summaryrefslogtreecommitdiff
path: root/drivers/net/bonding/bond_3ad.h
blob: 0ee3f1632c465e6eef58c644c1ea7cef163a485a (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
/*
 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 */

#ifndef __BOND_3AD_H__
#define __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 MULTICAST_LACPDU_ADDR    {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}

#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;

// 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

// 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)
	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 */
	u32 agg_select_timer;	    // Timer to select aggregator after all adapter's hand shakes
	u32 agg_select_mode;	    // Mode of selection of active aggregator(bandwidth/count)
	int lacp_fast;		/* whether fast periodic tx should be
				 * requested
				 */
	struct timer_list ad_timer;
};

struct ad_slave_info {
	struct aggregator aggregator;	    // 802.3ad aggregator structure
	struct port port;		    // 802.3ad port structure
	spinlock_t state_machine_lock; /* mutex state machines vs.
					  incoming LACPDU */
	u16 id;
};

// ================= AD Exported functions to the main bonding code ==================
void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast);
int  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_changed(struct slave *slave);
void bond_3ad_adapter_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_xmit_xor(struct sk_buff *skb, struct net_device *dev);
void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
			  struct slave *slave);
int bond_3ad_set_carrier(struct bonding *bond);
#endif //__BOND_3AD_H__