tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/team/team_mode_activebackup.c - Active-backup mode for team
4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
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/errno.h>
12#include <linux/netdevice.h>
13#include <net/rtnetlink.h>
14#include <linux/if_team.h>
15
16struct ab_priv {
17 struct team_port __rcu *active_port;
18 struct team_option_inst_info *ap_opt_inst_info;
19};
20
21static struct ab_priv *ab_priv(struct team *team)
22{
23 return (struct ab_priv *) &team->mode_priv;
24}
25
26static rx_handler_result_t ab_receive(struct team *team, struct team_port *port,
27 struct sk_buff *skb) {
28 struct team_port *active_port;
29
30 active_port = rcu_dereference(ab_priv(team)->active_port);
31 if (active_port != port)
32 return RX_HANDLER_EXACT;
33 return RX_HANDLER_ANOTHER;
34}
35
36static bool ab_transmit(struct team *team, struct sk_buff *skb)
37{
38 struct team_port *active_port;
39
40 active_port = rcu_dereference_bh(ab_priv(team)->active_port);
41 if (unlikely(!active_port))
42 goto drop;
43 if (team_dev_queue_xmit(team, active_port, skb))
44 return false;
45 return true;
46
47drop:
48 dev_kfree_skb_any(skb);
49 return false;
50}
51
52static void ab_port_leave(struct team *team, struct team_port *port)
53{
54 if (ab_priv(team)->active_port == port) {
55 RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
56 team_option_inst_set_change(ab_priv(team)->ap_opt_inst_info);
57 }
58}
59
60static void ab_active_port_init(struct team *team,
61 struct team_option_inst_info *info)
62{
63 ab_priv(team)->ap_opt_inst_info = info;
64}
65
66static void ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
67{
68 struct team_port *active_port;
69
70 active_port = rtnl_dereference(ab_priv(team)->active_port);
71 if (active_port)
72 ctx->data.u32_val = active_port->dev->ifindex;
73 else
74 ctx->data.u32_val = 0;
75}
76
77static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
78{
79 struct team_port *port;
80
81 list_for_each_entry(port, &team->port_list, list) {
82 if (port->dev->ifindex == ctx->data.u32_val) {
83 rcu_assign_pointer(ab_priv(team)->active_port, port);
84 return 0;
85 }
86 }
87 return -ENOENT;
88}
89
90static const struct team_option ab_options[] = {
91 {
92 .name = "activeport",
93 .type = TEAM_OPTION_TYPE_U32,
94 .init = ab_active_port_init,
95 .getter = ab_active_port_get,
96 .setter = ab_active_port_set,
97 },
98};
99
100static int ab_init(struct team *team)
101{
102 return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
103}
104
105static void ab_exit(struct team *team)
106{
107 team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
108}
109
110static const struct team_mode_ops ab_mode_ops = {
111 .init = ab_init,
112 .exit = ab_exit,
113 .receive = ab_receive,
114 .transmit = ab_transmit,
115 .port_leave = ab_port_leave,
116};
117
118static const struct team_mode ab_mode = {
119 .kind = "activebackup",
120 .owner = THIS_MODULE,
121 .priv_size = sizeof(struct ab_priv),
122 .ops = &ab_mode_ops,
123 .lag_tx_type = NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
124};
125
126static int __init ab_init_module(void)
127{
128 return team_mode_register(&ab_mode);
129}
130
131static void __exit ab_cleanup_module(void)
132{
133 team_mode_unregister(&ab_mode);
134}
135
136module_init(ab_init_module);
137module_exit(ab_cleanup_module);
138
139MODULE_LICENSE("GPL v2");
140MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
141MODULE_DESCRIPTION("Active-backup mode for team");
142MODULE_ALIAS_TEAM_MODE("activebackup");