1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 */
5
6 #ifndef _NET_BOND_3AD_H
7 #define _NET_BOND_3AD_H
8
9 #include <asm/byteorder.h>
10 #include <linux/skbuff.h>
11 #include <linux/netdevice.h>
12 #include <linux/if_ether.h>
13
14 /* General definitions */
15 #define PKT_TYPE_LACPDU cpu_to_be16(ETH_P_SLOW)
16 #define AD_TIMER_INTERVAL 100 /*msec*/
17
18 #define AD_LACP_SLOW 0
19 #define AD_LACP_FAST 1
20
21 typedef struct mac_addr {
22 u8 mac_addr_value[ETH_ALEN];
23 } __packed mac_addr_t;
24
25 enum {
26 BOND_AD_STABLE = 0,
27 BOND_AD_BANDWIDTH = 1,
28 BOND_AD_COUNT = 2,
29 };
30
31 /* rx machine states(43.4.11 in the 802.3ad standard) */
32 typedef enum {
33 AD_RX_DUMMY,
34 AD_RX_INITIALIZE, /* rx Machine */
35 AD_RX_PORT_DISABLED, /* rx Machine */
36 AD_RX_LACP_DISABLED, /* rx Machine */
37 AD_RX_EXPIRED, /* rx Machine */
38 AD_RX_DEFAULTED, /* rx Machine */
39 AD_RX_CURRENT /* rx Machine */
40 } rx_states_t;
41
42 /* periodic machine states(43.4.12 in the 802.3ad standard) */
43 typedef enum {
44 AD_PERIODIC_DUMMY,
45 AD_NO_PERIODIC, /* periodic machine */
46 AD_FAST_PERIODIC, /* periodic machine */
47 AD_SLOW_PERIODIC, /* periodic machine */
48 AD_PERIODIC_TX /* periodic machine */
49 } periodic_states_t;
50
51 /* mux machine states(43.4.13 in the 802.3ad standard) */
52 typedef enum {
53 AD_MUX_DUMMY,
54 AD_MUX_DETACHED, /* mux machine */
55 AD_MUX_WAITING, /* mux machine */
56 AD_MUX_ATTACHED, /* mux machine */
57 AD_MUX_COLLECTING, /* mux machine */
58 AD_MUX_DISTRIBUTING, /* mux machine */
59 AD_MUX_COLLECTING_DISTRIBUTING /* mux machine */
60 } mux_states_t;
61
62 /* tx machine states(43.4.15 in the 802.3ad standard) */
63 typedef enum {
64 AD_TX_DUMMY,
65 AD_TRANSMIT /* tx Machine */
66 } tx_states_t;
67
68 /* churn machine states(43.4.17 in the 802.3ad standard) */
69 typedef enum {
70 AD_CHURN_MONITOR, /* monitoring for churn */
71 AD_CHURN, /* churn detected (error) */
72 AD_NO_CHURN /* no churn (no error) */
73 } churn_state_t;
74
75 /* rx indication types */
76 typedef enum {
77 AD_TYPE_LACPDU = 1, /* type lacpdu */
78 AD_TYPE_MARKER /* type marker */
79 } pdu_type_t;
80
81 /* rx marker indication types */
82 typedef enum {
83 AD_MARKER_INFORMATION_SUBTYPE = 1, /* marker imformation subtype */
84 AD_MARKER_RESPONSE_SUBTYPE /* marker response subtype */
85 } bond_marker_subtype_t;
86
87 /* timers types(43.4.9 in the 802.3ad standard) */
88 typedef enum {
89 AD_CURRENT_WHILE_TIMER,
90 AD_ACTOR_CHURN_TIMER,
91 AD_PERIODIC_TIMER,
92 AD_PARTNER_CHURN_TIMER,
93 AD_WAIT_WHILE_TIMER
94 } ad_timers_t;
95
96 #pragma pack(1)
97
98 /* Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard) */
99 typedef struct lacpdu {
100 u8 subtype; /* = LACP(= 0x01) */
101 u8 version_number;
102 u8 tlv_type_actor_info; /* = actor information(type/length/value) */
103 u8 actor_information_length; /* = 20 */
104 __be16 actor_system_priority;
105 struct mac_addr actor_system;
106 __be16 actor_key;
107 __be16 actor_port_priority;
108 __be16 actor_port;
109 u8 actor_state;
110 u8 reserved_3_1[3]; /* = 0 */
111 u8 tlv_type_partner_info; /* = partner information */
112 u8 partner_information_length; /* = 20 */
113 __be16 partner_system_priority;
114 struct mac_addr partner_system;
115 __be16 partner_key;
116 __be16 partner_port_priority;
117 __be16 partner_port;
118 u8 partner_state;
119 u8 reserved_3_2[3]; /* = 0 */
120 u8 tlv_type_collector_info; /* = collector information */
