team_mode_broadcast.c

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/*
 * drivers/net/team/team_mode_broadcast.c - Broadcast mode for team
 * Copyright (c) 2012 Jiri Pirko <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

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

static bool bc_transmit(struct team *team, struct sk_buff *skb)
{
    struct team_port *cur;
    struct team_port *last = NULL;
    struct sk_buff *skb2;
    bool ret;
    bool sum_ret = false;

    list_for_each_entry_rcu(cur, &team->port_list, list) {
        if (team_port_txable(cur)) {
            if (last) {
                skb2 = skb_clone(skb, GFP_ATOMIC);
                if (skb2) {
                    ret = !team_dev_queue_xmit(team, last,
                                   skb2);
                    if (!sum_ret)
                        sum_ret = ret;
                }
            }
            last = cur;
        }
    }
    if (last) {
        ret = !team_dev_queue_xmit(team, last, skb);
        if (!sum_ret)
            sum_ret = ret;
    }
    return sum_ret;
}

static int bc_port_enter(struct team *team, struct team_port *port)
{
    return team_port_set_team_dev_addr(port);
}

static void bc_port_change_dev_addr(struct team *team, struct team_port *port)
{
    team_port_set_team_dev_addr(port);
}

static const struct team_mode_ops bc_mode_ops = {
    .transmit       = bc_transmit,
    .port_enter     = bc_port_enter,
    .port_change_dev_addr   = bc_port_change_dev_addr,
};

static const struct team_mode bc_mode = {
    .kind       = "broadcast",
    .owner      = THIS_MODULE,
    .ops        = &bc_mode_ops,
};

static int __init bc_init_module(void)
{
    return team_mode_register(&bc_mode);
}

static void __exit bc_cleanup_module(void)
{
    team_mode_unregister(&bc_mode);
}

module_init(bc_init_module);
module_exit(bc_cleanup_module);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jiri Pirko <[email protected]>");
MODULE_DESCRIPTION("Broadcast mode for team");
MODULE_ALIAS("team-mode-broadcast");