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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 | #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 | u32 rx_nohandler; | |
28 | }; | |
29 | ||
30 | struct team; | |
31 | ||
32 | struct team_port { | |
33 | struct net_device *dev; | |
34 | struct hlist_node hlist; /* node in enabled ports hash list */ | |
35 | struct list_head list; /* node in ordinary list */ | |
36 | struct team *team; | |
37 | int index; /* index of enabled port. If disabled, it's set to -1 */ | |
38 | ||
39 | bool linkup; /* either state.linkup or user.linkup */ | |
40 | ||
41 | struct { | |
42 | bool linkup; | |
43 | u32 speed; | |
44 | u8 duplex; | |
45 | } state; | |
46 | ||
47 | /* Values set by userspace */ | |
48 | struct { | |
49 | bool linkup; | |
50 | bool linkup_enabled; | |
51 | } user; | |
52 | ||
53 | /* Custom gennetlink interface related flags */ | |
54 | bool changed; | |
55 | bool removed; | |
56 | ||
57 | /* | |
58 | * A place for storing original values of the device before it | |
59 | * become a port. | |
60 | */ | |
61 | struct { | |
62 | unsigned char dev_addr[MAX_ADDR_LEN]; | |
63 | unsigned int mtu; | |
64 | } orig; | |
65 | ||
66 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
67 | struct netpoll *np; | |
68 | #endif | |
69 | ||
70 | s32 priority; /* lower number ~ higher priority */ | |
71 | u16 queue_id; | |
72 | struct list_head qom_list; /* node in queue override mapping list */ | |
73 | struct rcu_head rcu; | |
74 | long mode_priv[0]; | |
75 | }; | |
76 | ||
77 | static inline bool team_port_enabled(struct team_port *port) | |
78 | { | |
79 | return port->index != -1; | |
80 | } | |
81 | ||
82 | static inline bool team_port_txable(struct team_port *port) | |
83 | { | |
84 | return port->linkup && team_port_enabled(port); | |
85 | } | |
86 | ||
87 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
88 | static inline void team_netpoll_send_skb(struct team_port *port, | |
89 | struct sk_buff *skb) | |
90 | { | |
91 | struct netpoll *np = port->np; | |
92 | ||
93 | if (np) | |
94 | netpoll_send_skb(np, skb); | |
95 | } | |
96 | #else | |
97 | static inline void team_netpoll_send_skb(struct team_port *port, | |
98 | struct sk_buff *skb) | |
99 | { | |
100 | } | |
101 | #endif | |
102 | ||
103 | struct team_mode_ops { | |
104 | int (*init)(struct team *team); | |
105 | void (*exit)(struct team *team); | |
106 | rx_handler_result_t (*receive)(struct team *team, | |
107 | struct team_port *port, | |
108 | struct sk_buff *skb); | |
109 | bool (*transmit)(struct team *team, struct sk_buff *skb); | |
110 | int (*port_enter)(struct team *team, struct team_port *port); | |
111 | void (*port_leave)(struct team *team, struct team_port *port); | |
112 | void (*port_change_dev_addr)(struct team *team, struct team_port *port); | |
113 | void (*port_enabled)(struct team *team, struct team_port *port); | |
114 | void (*port_disabled)(struct team *team, struct team_port *port); | |
115 | }; | |
116 | ||
117 | extern int team_modeop_port_enter(struct team *team, struct team_port *port); | |
118 | extern void team_modeop_port_change_dev_addr(struct team *team, | |
119 | struct team_port *port); | |
120 | ||
121 | enum team_option_type { | |
122 | TEAM_OPTION_TYPE_U32, | |
123 | TEAM_OPTION_TYPE_STRING, | |
124 | TEAM_OPTION_TYPE_BINARY, | |
125 | TEAM_OPTION_TYPE_BOOL, | |
126 | TEAM_OPTION_TYPE_S32, | |
127 | }; | |
128 | ||
129 | struct team_option_inst_info { | |
130 | u32 array_index; | |
131 | struct team_port *port; /* != NULL if per-port */ | |
132 | }; | |
133 | ||
134 | struct team_gsetter_ctx { | |
135 | union { | |
136 | u32 u32_val; | |
137 | const char *str_val; | |
138 | struct { | |
139 | const void *ptr; | |
140 | u32 len; | |
141 | } bin_val; | |
142 | bool bool_val; | |
143 | s32 s32_val; | |
144 | } data; | |
145 | struct team_option_inst_info *info; | |
146 | }; | |
147 | ||
148 | struct team_option { | |
149 | struct list_head list; | |
150 | const char *name; | |
151 | bool per_port; | |
152 | unsigned int array_size; /* != 0 means the option is array */ | |
153 | enum team_option_type type; | |
154 | int (*init)(struct team *team, struct team_option_inst_info *info); | |
155 | int (*getter)(struct team *team, struct team_gsetter_ctx *ctx); | |
156 | int (*setter)(struct team *team, struct team_gsetter_ctx *ctx); | |
157 | }; | |
158 | ||
159 | extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info); | |
160 | extern void team_options_change_check(struct team *team); | |
161 | ||
162 | struct team_mode { | |
163 | const char *kind; | |
164 | struct module *owner; | |
165 | size_t priv_size; | |
166 | size_t port_priv_size; | |
167 | const struct team_mode_ops *ops; | |
168 | enum netdev_lag_tx_type lag_tx_type; | |