121 u8 collector_information_length;/* = 16 */
122 __be16 collector_max_delay;
123 u8 reserved_12[12];
124 u8 tlv_type_terminator; /* = terminator */
125 u8 terminator_length; /* = 0 */
126 u8 reserved_50[50]; /* = 0 */
127 } __packed lacpdu_t;
128
129 typedef struct lacpdu_header {
130 struct ethhdr hdr;
131 struct lacpdu lacpdu;
132 } __packed lacpdu_header_t;
133
134 /* Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard) */
135 typedef struct bond_marker {
136 u8 subtype; /* = 0x02 (marker PDU) */
137 u8 version_number; /* = 0x01 */
138 u8 tlv_type; /* = 0x01 (marker information) */
139 /* = 0x02 (marker response information) */
140 u8 marker_length; /* = 0x16 */
141 u16 requester_port; /* The number assigned to the port by the requester */
142 struct mac_addr requester_system; /* The requester's system id */
143 u32 requester_transaction_id; /* The transaction id allocated by the requester, */
144 u16 pad; /* = 0 */
145 u8 tlv_type_terminator; /* = 0x00 */
146 u8 terminator_length; /* = 0x00 */
147 u8 reserved_90[90]; /* = 0 */
148 } __packed bond_marker_t;
149
150 typedef struct bond_marker_header {
151 struct ethhdr hdr;
152 struct bond_marker marker;
153 } __packed bond_marker_header_t;
154
155 #pragma pack()
156
157 struct slave;
158 struct bonding;
159 struct ad_info;
160 struct port;
161
162 #ifdef __ia64__
163 #pragma pack(8)
164 #endif
165
166 struct bond_3ad_stats {
167 atomic64_t lacpdu_rx;
168 atomic64_t lacpdu_tx;
169 atomic64_t lacpdu_unknown_rx;
170 atomic64_t lacpdu_illegal_rx;
171
172 atomic64_t marker_rx;
173 atomic64_t marker_tx;
174 atomic64_t marker_resp_rx;
175 atomic64_t marker_resp_tx;
176 atomic64_t marker_unknown_rx;
177 };
178
179 /* aggregator structure(43.4.5 in the 802.3ad standard) */
180 typedef struct aggregator {
181 struct mac_addr aggregator_mac_address;
182 u16 aggregator_identifier;
183 bool is_individual;
184 u16 actor_admin_aggregator_key;
185 u16 actor_oper_aggregator_key;
186 struct mac_addr partner_system;
187 u16 partner_system_priority;
188 u16 partner_oper_aggregator_key;
189 u16 receive_state; /* BOOLEAN */
190 u16 transmit_state; /* BOOLEAN */
191 struct port *lag_ports;
192 /* ****** PRIVATE PARAMETERS ****** */
193 struct slave *slave; /* pointer to the bond slave that this aggregator belongs to */
194 u16 is_active; /* BOOLEAN. Indicates if this aggregator is active */
195 u16 num_of_ports;
196 } aggregator_t;
197
198 struct port_params {
199 struct mac_addr system;
200 u16 system_priority;
201 u16 key;
202 u16 port_number;
203 u16 port_priority;
204 u16 port_state;
205 };
206
207 /* port structure(43.4.6 in the 802.3ad standard) */
208 typedef struct port {
209 u16 actor_port_number;
210 u16 actor_port_priority;
211 struct mac_addr actor_system; /* This parameter is added here although it is not specified in the standard, just for simplification */
212 u16 actor_system_priority; /* This parameter is added here although it is not specified in the standard, just for simplification */
213 u16 actor_port_aggregator_identifier;
214 bool ntt;
215 u16 actor_admin_port_key;
216 u16 actor_oper_port_key;
217 u8 actor_admin_port_state;
218 u8 actor_oper_port_state;
219
220 struct port_params partner_admin;
221 struct port_params partner_oper;
222
223 bool is_enabled;
224
225 /* ****** PRIVATE PARAMETERS ****** */
226 u16 sm_vars; /* all state machines variables for this port */
227 rx_states_t sm_rx_state; /* state machine rx state */
