summaryrefslogtreecommitdiffstats
path: root/include/net/bond_3ad.h
blob: a016f275cb0163babd5f2c9243371c35f5db959f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
 */

#ifndef _NET_BOND_3AD_H
#define _NET_BOND_3AD_H

#include <asm/byteorder.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>

/* General definitions */
#define PKT_TYPE_LACPDU         cpu_to_be16(ETH_P_SLOW)
#define AD_TIMER_INTERVAL       100 /*msec*/

#define AD_LACP_SLOW 0
#define AD_LACP_FAST 1

typedef struct mac_addr {
	u8 mac_addr_value[ETH_ALEN];
} __packed mac_addr_t;

enum {
	BOND_AD_STABLE = 0,
	BOND_AD_BANDWIDTH = 1,
	BOND_AD_COUNT = 2,
};

/* rx machine states(43.4.11 in the 802.3ad standard) */
typedef enum {
	AD_RX_DUMMY,
	AD_RX_INITIALIZE,	/* rx Machine */
	AD_RX_PORT_DISABLED,	/* rx Machine */
	AD_RX_LACP_DISABLED,	/* rx Machine */
	AD_RX_EXPIRED,		/* rx Machine */
	AD_RX_DEFAULTED,	/* rx Machine */
	AD_RX_CURRENT		/* rx Machine */
} rx_states_t;

/* periodic machine states(43.4.12 in the 802.3ad standard) */
typedef enum {
	AD_PERIODIC_DUMMY,
	AD_NO_PERIODIC,		/* periodic machine */
	AD_FAST_PERIODIC,	/* periodic machine */
	AD_SLOW_PERIODIC,	/* periodic machine */
	AD_PERIODIC_TX		/* periodic machine */
} periodic_states_t;

/* mux machine states(43.4.13 in the 802.3ad standard) */
typedef enum {
	AD_MUX_DUMMY,
	AD_MUX_DETACHED,	/* mux machine */
	AD_MUX_WAITING,		/* mux machine */
	AD_MUX_ATTACHED,	/* mux machine */
	AD_MUX_COLLECTING_DISTRIBUTING	/* mux machine */
} mux_states_t;

/* tx machine states(43.4.15 in the 802.3ad standard) */
typedef enum {
	AD_TX_DUMMY,
	AD_TRANSMIT		/* tx Machine */
} tx_states_t;

/* churn machine states(43.4.17 in the 802.3ad standard) */
typedef enum {
	 AD_CHURN_MONITOR, /* monitoring for churn */
	 AD_CHURN,         /* churn detected (error) */
	 AD_NO_CHURN       /* no churn (no error) */
} churn_state_t;

/* rx indication types */
typedef enum {
	AD_TYPE_LACPDU = 1,	/* type lacpdu */
	AD_TYPE_MARKER		/* type marker */
} pdu_type_t;

/* rx marker indication types */
typedef enum {
	AD_MARKER_INFORMATION_SUBTYPE = 1,	/* marker imformation subtype */
	AD_MARKER_RESPONSE_SUBTYPE		/* marker response subtype */
} bond_marker_subtype_t;

/* timers types(43.4.9 in the 802.3ad standard) */
typedef enum {
	AD_CURRENT_WHILE_TIMER,
	AD_ACTOR_CHURN_TIMER,
	AD_PERIODIC_TIMER,
	AD_PARTNER_CHURN_TIMER,
	AD_WAIT_WHILE_TIMER
} ad_timers_t;

#pragma pack(1)

/* Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard) */
typedef struct lacpdu {
	u8 subtype;		/* = LACP(= 0x01) */
	u8 version_number;
	u8 tlv_type_actor_info;	/* = actor information(type/length/value) */
	u8 actor_information_length;	/* = 20 */
	__be16 actor_system_priority;
	struct mac_addr actor_system;
	__be16 actor_key;
	__be16 actor_port_priority;
	__be16 actor_port;
	u8 actor_state;
	u8 reserved_3_1[3];		/* = 0 */
	u8 tlv_type_partner_info;	/* = partner information */
	u8 partner_information_length;	/* = 20 */
	__be16 partner_system_priority;
	struct mac_addr partner_system;
	__be16 partner_key;
	__be16 partner_port_priority;
	__be16 partner_port;
	u8 partner_state;
	u8 reserved_3_2[3];		/* = 0 */
	u8 tlv_type_collector_info;	/* = collector information */
	u8 collector_information_length;/* = 16 */
	__be16 collector_max_delay;
	u8 reserved_12[12];
	u8 tlv_type_terminator;		/* = terminator */
	u8 terminator_length;		/* = 0 */
	u8 reserved_50[50];		/* = 0 */
} __packed lacpdu_t;

typedef struct lacpdu_header {
	struct ethhdr hdr;
	struct lacpdu lacpdu;
} __packed lacpdu_header_t;

/* Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard) */
typedef struct bond_marker {
	u8 subtype;		/* = 0x02  (marker PDU) */
	u8 version_number;	/* = 0x01 */
	u8 tlv_type;		/* = 0x01  (marker information) */
	/* = 0x02  (marker response information) */
	u8 marker_length;	/* = 0x16 */
	u16 requester_port;	/* The number assigned to the port by the requester */
	struct mac_addr requester_system;	/* The requester's system id */
	u32 requester_transaction_id;		/* The transaction id allocated by the requester, */
	u16 pad;		/* = 0 */
	u8 tlv_type_terminator;	/* = 0x00 */
	u8 terminator_length;	/* = 0x00 */
	u8 reserved_90[90];	/* = 0 */
} __packed bond_marker_t;

typedef struct bond_marker_header {
	struct ethhdr hdr;
	struct bond_marker marker;
} __packed bond_marker_header_t;