169 | }; | |
170 | ||
171 | #define TEAM_PORT_HASHBITS 4 | |
172 | #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS) | |
173 | ||
174 | #define TEAM_MODE_PRIV_LONGS 4 | |
175 | #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS) | |
176 | ||
177 | struct team { | |
178 | struct net_device *dev; /* associated netdevice */ | |
179 | struct team_pcpu_stats __percpu *pcpu_stats; | |
180 | ||
181 | struct mutex lock; /* used for overall locking, e.g. port lists write */ | |
182 | ||
183 | /* | |
184 | * List of enabled ports and their count | |
185 | */ | |
186 | int en_port_count; | |
187 | struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES]; | |
188 | ||
189 | struct list_head port_list; /* list of all ports */ | |
190 | ||
191 | struct list_head option_list; | |
192 | struct list_head option_inst_list; /* list of option instances */ | |
193 | ||
194 | const struct team_mode *mode; | |
195 | struct team_mode_ops ops; | |
196 | bool user_carrier_enabled; | |
197 | bool queue_override_enabled; | |
198 | struct list_head *qom_lists; /* array of queue override mapping lists */ | |
199 | bool port_mtu_change_allowed; | |
200 | struct { | |
201 | unsigned int count; | |
202 | unsigned int interval; /* in ms */ | |
203 | atomic_t count_pending; | |
204 | struct delayed_work dw; | |
205 | } notify_peers; | |
206 | struct { | |
207 | unsigned int count; | |
208 | unsigned int interval; /* in ms */ | |
209 | atomic_t count_pending; | |
210 | struct delayed_work dw; | |
211 | } mcast_rejoin; | |
212 | long mode_priv[TEAM_MODE_PRIV_LONGS]; | |
213 | }; | |
214 | ||
215 | static inline int team_dev_queue_xmit(struct team *team, struct team_port *port, | |
216 | struct sk_buff *skb) | |
217 | { | |
218 | BUILD_BUG_ON(sizeof(skb->queue_mapping) != | |
219 | sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping)); | |
220 | skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping); | |
221 | ||
222 | skb->dev = port->dev; | |
223 | if (unlikely(netpoll_tx_running(team->dev))) { | |
224 | team_netpoll_send_skb(port, skb); | |
225 | return 0; | |
226 | } | |
227 | return dev_queue_xmit(skb); | |
228 | } | |
229 | ||
230 | static inline struct hlist_head *team_port_index_hash(struct team *team, | |
231 | int port_index) | |
232 | { | |
233 | return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)]; | |
234 | } | |
235 | ||
236 | static inline struct team_port *team_get_port_by_index(struct team *team, | |
237 | int port_index) | |
238 | { | |
239 | struct team_port *port; | |
240 | struct hlist_head *head = team_port_index_hash(team, port_index); | |
241 | ||
242 | hlist_for_each_entry(port, head, hlist) | |
243 | if (port->index == port_index) | |
244 | return port; | |
245 | return NULL; | |
246 | } | |
247 | ||
248 | static inline int team_num_to_port_index(struct team *team, unsigned int num) | |
249 | { | |
250 | int en_port_count = READ_ONCE(team->en_port_count); | |
251 | ||
252 | if (unlikely(!en_port_count)) | |
253 | return 0; | |
254 | return num % en_port_count; | |
255 | } | |
256 | ||
257 | static inline struct team_port *team_get_port_by_index_rcu(struct team *team, | |
258 | int port_index) | |
259 | { | |
260 | struct team_port *port; | |
261 | struct hlist_head *head = team_port_index_hash(team, port_index); | |
262 | ||
263 | hlist_for_each_entry_rcu(port, head, hlist) | |
264 | if (port->index == port_index) | |
265 | return port; | |
266 | return NULL; | |
267 | } | |
268 | ||
269 | static inline struct team_port * | |
270 | team_get_first_port_txable_rcu(struct team *team, struct team_port *port) | |
271 | { | |
272 | struct team_port *cur; | |
273 | ||
274 | if (likely(team_port_txable(port))) | |
275 | return port; | |
276 | cur = port; | |
277 | list_for_each_entry_continue_rcu(cur, &team->port_list, list) | |
278 | if (team_port_txable(cur)) | |
279 | return cur; | |
280 | list_for_each_entry_rcu(cur, &team->port_list, list) { | |
281 | if (cur == port) | |
282 | break; | |
283 | if (team_port_txable(cur)) | |
284 | return cur; | |
285 | } | |
286 | return NULL; | |
287 | } | |
288 | ||
289 | extern int team_options_register(struct team *team, | |
290 | const struct team_option *option, | |
291 | size_t option_count); | |
292 | extern void team_options_unregister(struct team *team, | |
293 | const struct team_option *option, | |
294 | size_t option_count); | |
295 | extern int team_mode_register(const struct team_mode *mode); | |
296 | extern void team_mode_unregister(const struct team_mode *mode); | |
297 | ||
298 | #define TEAM_DEFAULT_NUM_TX_QUEUES 16 | |
299 | #define TEAM_DEFAULT_NUM_RX_QUEUES 16 | |
300 | ||
301 | #define MODULE_ALIAS_TEAM_MODE(kind) MODULE_ALIAS("team-mode-" kind) | |
302 | ||
303 | #endif /* _LINUX_IF_TEAM_H_ */ |