team *team,
 349                                           struct team_gsetter_ctx *ctx)
 350 {
 351         struct lb_priv *lb_priv = get_lb_priv(team);
 352         struct team_port *port;
 353         unsigned char hash = ctx->info->array_index;
 354
 355         list_for_each_entry(port, &team->port_list, list) {
 356                 if (ctx->data.u32_val == port->dev->ifindex) {
 357                         rcu_assign_pointer(LB_HTPM_PORT_BY_HASH(lb_priv, hash),
 358                                            port);
 359                         return 0;
 360                 }
 361         }
 362         return -ENODEV;
 363 }
 364
 365 static int lb_hash_stats_init(struct team *team,
 366                               struct team_option_inst_info *info)
 367 {
 368         struct lb_priv *lb_priv = get_lb_priv(team);
 369         unsigned char hash = info->array_index;
 370
 371         lb_priv->ex->stats.info[hash].opt_inst_info = info;
 372         return 0;
 373 }
 374
 375 static int lb_hash_stats_get(struct team *team, struct team_gsetter_ctx *ctx)
 376 {
 377         struct lb_priv *lb_priv = get_lb_priv(team);
 378         unsigned char hash = ctx->info->array_index;
 379
 380         ctx->data.bin_val.ptr = &lb_priv->ex->stats.info[hash].stats;
 381         ctx->data.bin_val.len = sizeof(struct lb_stats);
 382         return 0;
 383 }
 384
 385 static int lb_port_stats_init(struct team *team,
 386                               struct team_option_inst_info *info)
 387 {
 388         struct team_port *port = info->port;
 389         struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
 390
 391         lb_port_priv->stats_info.opt_inst_info = info;
 392         return 0;
 393 }
 394
 395 static int lb_port_stats_get(struct team *team, struct team_gsetter_ctx *ctx)
 396 {
 397         struct team_port *port = ctx->info->port;
 398         struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
 399
 400         ctx->data.bin_val.ptr = &lb_port_priv->stats_info.stats;
 401         ctx->data.bin_val.len = sizeof(struct lb_stats);
 402         return 0;
 403 }
 404
 405 static void __lb_stats_info_refresh_prepare(struct lb_stats_info *s_info)
 406 {
 407         memcpy(&s_info->last_stats, &s_info->stats, sizeof(struct lb_stats));
 408         memset(&s_info->stats, 0, sizeof(struct lb_stats));
 409 }
 410
 411 static bool __lb_stats_info_refresh_check(struct lb_stats_info *s_info,
 412                                           struct team *team)
 413 {
 414         if (memcmp(&s_info->last_stats, &s_info->stats,
 415             sizeof(struct lb_stats))) {
 416                 team_option_inst_set_change(s_info->opt_inst_info);
 417                 return true;
 418         }
 419         return false;
 420 }
 421
 422 static void __lb_one_cpu_stats_add(struct lb_stats *acc_stats,
 423                                    struct lb_stats *cpu_stats,
 424                                    struct u64_stats_sync *syncp)
 425 {
 426         unsigned int start;
 427         struct lb_stats tmp;
 428
 429         do {
 430                 start = u64_stats_fetch_begin_bh(syncp);
 431                 tmp.tx_bytes = cpu_stats->tx_bytes;
 432         } while (u64_stats_fetch_retry_bh(syncp, start));
 433         acc_stats->tx_bytes += tmp.tx_bytes;
 434 }
 435
 436 static void lb_stats_refresh(struct work_struct *work)
 437 {
 438         struct team *team;
 439         struct lb_priv *lb_priv;
 440         struct lb_priv_ex *lb_priv_ex;
 441         struct lb_pcpu_stats *pcpu_stats;
 442         struct lb_stats *stats;
 443         struct lb_stats_info *s_info;
 444         struct team_port *port;
 445         bool changed = false;
 446         int i;
 447         int j;
 448
 449         lb_priv_ex = container_of(work, struct lb_priv_ex,
 450                                   stats.refresh_dw.work);
 451
 452         team = lb_priv_ex->team;
 453         lb_priv = get_lb_priv(team);
 454
 455         if (!mutex_trylock(&team->lock)) {
