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 #include <linux/netpoll.h>
14 #include <net/sch_generic.h>
15 #include <linux/types.h>
16 #include <uapi/linux/if_team.h>
17
18 struct 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
29 struct team;
30
31 struct 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
team_port_enabled(struct team_port * port)76 static inline bool team_port_enabled(struct team_port *port)
77 {
78 return port->index != -1;
79 }
80
team_port_txable(struct team_port * port)81 static 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
team_netpoll_send_skb(struct team_port * port,struct sk_buff * skb)87 static 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
team_netpoll_send_skb(struct team_port * port,struct sk_buff * skb)96 static inline void team_netpoll_send_skb(struct team_port *port,
97 struct sk_buff *skb)
98 {
99 }
100 #endif
101
102 struct 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
116 extern int team_modeop_port_enter(struct team *team, struct team_port *port);
117 extern void team_modeop_port_change_dev_addr(struct team *team,
118 struct team_port *port);
119
120 enum 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
128 struct team_option_inst_info {
129 u32 array_index;
130 struct team_port *port; /* != NULL if per-port */
131 };
132
133 struct 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
147 struct 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
158 extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
159 extern void team_options_change_check(struct team *team);
160
161 struct 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
175 struct 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 bool port_mtu_change_allowed;
198 struct {
199 unsigned int count;
200 unsigned int interval; /* in ms */
201 atomic_t count_pending;
202 struct delayed_work dw;
203 } notify_peers;
204 struct {
205 unsigned int count;
206 unsigned int interval; /* in ms */
207 atomic_t count_pending;
208 struct delayed_work dw;
209 } mcast_rejoin;
210 long mode_priv[TEAM_MODE_PRIV_LONGS];
211 };
212
team_dev_queue_xmit(struct team * team,struct team_port * port,struct sk_buff * skb)213 static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
214 struct sk_buff *skb)
215 {
216 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
217 sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
218 skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
219
220 skb->dev = port->dev;
221 if (unlikely(netpoll_tx_running(team->dev))) {
222 team_netpoll_send_skb(port, skb);
223 return 0;
224 }
225 return dev_queue_xmit(skb);
226 }
227
team_port_index_hash(struct team * team,int port_index)228 static inline struct hlist_head *team_port_index_hash(struct team *team,
229 int port_index)
230 {
231 return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
232 }
233
team_get_port_by_index(struct team * team,int port_index)234 static inline struct team_port *team_get_port_by_index(struct team *team,
235 int port_index)
236 {
237 struct team_port *port;
238 struct hlist_head *head = team_port_index_hash(team, port_index);
239
240 hlist_for_each_entry(port, head, hlist)
241 if (port->index == port_index)
242 return port;
243 return NULL;
244 }
245
team_num_to_port_index(struct team * team,int num)246 static inline int team_num_to_port_index(struct team *team, int num)
247 {
248 int en_port_count = ACCESS_ONCE(team->en_port_count);
249
250 if (unlikely(!en_port_count))
251 return 0;
252 return num % en_port_count;
253 }
254
team_get_port_by_index_rcu(struct team * team,int port_index)255 static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
256 int port_index)
257 {
258 struct team_port *port;
259 struct hlist_head *head = team_port_index_hash(team, port_index);
260
261 hlist_for_each_entry_rcu(port, head, hlist)
262 if (port->index == port_index)
263 return port;
264 return NULL;
265 }
266
267 static inline struct team_port *
team_get_first_port_txable_rcu(struct team * team,struct team_port * port)268 team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
269 {
270 struct team_port *cur;
271
272 if (likely(team_port_txable(port)))
273 return port;
274 cur = port;
275 list_for_each_entry_continue_rcu(cur, &team->port_list, list)
276 if (team_port_txable(cur))
277 return cur;
278 list_for_each_entry_rcu(cur, &team->port_list, list) {
279 if (cur == port)
280 break;
281 if (team_port_txable(cur))
282 return cur;
283 }
284 return NULL;
285 }
286
287 extern int team_options_register(struct team *team,
288 const struct team_option *option,
289 size_t option_count);
290 extern void team_options_unregister(struct team *team,
291 const struct team_option *option,
292 size_t option_count);
293 extern int team_mode_register(const struct team_mode *mode);
294 extern void team_mode_unregister(const struct team_mode *mode);
295
296 #define TEAM_DEFAULT_NUM_TX_QUEUES 16
297 #define TEAM_DEFAULT_NUM_RX_QUEUES 16
298
299 #endif /* _LINUX_IF_TEAM_H_ */
300