1 /*
2  * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the Free
6  * Software Foundation; either version 2 of the License, or (at your option)
7  * any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program; if not, write to the Free Software Foundation, Inc., 59
16  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  *
18  * The full GNU General Public License is included in this distribution in the
19  * file called LICENSE.
20  *
21  */
22 
23 #ifndef _NET_BOND_3AD_H
24 #define _NET_BOND_3AD_H
25 
26 #include <asm/byteorder.h>
27 #include <linux/skbuff.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_ether.h>
30 
31 /* General definitions */
32 #define PKT_TYPE_LACPDU         cpu_to_be16(ETH_P_SLOW)
33 #define AD_TIMER_INTERVAL       100 /*msec*/
34 
35 #define MULTICAST_LACPDU_ADDR    {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}
36 
37 #define AD_LACP_SLOW 0
38 #define AD_LACP_FAST 1
39 
40 typedef struct mac_addr {
41 	u8 mac_addr_value[ETH_ALEN];
42 } __packed mac_addr_t;
43 
44 enum {
45 	BOND_AD_STABLE = 0,
46 	BOND_AD_BANDWIDTH = 1,
47 	BOND_AD_COUNT = 2,
48 };
49 
50 /* rx machine states(43.4.11 in the 802.3ad standard) */
51 typedef enum {
52 	AD_RX_DUMMY,
53 	AD_RX_INITIALIZE,	/* rx Machine */
54 	AD_RX_PORT_DISABLED,	/* rx Machine */
55 	AD_RX_LACP_DISABLED,	/* rx Machine */
56 	AD_RX_EXPIRED,		/* rx Machine */
57 	AD_RX_DEFAULTED,	/* rx Machine */
58 	AD_RX_CURRENT		/* rx Machine */
59 } rx_states_t;
60 
61 /* periodic machine states(43.4.12 in the 802.3ad standard) */
62 typedef enum {
63 	AD_PERIODIC_DUMMY,
64 	AD_NO_PERIODIC,		/* periodic machine */
65 	AD_FAST_PERIODIC,	/* periodic machine */
66 	AD_SLOW_PERIODIC,	/* periodic machine */
67 	AD_PERIODIC_TX		/* periodic machine */
68 } periodic_states_t;
69 
70 /* mux machine states(43.4.13 in the 802.3ad standard) */
71 typedef enum {
72 	AD_MUX_DUMMY,
73 	AD_MUX_DETACHED,	/* mux machine */
74 	AD_MUX_WAITING,		/* mux machine */
75 	AD_MUX_ATTACHED,	/* mux machine */
76 	AD_MUX_COLLECTING_DISTRIBUTING	/* mux machine */
77 } mux_states_t;
78 
79 /* tx machine states(43.4.15 in the 802.3ad standard) */
80 typedef enum {
81 	AD_TX_DUMMY,
82 	AD_TRANSMIT		/* tx Machine */
83 } tx_states_t;
84 
85 /* churn machine states(43.4.17 in the 802.3ad standard) */
86 typedef enum {
87 	 AD_CHURN_MONITOR, /* monitoring for churn */
88 	 AD_CHURN,         /* churn detected (error) */
89 	 AD_NO_CHURN       /* no churn (no error) */
90 } churn_state_t;
91 
92 /* rx indication types */
93 typedef enum {
94 	AD_TYPE_LACPDU = 1,	/* type lacpdu */
95 	AD_TYPE_MARKER		/* type marker */
96 } pdu_type_t;
97 
98 /* rx marker indication types */
99 typedef enum {
100 	AD_MARKER_INFORMATION_SUBTYPE = 1,	/* marker imformation subtype */
101 	AD_MARKER_RESPONSE_SUBTYPE		/* marker response subtype */
102 } bond_marker_subtype_t;
103 
104 /* timers types(43.4.9 in the 802.3ad standard) */
105 typedef enum {
106 	AD_CURRENT_WHILE_TIMER,
107 	AD_ACTOR_CHURN_TIMER,
108 	AD_PERIODIC_TIMER,
109 	AD_PARTNER_CHURN_TIMER,
110 	AD_WAIT_WHILE_TIMER
111 } ad_timers_t;
112 
113 #pragma pack(1)
114 
115 /* Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard) */
116 typedef struct lacpdu {
117 	u8 subtype;		/* = LACP(= 0x01) */
118 	u8 version_number;
119 	u8 tlv_type_actor_info;	/* = actor information(type/length/value) */
120 	u8 actor_information_length;	/* = 20 */
121 	__be16 actor_system_priority;