 456                 schedule_delayed_work(&lb_priv_ex->stats.refresh_dw, 0);
 457                 return;
 458         }
 459
 460         for (j = 0; j < LB_TX_HASHTABLE_SIZE; j++) {
 461                 s_info = &lb_priv->ex->stats.info[j];
 462                 __lb_stats_info_refresh_prepare(s_info);
 463                 for_each_possible_cpu(i) {
 464                         pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
 465                         stats = &pcpu_stats->hash_stats[j];
 466                         __lb_one_cpu_stats_add(&s_info->stats, stats,
 467                                                &pcpu_stats->syncp);
 468                 }
 469                 changed |= __lb_stats_info_refresh_check(s_info, team);
 470         }
 471
 472         list_for_each_entry(port, &team->port_list, list) {
 473                 struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
 474
 475                 s_info = &lb_port_priv->stats_info;
 476                 __lb_stats_info_refresh_prepare(s_info);
 477                 for_each_possible_cpu(i) {
 478                         pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
 479                         stats = per_cpu_ptr(lb_port_priv->pcpu_stats, i);
 480                         __lb_one_cpu_stats_add(&s_info->stats, stats,
 481                                                &pcpu_stats->syncp);
 482                 }
 483                 changed |= __lb_stats_info_refresh_check(s_info, team);
 484         }
 485
 486         if (changed)
 487                 team_options_change_check(team);
 488
 489         schedule_delayed_work(&lb_priv_ex->stats.refresh_dw,
 490                               (lb_priv_ex->stats.refresh_interval * HZ) / 10);
 491
 492         mutex_unlock(&team->lock);
 493 }
 494
 495 static int lb_stats_refresh_interval_get(struct team *team,
 496                                          struct team_gsetter_ctx *ctx)
 497 {
 498         struct lb_priv *lb_priv = get_lb_priv(team);
 499
 500         ctx->data.u32_val = lb_priv->ex->stats.refresh_interval;
 501         return 0;
 502 }
 503
 504 static int lb_stats_refresh_interval_set(struct team *team,
 505                                          struct team_gsetter_ctx *ctx)
 506 {
 507         struct lb_priv *lb_priv = get_lb_priv(team);
 508         unsigned int interval;
 509
 510         interval = ctx->data.u32_val;
 511         if (lb_priv->ex->stats.refresh_interval == interval)
 512                 return 0;
 513         lb_priv->ex->stats.refresh_interval = interval;
 514         if (interval)
 515                 schedule_delayed_work(&lb_priv->ex->stats.refresh_dw, 0);
 516         else
 517                 cancel_delayed_work(&lb_priv->ex->stats.refresh_dw);
 518         return 0;
 519 }
 520
 521 static const struct team_option lb_options[] = {
 522         {
 523                 .name = "bpf_hash_func",
 524                 .type = TEAM_OPTION_TYPE_BINARY,
 525                 .getter = lb_bpf_func_get,
 526                 .setter = lb_bpf_func_set,
 527         },
 528         {
 529                 .name = "lb_tx_method",
 530                 .type = TEAM_OPTION_TYPE_STRING,
 531                 .getter = lb_tx_method_get,
 532                 .setter = lb_tx_method_set,
 533         },
 534         {
 535                 .name = "lb_tx_hash_to_port_mapping",
 536                 .array_size = LB_TX_HASHTABLE_SIZE,
 537                 .type = TEAM_OPTION_TYPE_U32,
 538                 .init = lb_tx_hash_to_port_mapping_init,
 539                 .getter = lb_tx_hash_to_port_mapping_get,
 540                 .setter = lb_tx_hash_to_port_mapping_set,
 541         },
 542         {
 543                 .name = "lb_hash_stats",
 544                 .array_size = LB_TX_HASHTABLE_SIZE,
 545                 .type = TEAM_OPTION_TYPE_BINARY,
 546                 .init = lb_hash_stats_init,
 547                 .getter = lb_hash_stats_get,
 548         },
 549         {
 550                 .name = "lb_port_stats",