#pragma pack()

struct slave;
struct bonding;
struct ad_info;
struct port;

#ifdef __ia64__
#pragma pack(8)
#endif

struct bond_3ad_stats {
	atomic64_t lacpdu_rx;
	atomic64_t lacpdu_tx;
	atomic64_t lacpdu_unknown_rx;
	atomic64_t lacpdu_illegal_rx;

	atomic64_t marker_rx;
	atomic64_t marker_tx;
	atomic64_t marker_resp_rx;
	atomic64_t marker_resp_tx;
	atomic64_t marker_unknown_rx;
};

/* aggregator structure(43.4.5 in the 802.3ad standard) */
typedef struct aggregator {
	struct mac_addr aggregator_mac_address;
	u16 aggregator_identifier;
	bool is_individual;
	u16 actor_admin_aggregator_key;
	u16 actor_oper_aggregator_key;
	struct mac_addr partner_system;
	u16 partner_system_priority;
	u16 partner_oper_aggregator_key;
	u16 receive_state;	/* BOOLEAN */
	u16 transmit_state;	/* BOOLEAN */
	struct port *lag_ports;
	/* ****** PRIVATE PARAMETERS ****** */
	struct slave *slave;	/* pointer to the bond slave that this aggregator belongs to */
	u16 is_active;		/* BOOLEAN. Indicates if this aggregator is active */
	u16 num_of_ports;
} aggregator_t;

struct port_params {
	struct mac_addr system;
	u16 system_priority;
	u16 key;
	u16 port_number;
	u16 port_priority;
	u16 port_state;
};

/* port structure(43.4.6 in the 802.3ad standard) */
typedef struct port {
	u16 actor_port_number;
	u16 actor_port_priority;
	struct mac_addr actor_system;	/* This parameter is added here although it is not specified in the standard, just for simplification */
	u16 actor_system_priority;	/* This parameter is added here although it is not specified in the standard, just for simplification */
	u16 actor_port_aggregator_identifier;
	bool ntt;
	u16 actor_admin_port_key;
	u16 actor_oper_port_key;
	u8 actor_admin_port_state;
	u8 actor_oper_port_state;

	struct port_params partner_admin;
	struct port_params partner_oper;

	bool is_enabled;

	/* ****** PRIVATE PARAMETERS ****** */
	u16 sm_vars;		/* all state machines variables for this port */
	rx_states_t sm_rx_state;	/* state machine rx state */
	u16 sm_rx_timer_counter;	/* state machine rx timer counter */
	periodic_states_t sm_periodic_state;	/* state machine periodic state */
	u16 sm_periodic_timer_counter;	/* state machine periodic timer counter */
	mux_states_t sm_mux_state;	/* state machine mux state */
	u16 sm_mux_timer_counter;	/* state machine mux timer counter */
	tx_states_t sm_tx_state;	/* state machine tx state */
	u16 sm_tx_timer_counter;	/* state machine tx timer counter(allways on - enter to transmit state 3 time per second) */
	u16 sm_churn_actor_timer_counter;
	u16 sm_churn_partner_timer_counter;
	u32 churn_actor_count;
	u32 churn_partner_count;
	churn_state_t sm_churn_actor_state;
	churn_state_t sm_churn_partner_state;
	struct slave *slave;		/* pointer to the bond slave that this port belongs to */
	struct aggregator *aggregator;	/* pointer to an aggregator that this port related to */
	struct port *next_port_in_aggregator;	/* Next port on the linked list of the parent aggregator */
	u32 transaction_id;		/* continuous number for identification of Marker PDU's; */
	struct lacpdu lacpdu;		/* the lacpdu that will be sent for this port */
} port_t;

/* system structure */
struct ad_system {
	u16 sys_priority;
	struct mac_addr sys_mac_addr;
};

#ifdef __ia64__
#pragma pack()
#endif

/* ========== AD Exported structures to the main bonding code ========== */
#define BOND_AD_INFO(bond)   ((bond)->ad_info)
#define SLAVE_AD_INFO(slave) ((slave)->ad_info)

struct ad_bond_info {
	struct ad_system system;	/* 802.3ad system structure */
	struct bond_3ad_stats stats;
	atomic_t agg_select_timer;		/* Timer to select aggregator after all adapter's hand shakes */
	u16 aggregator_identifier;
};

struct ad_slave_info {
	struct aggregator aggregator;	/* 802.3ad aggregator structure */
	struct port port;		/* 802.3ad port structure */
	struct bond_3ad_stats stats;
	u16 id;
};

static inline const char *bond_3ad_churn_desc(churn_state_t state)
{
	static const char *const churn_description[] = {
		"monitoring",
		"churned",
		"none",
		"unknown"
	};
	int max_size = ARRAY_SIZE(churn_description);

	if (state >= max_size)
		state = max_size - 1;

	return churn_description[state];
}

/* ========== AD Exported functions to the main bonding code ========== */
void bond_3ad_initialize(struct bonding *bond);
void bond_3ad_bind_slave(struct slave *slave);
void bond_3ad_unbind_slave(struct slave *slave);
void bond_3ad_state_machine_handler(struct work_struct *);
void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
void bond_3ad_handle_link_change(struct slave *slave, char link);
int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
int  __bond_3ad_get_active_agg_info(struct bonding *bond,
				    struct ad_info *ad_info);
int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
			 struct slave *slave);
int bond_3ad_set_carrier(struct bonding *bond);
void bond_3ad_update_lacp_active(struct bonding *bond);
void bond_3ad_update_lacp_rate(struct bonding *bond);
void bond_3ad_update_ad_actor_settings(struct bonding *bond);
int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats);
size_t bond_3ad_stats_size(void);
#endif /* _NET_BOND_3AD_H */