228 u16 sm_rx_timer_counter; /* state machine rx timer counter */
229 periodic_states_t sm_periodic_state; /* state machine periodic state */
230 u16 sm_periodic_timer_counter; /* state machine periodic timer counter */
231 mux_states_t sm_mux_state; /* state machine mux state */
232 u16 sm_mux_timer_counter; /* state machine mux timer counter */
233 tx_states_t sm_tx_state; /* state machine tx state */
234 u16 sm_tx_timer_counter; /* state machine tx timer counter
235 * (always on - enter to transmit
236 * state 3 time per second)
237 */
238 u16 sm_churn_actor_timer_counter;
239 u16 sm_churn_partner_timer_counter;
240 u32 churn_actor_count;
241 u32 churn_partner_count;
242 churn_state_t sm_churn_actor_state;
243 churn_state_t sm_churn_partner_state;
244 struct slave *slave; /* pointer to the bond slave that this port belongs to */
245 struct aggregator *aggregator; /* pointer to an aggregator that this port related to */
246 struct port *next_port_in_aggregator; /* Next port on the linked list of the parent aggregator */
247 u32 transaction_id; /* continuous number for identification of Marker PDU's; */
248 struct lacpdu lacpdu; /* the lacpdu that will be sent for this port */
249 } port_t;
250
251 /* system structure */
252 struct ad_system {
253 u16 sys_priority;
254 struct mac_addr sys_mac_addr;
255 };
256
257 #ifdef __ia64__
258 #pragma pack()
259 #endif
260
261 /* ========== AD Exported structures to the main bonding code ========== */
262 #define BOND_AD_INFO(bond) ((bond)->ad_info)
263 #define SLAVE_AD_INFO(slave) ((slave)->ad_info)
264
265 struct ad_bond_info {
266 struct ad_system system; /* 802.3ad system structure */
267 struct bond_3ad_stats stats;
268 atomic_t agg_select_timer; /* Timer to select aggregator after all adapter's hand shakes */
269 u16 aggregator_identifier;
270 };
271
272 struct ad_slave_info {
273 struct aggregator aggregator; /* 802.3ad aggregator structure */
274 struct port port; /* 802.3ad port structure */
275 struct bond_3ad_stats stats;
276 u16 id;
277 };
278
bond_3ad_churn_desc(churn_state_t state)279 static inline const char *bond_3ad_churn_desc(churn_state_t state)
280 {
281 static const char *const churn_description[] = {
282 "monitoring",
283 "churned",
284 "none",
285 "unknown"
286 };
287 int max_size = ARRAY_SIZE(churn_description);
288
289 if (state >= max_size)
290 state = max_size - 1;
291
292 return churn_description[state];
293 }
294
295 /* ========== AD Exported functions to the main bonding code ========== */
296 void bond_3ad_initialize(struct bonding *bond);
297 void bond_3ad_bind_slave(struct slave *slave);
298 void bond_3ad_unbind_slave(struct slave *slave);
299 void bond_3ad_state_machine_handler(struct work_struct *);
300 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
301 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
302 void bond_3ad_handle_link_change(struct slave *slave, char link);
303 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
304 int __bond_3ad_get_active_agg_info(struct bonding *bond,
305 struct ad_info *ad_info);
306 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
307 struct slave *slave);
308 int bond_3ad_set_carrier(struct bonding *bond);
309 void bond_3ad_update_lacp_rate(struct bonding *bond);
310 void bond_3ad_update_ad_actor_settings(struct bonding *bond);
311 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats);
312 size_t bond_3ad_stats_size(void);
313 #endif /* _NET_BOND_3AD_H */
314
315