// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * drivers/net/team/team_mode_random.c - Random mode for team
 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/if_team.h>

static bool rnd_transmit(struct team *team, struct sk_buff *skb)
{
        struct team_port *port;
        int port_index;

        port_index = get_random_u32_below(team->en_port_count);
        port = team_get_port_by_index_rcu(team, port_index);
        if (unlikely(!port))
                goto drop;
        port = team_get_first_port_txable_rcu(team, port);
        if (unlikely(!port))
                goto drop;
        if (team_dev_queue_xmit(team, port, skb))
                return false;
        return true;

drop:
        dev_kfree_skb_any(skb);
        return false;
}

static const struct team_mode_ops rnd_mode_ops = {
        .transmit               = rnd_transmit,
        .port_enter             = team_modeop_port_enter,
        .port_change_dev_addr   = team_modeop_port_change_dev_addr,
};

static const struct team_mode rnd_mode = {
        .kind           = "random",
        .owner          = THIS_MODULE,
        .ops            = &rnd_mode_ops,
        .lag_tx_type    = NETDEV_LAG_TX_TYPE_RANDOM,
};

static int __init rnd_init_module(void)
{
        return team_mode_register(&rnd_mode);
}

static void __exit rnd_cleanup_module(void)
{
        team_mode_unregister(&rnd_mode);
}

module_init(rnd_init_module);
module_exit(rnd_cleanup_module);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
MODULE_DESCRIPTION("Random mode for team");
MODULE_ALIAS_TEAM_MODE("random");