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linux-next/drivers/net/team/team_mode_activebackup.c
Jiri Pirko 675b8044e1 team: ab: set active port option as changed when port is leaving
In case port is leaving the team, set the option "activeport" as changed
so the change can be properly propagated to userspace

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-04 14:55:45 -05:00

149 lines
3.5 KiB
C

/*
* drivers/net/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;
struct team_option_inst_info *ap_opt_inst_info;
};
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_bh(ab_priv(team)->active_port);
if (unlikely(!active_port))
goto drop;
if (team_dev_queue_xmit(team, active_port, 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);
team_option_inst_set_change(ab_priv(team)->ap_opt_inst_info);
}
}
static int ab_active_port_init(struct team *team,
struct team_option_inst_info *info)
{
ab_priv(team)->ap_opt_inst_info = info;
return 0;
}
static int ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
{
struct team_port *active_port;
active_port = rcu_dereference_protected(ab_priv(team)->active_port,
lockdep_is_held(&team->lock));
if (active_port)
ctx->data.u32_val = 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,
.init = ab_active_port_init,
.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 const 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");