mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-29 14:05:19 +08:00
cade455596
Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
|
|
* net/drivers/team/team_mode_activebackup.c - Active-backup 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 <net/rtnetlink.h>
|
|
#include <linux/if_team.h>
|
|
|
|
struct ab_priv {
|
|
struct team_port __rcu *active_port;
|
|
};
|
|
|
|
static struct ab_priv *ab_priv(struct team *team)
|
|
{
|
|
return (struct ab_priv *) &team->mode_priv;
|
|
}
|
|
|
|
static rx_handler_result_t ab_receive(struct team *team, struct team_port *port,
|
|
struct sk_buff *skb) {
|
|
struct team_port *active_port;
|
|
|
|
active_port = rcu_dereference(ab_priv(team)->active_port);
|
|
if (active_port != port)
|
|
return RX_HANDLER_EXACT;
|
|
return RX_HANDLER_ANOTHER;
|
|
}
|
|
|
|
static bool ab_transmit(struct team *team, struct sk_buff *skb)
|
|
{
|
|
struct team_port *active_port;
|
|
|
|
active_port = rcu_dereference(ab_priv(team)->active_port);
|
|
if (unlikely(!active_port))
|
|
goto drop;
|
|
skb->dev = active_port->dev;
|
|
if (dev_queue_xmit(skb))
|
|
return false;
|
|
return true;
|
|
|
|
drop:
|
|
dev_kfree_skb_any(skb);
|
|
return false;
|
|
}
|
|
|
|
static void ab_port_leave(struct team *team, struct team_port *port)
|
|
{
|
|
if (ab_priv(team)->active_port == port)
|
|
RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
|
|
}
|
|
|
|
static int ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
|
|
{
|
|
if (ab_priv(team)->active_port)
|
|
ctx->data.u32_val = ab_priv(team)->active_port->dev->ifindex;
|
|
else
|
|
ctx->data.u32_val = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
|
|
{
|
|
struct team_port *port;
|
|
|
|
list_for_each_entry(port, &team->port_list, list) {
|
|
if (port->dev->ifindex == ctx->data.u32_val) {
|
|
rcu_assign_pointer(ab_priv(team)->active_port, port);
|
|
return 0;
|
|
}
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
|
|
static const struct team_option ab_options[] = {
|
|
{
|
|
.name = "activeport",
|
|
.type = TEAM_OPTION_TYPE_U32,
|
|
.getter = ab_active_port_get,
|
|
.setter = ab_active_port_set,
|
|
},
|
|
};
|
|
|
|
static int ab_init(struct team *team)
|
|
{
|
|
return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
|
|
}
|
|
|
|
static void ab_exit(struct team *team)
|
|
{
|
|
team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
|
|
}
|
|
|
|
static const struct team_mode_ops ab_mode_ops = {
|
|
.init = ab_init,
|
|
.exit = ab_exit,
|
|
.receive = ab_receive,
|
|
.transmit = ab_transmit,
|
|
.port_leave = ab_port_leave,
|
|
};
|
|
|
|
static struct team_mode ab_mode = {
|
|
.kind = "activebackup",
|
|
.owner = THIS_MODULE,
|
|
.priv_size = sizeof(struct ab_priv),
|
|
.ops = &ab_mode_ops,
|
|
};
|
|
|
|
static int __init ab_init_module(void)
|
|
{
|
|
return team_mode_register(&ab_mode);
|
|
}
|
|
|
|
static void __exit ab_cleanup_module(void)
|
|
{
|
|
team_mode_unregister(&ab_mode);
|
|
}
|
|
|
|
module_init(ab_init_module);
|
|
module_exit(ab_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
|
|
MODULE_DESCRIPTION("Active-backup mode for team");
|
|
MODULE_ALIAS("team-mode-activebackup");
|