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 MULTICAST_LACPDU_ADDR    {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}
19 
20 #define AD_LACP_SLOW 0
21 #define AD_LACP_FAST 1
22 
23 typedef struct mac_addr {
24 	u8 mac_addr_value[ETH_ALEN];
25 } __packed mac_addr_t;
26 
27 enum {
28 	BOND_AD_STABLE = 0,
29 	BOND_AD_BANDWIDTH = 1,
30 	BOND_AD_COUNT = 2,
31 };
32 
33 /* rx machine states(43.4.11 in the 802.3ad standard) */
34 typedef enum {
35 	AD_RX_DUMMY,
36 	AD_RX_INITIALIZE,	/* rx Machine */
37 	AD_RX_PORT_DISABLED,	/* rx Machine */
38 	AD_RX_LACP_DISABLED,	/* rx Machine */
39 	AD_RX_EXPIRED,		/* rx Machine */
40 	AD_RX_DEFAULTED,	/* rx Machine */
41 	AD_RX_CURRENT		/* rx Machine */
42 } rx_states_t;
43 
44 /* periodic machine states(43.4.12 in the 802.3ad standard) */
45 typedef enum {
46 	AD_PERIODIC_DUMMY,
47 	AD_NO_PERIODIC,		/* periodic machine */
48 	AD_FAST_PERIODIC,	/* periodic machine */
49 	AD_SLOW_PERIODIC,	/* periodic machine */
50 	AD_PERIODIC_TX		/* periodic machine */
51 } periodic_states_t;
52 
53 /* mux machine states(43.4.13 in the 802.3ad standard) */
54 typedef enum {
55 	AD_MUX_DUMMY,
56 	AD_MUX_DETACHED,	/* mux machine */
57 	AD_MUX_WAITING,		/* mux machine */
58 	AD_MUX_ATTACHED,	/* 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(allways on - enter to transmit state 3 time per second) */
235 	u16 sm_churn_actor_timer_counter;
236 	u16 sm_churn_partner_timer_counter;
237 	u32 churn_actor_count;
238 	u32 churn_partner_count;
239 	churn_state_t sm_churn_actor_state;
240 	churn_state_t sm_churn_partner_state;
241 	struct slave *slave;		/* pointer to the bond slave that this port belongs to */
242 	struct aggregator *aggregator;	/* pointer to an aggregator that this port related to */
243 	struct port *next_port_in_aggregator;	/* Next port on the linked list of the parent aggregator */
244 	u32 transaction_id;		/* continuous number for identification of Marker PDU's; */
245 	struct lacpdu lacpdu;		/* the lacpdu that will be sent for this port */
246 } port_t;
247 
248 /* system structure */
249 struct ad_system {
250 	u16 sys_priority;
251 	struct mac_addr sys_mac_addr;
252 };
253 
254 #ifdef __ia64__
255 #pragma pack()
256 #endif
257 
258 /* ========== AD Exported structures to the main bonding code ========== */
259 #define BOND_AD_INFO(bond)   ((bond)->ad_info)
260 #define SLAVE_AD_INFO(slave) ((slave)->ad_info)
261 
262 struct ad_bond_info {
263 	struct ad_system system;	/* 802.3ad system structure */
264 	struct bond_3ad_stats stats;
265 	atomic_t agg_select_timer;		/* Timer to select aggregator after all adapter's hand shakes */
266 	u16 aggregator_identifier;
267 };
268 
269 struct ad_slave_info {
270 	struct aggregator aggregator;	/* 802.3ad aggregator structure */
271 	struct port port;		/* 802.3ad port structure */
272 	struct bond_3ad_stats stats;
273 	u16 id;
274 };
275 
bond_3ad_churn_desc(churn_state_t state)276 static inline const char *bond_3ad_churn_desc(churn_state_t state)
277 {
278 	static const char *const churn_description[] = {
279 		"monitoring",
280 		"churned",
281 		"none",
282 		"unknown"
283 	};
284 	int max_size = ARRAY_SIZE(churn_description);
285 
286 	if (state >= max_size)
287 		state = max_size - 1;
288 
289 	return churn_description[state];
290 }
291 
292 /* ========== AD Exported functions to the main bonding code ========== */
293 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
294 void bond_3ad_bind_slave(struct slave *slave);
295 void bond_3ad_unbind_slave(struct slave *slave);
296 void bond_3ad_state_machine_handler(struct work_struct *);
297 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
298 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
299 void bond_3ad_handle_link_change(struct slave *slave, char link);
300 int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
301 int  __bond_3ad_get_active_agg_info(struct bonding *bond,
302 				    struct ad_info *ad_info);
303 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
304 			 struct slave *slave);
305 int bond_3ad_set_carrier(struct bonding *bond);
306 void bond_3ad_update_lacp_active(struct bonding *bond);
307 void bond_3ad_update_lacp_rate(struct bonding *bond);
308 void bond_3ad_update_ad_actor_settings(struct bonding *bond);
309 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats);
310 size_t bond_3ad_stats_size(void);
311 #endif /* _NET_BOND_3AD_H */
312 
313