 551                 .per_port = true,
 552                 .type = TEAM_OPTION_TYPE_BINARY,
 553                 .init = lb_port_stats_init,
 554                 .getter = lb_port_stats_get,
 555         },
 556         {
 557                 .name = "lb_stats_refresh_interval",
 558                 .type = TEAM_OPTION_TYPE_U32,
 559                 .getter = lb_stats_refresh_interval_get,
 560                 .setter = lb_stats_refresh_interval_set,
 561         },
 562 };
 563
 564 static int lb_init(struct team *team)
 565 {
 566         struct lb_priv *lb_priv = get_lb_priv(team);
 567         lb_select_tx_port_func_t *func;
 568         int err;
 569
 570         /* set default tx port selector */
 571         func = lb_select_tx_port_get_func("hash");
 572         BUG_ON(!func);
 573         rcu_assign_pointer(lb_priv->select_tx_port_func, func);
 574
 575         lb_priv->ex = kzalloc(sizeof(*lb_priv->ex), GFP_KERNEL);
 576         if (!lb_priv->ex)
 577                 return -ENOMEM;
 578         lb_priv->ex->team = team;
 579
 580         lb_priv->pcpu_stats = alloc_percpu(struct lb_pcpu_stats);
 581         if (!lb_priv->pcpu_stats) {
 582                 err = -ENOMEM;
 583                 goto err_alloc_pcpu_stats;
 584         }
 585
 586         INIT_DELAYED_WORK(&lb_priv->ex->stats.refresh_dw, lb_stats_refresh);
 587
 588         err = team_options_register(team, lb_options, ARRAY_SIZE(lb_options));
 589         if (err)
 590                 goto err_options_register;
 591         return 0;
 592
 593 err_options_register:
 594         free_percpu(lb_priv->pcpu_stats);
 595 err_alloc_pcpu_stats:
 596         kfree(lb_priv->ex);
 597         return err;
 598 }
 599
 600 static void lb_exit(struct team *team)
 601 {
 602         struct lb_priv *lb_priv = get_lb_priv(team);
 603
 604         team_options_unregister(team, lb_options,
 605                                 ARRAY_SIZE(lb_options));
 606         cancel_delayed_work_sync(&lb_priv->ex->stats.refresh_dw);
 607         free_percpu(lb_priv->pcpu_stats);
 608         kfree(lb_priv->ex);
 609 }
 610
 611 static int lb_port_enter(struct team *team, struct team_port *port)
 612 {
 613         struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
 614
 615         lb_port_priv->pcpu_stats = alloc_percpu(struct lb_stats);
 616         if (!lb_port_priv->pcpu_stats)
 617                 return -ENOMEM;
 618         return 0;
 619 }
 620
 621 static void lb_port_leave(struct team *team, struct team_port *port)
 622 {
 623         struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
 624
 625         free_percpu(lb_port_priv->pcpu_stats);
 626 }
 627
 628 static void lb_port_disabled(struct team *team, struct team_port *port)
 629 {
 630         lb_tx_hash_to_port_mapping_null_port(team, port);
 631 }
 632
 633 static const struct team_mode_ops lb_mode_ops = {
 634         .init                   = lb_init,
 635         .exit                   = lb_exit,
 636         .port_enter             = lb_port_enter,
 637         .port_leave             = lb_port_leave,
 638         .port_disabled          = lb_port_disabled,
 639         .transmit               = lb_transmit,
 640 };
 641
 642 static const struct team_mode lb_mode = {
 643         .kind           = "loadbalance",
 644         .owner          = THIS_MODULE,
 645         .priv_size      = sizeof(struct lb_priv),
 646         .port_priv_size = sizeof(struct lb_port_priv),
 647         .ops            = &lb_mode_ops,
 648 };
 649
 650 static int __init lb_init_module(void)
 651 {
 652         return team_mode_register(&lb_mode);
 653 }
 654
 655 static void __exit lb_cleanup_module(void)
 656 {
 657         team_mode_unregister(&lb_mode);
 658 }
 659
 660 module_init(lb_init_module);
 661 module_exit(lb_cleanup_module);
 662
 663 MODULE_LICENSE("GPL v2");
 664 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
 665 MODULE_DESCRIPTION("Load-balancing mode for team");
 666 MODULE_ALIAS("team-mode-loadbalance");