LXR linux/drivers/net/team/team_mode

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * drivers/net/team/team_mode_roundrobin.c - Round-robin mode for team
   4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   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/errno.h>
  12#include <linux/netdevice.h>
  13#include <linux/if_team.h>
  14
  15struct rr_priv {
  16        unsigned int sent_packets;
  17};
  18
  19static struct rr_priv *rr_priv(struct team *team)
  20{
  21        return (struct rr_priv *) &team->mode_priv;
  22}
  23
  24static bool rr_transmit(struct team *team, struct sk_buff *skb)
  25{
  26        struct team_port *port;
  27        int port_index;
  28
  29        port_index = team_num_to_port_index(team,
  30                                            rr_priv(team)->sent_packets++);
  31        port = team_get_port_by_index_rcu(team, port_index);
  32        if (unlikely(!port))
  33                goto drop;
  34        port = team_get_first_port_txable_rcu(team, port);
  35        if (unlikely(!port))
  36                goto drop;
  37        if (team_dev_queue_xmit(team, port, skb))
  38                return false;
  39        return true;
  40
  41drop:
  42        dev_kfree_skb_any(skb);
  43        return false;
  44}
  45
  46static const struct team_mode_ops rr_mode_ops = {
  47        .transmit               = rr_transmit,
  48        .port_enter             = team_modeop_port_enter,
  49        .port_change_dev_addr   = team_modeop_port_change_dev_addr,
  50};
  51
  52static const struct team_mode rr_mode = {
  53        .kind           = "roundrobin",
  54        .owner          = THIS_MODULE,
  55        .priv_size      = sizeof(struct rr_priv),
  56        .ops            = &rr_mode_ops,
  57        .lag_tx_type    = NETDEV_LAG_TX_TYPE_ROUNDROBIN,
  58};
  59
  60static int __init rr_init_module(void)
  61{
  62        return team_mode_register(&rr_mode);
  63}
  64
  65static void __exit rr_cleanup_module(void)
  66{
  67        team_mode_unregister(&rr_mode);
  68}
  69
  70module_init(rr_init_module);
  71module_exit(rr_cleanup_module);
  72
  73MODULE_LICENSE("GPL v2");
  74MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
  75MODULE_DESCRIPTION("Round-robin mode for team");
  76MODULE_ALIAS_TEAM_MODE("roundrobin");
  77