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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/net/team/team_mode_activebackup.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/net/team/team_mode_activebackup.c')
-rw-r--r-- | kernel/drivers/net/team/team_mode_activebackup.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/kernel/drivers/net/team/team_mode_activebackup.c b/kernel/drivers/net/team/team_mode_activebackup.c new file mode 100644 index 000000000..40fd3381b --- /dev/null +++ b/kernel/drivers/net/team/team_mode_activebackup.c @@ -0,0 +1,148 @@ +/* + * 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"); |