LXR linux/drivers/net/team/team_mode

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * drivers/net/team/team_mode_random.c - Random mode for team
   4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   5 */
   6
   7#include <linux/kernel.h>
   8#include <linux/types.h>
   9#include <linux/module.h>
  10#include <linux/init.h>
  11#include <linux/skbuff.h>
  12#include <linux/if_team.h>
  13
  14static bool rnd_transmit(struct team *team, struct sk_buff *skb)
  15{
  16        struct team_port *port;
  17        int port_index;
  18
  19        port_index = prandom_u32_max(team->en_port_count);
  20        port = team_get_port_by_index_rcu(team, port_index);
  21        if (unlikely(!port))
  22                goto drop;
  23        port = team_get_first_port_txable_rcu(team, port);
  24        if (unlikely(!port))
  25                goto drop;
  26        if (team_dev_queue_xmit(team, port, skb))
  27                return false;
  28        return true;
  29
  30drop:
  31        dev_kfree_skb_any(skb);
  32        return false;
  33}
  34
  35static const struct team_mode_ops rnd_mode_ops = {
  36        .transmit               = rnd_transmit,
  37        .port_enter             = team_modeop_port_enter,
  38        .port_change_dev_addr   = team_modeop_port_change_dev_addr,
  39};
  40
  41static const struct team_mode rnd_mode = {
  42        .kind           = "random",
  43        .owner          = THIS_MODULE,
  44        .ops            = &rnd_mode_ops,
  45        .lag_tx_type    = NETDEV_LAG_TX_TYPE_RANDOM,
  46};
  47
  48static int __init rnd_init_module(void)
  49{
  50        return team_mode_register(&rnd_mode);
  51}
  52
  53static void __exit rnd_cleanup_module(void)
  54{
  55        team_mode_unregister(&rnd_mode);
  56}
  57
  58module_init(rnd_init_module);
  59module_exit(rnd_cleanup_module);
  60
  61MODULE_LICENSE("GPL v2");
  62MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
  63MODULE_DESCRIPTION("Random mode for team");
  64MODULE_ALIAS_TEAM_MODE("random");
  65