Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / team / team_mode_roundrobin.c

diff --git a/kernel/drivers/net/team/team_mode_roundrobin.c b/kernel/drivers/net/team/team_mode_roundrobin.c
new file mode 100644 (file)
index 0000000..5366585
--- /dev/null
+++ b/kernel/drivers/net/team/team_mode_roundrobin.c
@@ -0,0 +1,79 @@
+/*
+ * drivers/net/team/team_mode_roundrobin.c - Round-robin mode for team
+ * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
+ *
+ * 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>
+
+struct rr_priv {
+       unsigned int sent_packets;
+};
+
+static struct rr_priv *rr_priv(struct team *team)
+{
+       return (struct rr_priv *) &team->mode_priv;
+}
+
+static bool rr_transmit(struct team *team, struct sk_buff *skb)
+{
+       struct team_port *port;
+       int port_index;
+
+       port_index = team_num_to_port_index(team,
+                                           rr_priv(team)->sent_packets++);
+       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 rr_mode_ops = {
+       .transmit               = rr_transmit,
+       .port_enter             = team_modeop_port_enter,
+       .port_change_dev_addr   = team_modeop_port_change_dev_addr,
+};
+
+static const struct team_mode rr_mode = {
+       .kind           = "roundrobin",
+       .owner          = THIS_MODULE,
+       .priv_size      = sizeof(struct rr_priv),
+       .ops            = &rr_mode_ops,
+};
+
+static int __init rr_init_module(void)
+{
+       return team_mode_register(&rr_mode);
+}
+
+static void __exit rr_cleanup_module(void)
+{
+       team_mode_unregister(&rr_mode);
+}
+
+module_init(rr_init_module);
+module_exit(rr_cleanup_module);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
+MODULE_DESCRIPTION("Round-robin mode for team");
+MODULE_ALIAS("team-mode-roundrobin");