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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 struct rcu_head rcu;
73 long mode_priv[0];
74};
75
76static inline bool team_port_enabled(struct team_port *port)
77{
78 return port->index != -1;
79}
80
81static inline bool team_port_txable(struct team_port *port)
82{
83 return port->linkup && team_port_enabled(port);
84}
85
86#ifdef CONFIG_NET_POLL_CONTROLLER
87static inline void team_netpoll_send_skb(struct team_port *port,
88 struct sk_buff *skb)
89{
90 struct netpoll *np = port->np;
91
92 if (np)
93 netpoll_send_skb(np, skb);
94}
95#else
96static inline void team_netpoll_send_skb(struct team_port *port,
97 struct sk_buff *skb)
98{
99}
100#endif
101
102struct team_mode_ops {
103 int (*init)(struct team *team);
104 void (*exit)(struct team *team);
105 rx_handler_result_t (*receive)(struct team *team,
106 struct team_port *port,
107 struct sk_buff *skb);
108 bool (*transmit)(struct team *team, struct sk_buff *skb);
109 int (*port_enter)(struct team *team, struct team_port *port);
110 void (*port_leave)(struct team *team, struct team_port *port);
111 void (*port_change_dev_addr)(struct team *team, struct team_port *port);
112 void (*port_enabled)(struct team *team, struct team_port *port);
113 void (*port_disabled)(struct team *team, struct team_port *port);
114};
115
116extern int team_modeop_port_enter(struct team *team, struct team_port *port);
117extern void team_modeop_port_change_dev_addr(struct team *team,
118 struct team_port *port);
119
120enum team_option_type {
121 TEAM_OPTION_TYPE_U32,
122 TEAM_OPTION_TYPE_STRING,
123 TEAM_OPTION_TYPE_BINARY,
124 TEAM_OPTION_TYPE_BOOL,
125 TEAM_OPTION_TYPE_S32,
126};
127
128struct team_option_inst_info {
129 u32 array_index;
130 struct team_port *port; /* != NULL if per-port */
131};
132
133struct team_gsetter_ctx {
134 union {
135 u32 u32_val;
136 const char *str_val;
137 struct {
138 const void *ptr;
139 u32 len;
140 } bin_val;
141 bool bool_val;
142 s32 s32_val;
143 } data;
144 struct team_option_inst_info *info;
145};
146
147struct team_option {
148 struct list_head list;
149 const char *name;
150 bool per_port;
151 unsigned int array_size; /* != 0 means the option is array */
152 enum team_option_type type;
153 int (*init)(struct team *team, struct team_option_inst_info *info);
154 int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
155 int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
156};
157
158extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
159extern void team_options_change_check(struct team *team);
160
161struct team_mode {
162 const char *kind;
163 struct module *owner;
164 size_t priv_size;
165 size_t port_priv_size;
166 const struct team_mode_ops *ops;
167};
168
169#define TEAM_PORT_HASHBITS 4
170#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
171
172#define TEAM_MODE_PRIV_LONGS 4
173#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
174
175struct team {
176 struct net_device *dev; /* associated netdevice */
177 struct team_pcpu_stats __percpu *pcpu_stats;
178
179 struct mutex lock; /* used for overall locking, e.g. port lists write */
180
181 /*
182 * List of enabled ports and their count
183 */
184 int en_port_count;
185 struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
186
187 struct list_head port_list; /* list of all ports */
188
189 struct list_head option_list;
190 struct list_head option_inst_list; /* list of option instances */
191
192 const struct team_mode *mode;
193 struct team_mode_ops ops;
194 bool user_carrier_enabled;
195 bool queue_override_enabled;
196 struct list_head *qom_lists; /* array of queue override mapping lists */
197 long mode_priv[TEAM_MODE_PRIV_LONGS];
198};
199
200static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
201 struct sk_buff *skb)
202{
203 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
204 sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
205 skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
206
207 skb->dev = port->dev;
208 if (unlikely(netpoll_tx_running(team->dev))) {
209 team_netpoll_send_skb(port, skb);
210 return 0;
211 }
212 return dev_queue_xmit(skb);
213}
214
215static inline struct hlist_head *team_port_index_hash(struct team *team,
216 int port_index)
217{
218 return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
219}
220
221static inline struct team_port *team_get_port_by_index(struct team *team,
222 int port_index)
223{
224 struct team_port *port;
225 struct hlist_head *head = team_port_index_hash(team, port_index);
226
227 hlist_for_each_entry(port, head, hlist)
228 if (port->index == port_index)
229 return port;
230 return NULL;
231}
232
233static inline int team_num_to_port_index(struct team *team, int num)
234{
235 int en_port_count = ACCESS_ONCE(team->en_port_count);
236
237 if (unlikely(!en_port_count))
238 return 0;
239 return num % en_port_count;
240}
241
242static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
243 int port_index)
244{
245 struct team_port *port;
246 struct hlist_head *head = team_port_index_hash(team, port_index);
247
248 hlist_for_each_entry_rcu(port, head, hlist)
249 if (port->index == port_index)
250 return port;
251 return NULL;
252}
253
254static inline struct team_port *
255team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
256{
257 struct team_port *cur;
258
259 if (likely(team_port_txable(port)))
260 return port;
261 cur = port;
262 list_for_each_entry_continue_rcu(cur, &team->port_list, list)
263 if (team_port_txable(cur))
264 return cur;
265 list_for_each_entry_rcu(cur, &team->port_list, list) {
266 if (cur == port)
267 break;
268 if (team_port_txable(cur))
269 return cur;
270 }
271 return NULL;
272}
273
274extern int team_options_register(struct team *team,
275 const struct team_option *option,
276 size_t option_count);
277extern void team_options_unregister(struct team *team,
278 const struct team_option *option,
279 size_t option_count);
280extern int team_mode_register(const struct team_mode *mode);
281extern void team_mode_unregister(const struct team_mode *mode);
282
283#define TEAM_DEFAULT_NUM_TX_QUEUES 16
284#define TEAM_DEFAULT_NUM_RX_QUEUES 16
285
286#endif /* _LINUX_IF_TEAM_H_ */