122 	struct mac_addr actor_system;
123 	__be16 actor_key;
124 	__be16 actor_port_priority;
125 	__be16 actor_port;
126 	u8 actor_state;
127 	u8 reserved_3_1[3];		/* = 0 */
128 	u8 tlv_type_partner_info;	/* = partner information */
129 	u8 partner_information_length;	/* = 20 */
130 	__be16 partner_system_priority;
131 	struct mac_addr partner_system;
132 	__be16 partner_key;
133 	__be16 partner_port_priority;
134 	__be16 partner_port;
135 	u8 partner_state;
136 	u8 reserved_3_2[3];		/* = 0 */
137 	u8 tlv_type_collector_info;	/* = collector information */
138 	u8 collector_information_length;/* = 16 */
139 	__be16 collector_max_delay;
140 	u8 reserved_12[12];
141 	u8 tlv_type_terminator;		/* = terminator */
142 	u8 terminator_length;		/* = 0 */
143 	u8 reserved_50[50];		/* = 0 */
144 } __packed lacpdu_t;
145 
146 typedef struct lacpdu_header {
147 	struct ethhdr hdr;
148 	struct lacpdu lacpdu;
149 } __packed lacpdu_header_t;
150 
151 /* Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard) */
152 typedef struct bond_marker {
153 	u8 subtype;		/* = 0x02  (marker PDU) */
154 	u8 version_number;	/* = 0x01 */
155 	u8 tlv_type;		/* = 0x01  (marker information) */
156 	/* = 0x02  (marker response information) */
157 	u8 marker_length;	/* = 0x16 */
158 	u16 requester_port;	/* The number assigned to the port by the requester */
159 	struct mac_addr requester_system;	/* The requester's system id */
160 	u32 requester_transaction_id;		/* The transaction id allocated by the requester, */
161 	u16 pad;		/* = 0 */
162 	u8 tlv_type_terminator;	/* = 0x00 */
163 	u8 terminator_length;	/* = 0x00 */
164 	u8 reserved_90[90];	/* = 0 */
165 } __packed bond_marker_t;
166 
167 typedef struct bond_marker_header {
168 	struct ethhdr hdr;
169 	struct bond_marker marker;
170 } __packed bond_marker_header_t;
171 
172 #pragma pack()
173 
174 struct slave;
175 struct bonding;
176 struct ad_info;
177 struct port;
178 
179 #ifdef __ia64__
180 #pragma pack(8)
181 #endif
182 
183 /* aggregator structure(43.4.5 in the 802.3ad standard) */
184 typedef struct aggregator {
185 	struct mac_addr aggregator_mac_address;
186 	u16 aggregator_identifier;
187 	bool is_individual;
188 	u16 actor_admin_aggregator_key;
189 	u16 actor_oper_aggregator_key;
190 	struct mac_addr partner_system;
191 	u16 partner_system_priority;
192 	u16 partner_oper_aggregator_key;
193 	u16 receive_state;	/* BOOLEAN */
194 	u16 transmit_state;	/* BOOLEAN */
195 	struct port *lag_ports;
196 	/* ****** PRIVATE PARAMETERS ****** */
197 	struct slave *slave;	/* pointer to the bond slave that this aggregator belongs to */
198 	u16 is_active;		/* BOOLEAN. Indicates if this aggregator is active */
199 	u16 num_of_ports;
200 } aggregator_t;
201 
202 struct port_params {
203 	struct mac_addr system;
204 	u16 system_priority;
205 	u16 key;
206 	u16 port_number;
207 	u16 port_priority;
208 	u16 port_state;
209 };
210 
211 /* port structure(43.4.6 in the 802.3ad standard) */
212 typedef struct port {
213 	u16 actor_port_number;
214 	u16 actor_port_priority;
215 	struct mac_addr actor_system;	/* This parameter is added here although it is not specified in the standard, just for simplification */
216 	u16 actor_system_priority;	/* This parameter is added here although it is not specified in the standard, just for simplification */
217 	u16 actor_port_aggregator_identifier;
218 	bool ntt;
219 	u16 actor_admin_port_key;
220 	u16 actor_oper_port_key;
221 	u8 actor_admin_port_state;
