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1/*
2 * include/linux/if_team.h - Network team device driver header
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10#ifndef _LINUX_IF_TEAM_H_
11#define _LINUX_IF_TEAM_H_
12
13
14#include <linux/netpoll.h>
15#include <net/sch_generic.h>
16#include <uapi/linux/if_team.h>
17
18struct team_pcpu_stats {
19 u64 rx_packets;
20 u64 rx_bytes;
21 u64 rx_multicast;
22 u64 tx_packets;
23 u64 tx_bytes;
24 struct u64_stats_sync syncp;
25 u32 rx_dropped;
26 u32 tx_dropped;
27};
28
29struct team;
30
31struct team_port {
32 struct net_device *dev;
33 struct hlist_node hlist; /* node in enabled ports hash list */
34 struct list_head list; /* node in ordinary list */
35 struct team *team;
36 int index; /* index of enabled port. If disabled, it's set to -1 */
37
38 bool linkup; /* either state.linkup or user.linkup */
39
40 struct {
41 bool linkup;
42 u32 speed;
43 u8 duplex;
44 } state;
45
46 /* Values set by userspace */
47 struct {
48 bool linkup;
49 bool linkup_enabled;
50 } user;
51
52 /* Custom gennetlink interface related flags */
53 bool changed;
54 bool removed;
55
56 /*
57 * A place for storing original values of the device before it
58 * become a port.
59 */
60 struct {
61 unsigned char dev_addr[MAX_ADDR_LEN];
62 unsigned int mtu;
63 } orig;
64
65#ifdef CONFIG_NET_POLL_CONTROLLER
66 struct netpoll *np;
67#endif
68
69 s32 priority; /* lower number ~ higher priority */
70 u16 queue_id;
71 struct list_head qom_list; /* node in queue override mapping list */
72 long mode_priv[0];
73};
74
75static inline bool team_port_enabled(struct team_port *port)
76{
77 return port->index != -1;
78}
79
80static inline bool team_port_txable(struct team_port *port)
81{
82 return port->linkup && team_port_enabled(port);
83}
84
85#ifdef CONFIG_NET_POLL_CONTROLLER
86static inline void team_netpoll_send_skb(struct team_port *port,
87 struct sk_buff *skb)
88{
89 struct netpoll *np = port->np;
90
91 if (np)
92 netpoll_send_skb(np, skb);
93}
94#else
95static inline void team_netpoll_send_skb(struct team_port *port,
96 struct sk_buff *skb)
97{
98}
99#endif
100
101struct team_mode_ops {
102 int (*init)(struct team *team);
103 void (*exit)(struct team *team);
104 rx_handler_result_t (*receive)(struct team *team,
105 struct team_port *port,
106 struct sk_buff *skb);
107 bool (*transmit)(struct team *team, struct sk_buff *skb);
108 int (*port_enter)(struct team *team, struct team_port *port);
109 void (*port_leave)(struct team *team, struct team_port *port);
110 void (*port_change_dev_addr)(struct team *team, struct team_port *port);
111 void (*port_enabled)(struct team *team, struct team_port *port);
112 void (*port_disabled)(struct team *team, struct team_port *port);
113};
114
115extern int team_modeop_port_enter(struct team *team, struct team_port *port);
116extern void team_modeop_port_change_dev_addr(struct team *team,
117 struct team_port *port);
118
119enum team_option_type {
120 TEAM_OPTION_TYPE_U32,
121 TEAM_OPTION_TYPE_STRING,
122 TEAM_OPTION_TYPE_BINARY,
123 TEAM_OPTION_TYPE_BOOL,
124 TEAM_OPTION_TYPE_S32,
125};
126
127struct team_option_inst_info {
128 u32 array_index;
129 struct team_port *port; /* != NULL if per-port */
130};
131
132struct team_gsetter_ctx {
133 union {
134 u32 u32_val;
135 const char *str_val;
136 struct {
137 const void *ptr;
138 u32 len;
139 } bin_val;
140 bool bool_val;
141 s32 s32_val;
142 } data;
143 struct team_option_inst_info *info;
144};
145
146struct team_option {
147 struct list_head list;
148 const char *name;
149 bool per_port;
150 unsigned int array_size; /* != 0 means the option is array */
151 enum team_option_type type;
152 int (*init)(struct team *team, struct team_option_inst_info *info);
153 int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
154 int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
155};
156
157extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
158extern void team_options_change_check(struct team *team);
159
160struct team_mode {
161 const char *kind;
162 struct module *owner;
163 size_t priv_size;
164 size_t port_priv_size;
165 const struct team_mode_ops *ops;
166};
167
168#define TEAM_PORT_HASHBITS 4
169#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
170
171#define TEAM_MODE_PRIV_LONGS 4
172#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
173
174struct team {
175 struct net_device *dev; /* associated netdevice */
176 struct team_pcpu_stats __percpu *pcpu_stats;
177
178 struct mutex lock; /* used for overall locking, e.g. port lists write */
179
180 /*
181 * List of enabled ports and their count
182 */
183 int en_port_count;
184 struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
185
186 struct list_head port_list; /* list of all ports */
187
188 struct list_head option_list;
189 struct list_head option_inst_list; /* list of option instances */
190
191 const struct team_mode *mode;
192 struct team_mode_ops ops;
193 bool user_carrier_enabled;
194 bool queue_override_enabled;
195 struct list_head *qom_lists; /* array of queue override mapping lists */
196 long mode_priv[TEAM_MODE_PRIV_LONGS];
197};
198
199static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
200 struct sk_buff *skb)
201{
202 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
203 sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
204 skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
205
206 skb->dev = port->dev;
207 if (unlikely(netpoll_tx_running(team->dev))) {
208 team_netpoll_send_skb(port, skb);
209 return 0;
210 }
211 return dev_queue_xmit(skb);
212}
213
214static inline struct hlist_head *team_port_index_hash(struct team *team,
215 int port_index)
216{
217 return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
218}
219
220static inline struct team_port *team_get_port_by_index(struct team *team,
221 int port_index)
222{
223 struct team_port *port;
224 struct hlist_head *head = team_port_index_hash(team, port_index);
225
226 hlist_for_each_entry(port, head, hlist)
227 if (port->index == port_index)
228 return port;
229 return NULL;
230}
231static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
232 int port_index)
233{
234 struct team_port *port;
235 struct hlist_head *head = team_port_index_hash(team, port_index);
236
237 hlist_for_each_entry_rcu(port, head, hlist)
238 if (port->index == port_index)
239 return port;
240 return NULL;
241}
242
243static inline struct team_port *
244team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
245{
246 struct team_port *cur;
247
248 if (likely(team_port_txable(port)))
249 return port;
250 cur = port;
251 list_for_each_entry_continue_rcu(cur, &team->port_list, list)
252 if (team_port_txable(cur))
253 return cur;
254 list_for_each_entry_rcu(cur, &team->port_list, list) {
255 if (cur == port)
256 break;
257 if (team_port_txable(cur))
258 return cur;
259 }
260 return NULL;
261}
262
263extern int team_options_register(struct team *team,
264 const struct team_option *option,
265 size_t option_count);
266extern void team_options_unregister(struct team *team,
267 const struct team_option *option,
268 size_t option_count);
269extern int team_mode_register(const struct team_mode *mode);
270extern void team_mode_unregister(const struct team_mode *mode);
271
272#define TEAM_DEFAULT_NUM_TX_QUEUES 16
273#define TEAM_DEFAULT_NUM_RX_QUEUES 16
274
275#endif /* _LINUX_IF_TEAM_H_ */