drivers/net/team/team_mode_roundrobin.c

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