222 	u8 actor_oper_port_state;
223 
224 	struct port_params partner_admin;
225 	struct port_params partner_oper;
226 
227 	bool is_enabled;
228 
229 	/* ****** PRIVATE PARAMETERS ****** */
230 	u16 sm_vars;		/* all state machines variables for this port */
231 	rx_states_t sm_rx_state;	/* state machine rx state */
232 	u16 sm_rx_timer_counter;	/* state machine rx timer counter */
233 	periodic_states_t sm_periodic_state;	/* state machine periodic state */
234 	u16 sm_periodic_timer_counter;	/* state machine periodic timer counter */
235 	mux_states_t sm_mux_state;	/* state machine mux state */
236 	u16 sm_mux_timer_counter;	/* state machine mux timer counter */
237 	tx_states_t sm_tx_state;	/* state machine tx state */
238 	u16 sm_tx_timer_counter;	/* state machine tx timer counter(allways on - enter to transmit state 3 time per second) */
239 	u16 sm_churn_actor_timer_counter;
240 	u16 sm_churn_partner_timer_counter;
241 	u32 churn_actor_count;
242 	u32 churn_partner_count;
243 	churn_state_t sm_churn_actor_state;
244 	churn_state_t sm_churn_partner_state;
245 	struct slave *slave;		/* pointer to the bond slave that this port belongs to */
246 	struct aggregator *aggregator;	/* pointer to an aggregator that this port related to */
247 	struct port *next_port_in_aggregator;	/* Next port on the linked list of the parent aggregator */
248 	u32 transaction_id;		/* continuous number for identification of Marker PDU's; */
249 	struct lacpdu lacpdu;		/* the lacpdu that will be sent for this port */
250 } port_t;
251 
252 /* system structure */
253 struct ad_system {
254 	u16 sys_priority;
255 	struct mac_addr sys_mac_addr;
256 };
257 
258 #ifdef __ia64__
259 #pragma pack()
260 #endif
261 
262 /* ========== AD Exported structures to the main bonding code ========== */
263 #define BOND_AD_INFO(bond)   ((bond)->ad_info)
264 #define SLAVE_AD_INFO(slave) ((slave)->ad_info)
265 
266 struct ad_bond_info {
267 	struct ad_system system;	/* 802.3ad system structure */
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 	u16 id;
276 };
277 
bond_3ad_churn_desc(churn_state_t state)278 static inline const char *bond_3ad_churn_desc(churn_state_t state)
279 {
280 	static const char *const churn_description[] = {
281 		"monitoring",
282 		"churned",
283 		"none",
284 		"unknown"
285 	};
286 	int max_size = ARRAY_SIZE(churn_description);
287 
288 	if (state >= max_size)
289 		state = max_size - 1;
290 
291 	return churn_description[state];
292 }
293 
294 /* ========== AD Exported functions to the main bonding code ========== */
295 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
296 void bond_3ad_bind_slave(struct slave *slave);
297 void bond_3ad_unbind_slave(struct slave *slave);
298 void bond_3ad_state_machine_handler(struct work_struct *);
299 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
300 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
301 void bond_3ad_handle_link_change(struct slave *slave, char link);
302 int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
303 int  __bond_3ad_get_active_agg_info(struct bonding *bond,
304 				    struct ad_info *ad_info);
305 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
306 			 struct slave *slave);
307 int bond_3ad_set_carrier(struct bonding *bond);
308 void bond_3ad_update_lacp_rate(struct bonding *bond);
309 void bond_3ad_update_ad_actor_settings(struct bonding *bond);
310 #endif /* _NET_BOND_3AD_H */
311 
312