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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 | |
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 | |
76 | static inline bool team_port_enabled(struct team_port *port) |
77 | { |
78 | return port->index != -1; |
79 | } |
80 | |
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 |
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 |
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 | long mode_priv[TEAM_MODE_PRIV_LONGS]; |
198 | }; |
199 | |
200 | static 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 | |
215 | static 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 | |
221 | static 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 | |
233 | static 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 | |
242 | static 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 | |
254 | static inline struct team_port * |
255 | team_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 | |
274 | extern int team_options_register(struct team *team, |
275 | const struct team_option *option, |
276 | size_t option_count); |
277 | extern void team_options_unregister(struct team *team, |
278 | const struct team_option *option, |
279 | size_t option_count); |
280 | extern int team_mode_register(const struct team_mode *mode); |
281 | extern 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_ */ |
287 |
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