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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
21typedef struct mac_addr {
22 u8 mac_addr_value[ETH_ALEN];
23} __packed mac_addr_t;
24
25enum {
26 BOND_AD_STABLE = 0,
27 BOND_AD_BANDWIDTH = 1,
28 BOND_AD_COUNT = 2,
29 BOND_AD_PRIO = 3,
30};
31
32/* rx machine states(43.4.11 in the 802.3ad standard) */
33typedef enum {
34 AD_RX_DUMMY,
35 AD_RX_INITIALIZE, /* rx Machine */
36 AD_RX_PORT_DISABLED, /* rx Machine */
37 AD_RX_LACP_DISABLED, /* rx Machine */
38 AD_RX_EXPIRED, /* rx Machine */
39 AD_RX_DEFAULTED, /* rx Machine */
40 AD_RX_CURRENT /* rx Machine */
41} rx_states_t;
42
43/* periodic machine states(43.4.12 in the 802.3ad standard) */
44typedef enum {
45 AD_PERIODIC_DUMMY,
46 AD_NO_PERIODIC, /* periodic machine */
47 AD_FAST_PERIODIC, /* periodic machine */
48 AD_SLOW_PERIODIC, /* periodic machine */
49 AD_PERIODIC_TX /* periodic machine */
50} periodic_states_t;
51
52/* mux machine states(43.4.13 in the 802.3ad standard) */
53typedef enum {
54 AD_MUX_DUMMY,
55 AD_MUX_DETACHED, /* mux machine */
56 AD_MUX_WAITING, /* mux machine */
57 AD_MUX_ATTACHED, /* mux machine */
58 AD_MUX_COLLECTING, /* mux machine */
59 AD_MUX_DISTRIBUTING, /* mux machine */
60 AD_MUX_COLLECTING_DISTRIBUTING /* mux machine */
61} mux_states_t;
62
63/* tx machine states(43.4.15 in the 802.3ad standard) */
64typedef enum {
65 AD_TX_DUMMY,
66 AD_TRANSMIT /* tx Machine */
67} tx_states_t;
68
69/* churn machine states(43.4.17 in the 802.3ad standard) */
70typedef enum {
71 AD_CHURN_MONITOR, /* monitoring for churn */
72 AD_CHURN, /* churn detected (error) */
73 AD_NO_CHURN /* no churn (no error) */
74} churn_state_t;
75
76/* rx indication types */
77typedef enum {
78 AD_TYPE_LACPDU = 1, /* type lacpdu */
79 AD_TYPE_MARKER /* type marker */
80} pdu_type_t;
81
82/* rx marker indication types */
83typedef enum {
84 AD_MARKER_INFORMATION_SUBTYPE = 1, /* marker imformation subtype */
85 AD_MARKER_RESPONSE_SUBTYPE /* marker response subtype */
86} bond_marker_subtype_t;
87
88/* timers types(43.4.9 in the 802.3ad standard) */
89typedef enum {
90 AD_CURRENT_WHILE_TIMER,
91 AD_ACTOR_CHURN_TIMER,
92 AD_PERIODIC_TIMER,
93 AD_PARTNER_CHURN_TIMER,
94 AD_WAIT_WHILE_TIMER
95} ad_timers_t;
96
97#pragma pack(1)
98
99/* Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard) */
100typedef struct lacpdu {
101 u8 subtype; /* = LACP(= 0x01) */
102 u8 version_number;
103 u8 tlv_type_actor_info; /* = actor information(type/length/value) */
104 u8 actor_information_length; /* = 20 */
105 __be16 actor_system_priority;
106 struct mac_addr actor_system;
107 __be16 actor_key;
108 __be16 actor_port_priority;
109 __be16 actor_port;
110 u8 actor_state;
111 u8 reserved_3_1[3]; /* = 0 */
112 u8 tlv_type_partner_info; /* = partner information */
113 u8 partner_information_length; /* = 20 */
114 __be16 partner_system_priority;
115 struct mac_addr partner_system;
116 __be16 partner_key;
117 __be16 partner_port_priority;
118 __be16 partner_port;
119 u8 partner_state;
120 u8 reserved_3_2[3]; /* = 0 */
121 u8 tlv_type_collector_info; /* = collector information */
122 u8 collector_information_length;/* = 16 */
123 __be16 collector_max_delay;
124 u8 reserved_12[12];
125 u8 tlv_type_terminator; /* = terminator */
126 u8 terminator_length; /* = 0 */
127 u8 reserved_50[50]; /* = 0 */
128} __packed lacpdu_t;
129
130typedef struct lacpdu_header {
131 struct ethhdr hdr;
132 struct lacpdu lacpdu;
133} __packed lacpdu_header_t;
134
135/* Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard) */
136typedef struct bond_marker {
137 u8 subtype; /* = 0x02 (marker PDU) */
138 u8 version_number; /* = 0x01 */
139 u8 tlv_type; /* = 0x01 (marker information) */
140 /* = 0x02 (marker response information) */
141 u8 marker_length; /* = 0x16 */
142 u16 requester_port; /* The number assigned to the port by the requester */
143 struct mac_addr requester_system; /* The requester's system id */
144 u32 requester_transaction_id; /* The transaction id allocated by the requester, */
145 u16 pad; /* = 0 */
146 u8 tlv_type_terminator; /* = 0x00 */
147 u8 terminator_length; /* = 0x00 */
148 u8 reserved_90[90]; /* = 0 */
149} __packed bond_marker_t;
150
151typedef struct bond_marker_header {
152 struct ethhdr hdr;
153 struct bond_marker marker;
154} __packed bond_marker_header_t;
155
156#pragma pack()
157
158struct slave;
159struct bonding;
160struct ad_info;
161struct port;
162
163#ifdef __ia64__
164#pragma pack(8)
165#endif
166
167struct bond_3ad_stats {
168 atomic64_t lacpdu_rx;
169 atomic64_t lacpdu_tx;
170 atomic64_t lacpdu_unknown_rx;
171 atomic64_t lacpdu_illegal_rx;
172
173 atomic64_t marker_rx;
174 atomic64_t marker_tx;
175 atomic64_t marker_resp_rx;
176 atomic64_t marker_resp_tx;
177 atomic64_t marker_unknown_rx;
178};
179
180/* aggregator structure(43.4.5 in the 802.3ad standard) */
181typedef struct aggregator {
182 struct mac_addr aggregator_mac_address;
183 u16 aggregator_identifier;
184 bool is_individual;
185 u16 actor_admin_aggregator_key;
186 u16 actor_oper_aggregator_key;
187 struct mac_addr partner_system;
188 u16 partner_system_priority;
189 u16 partner_oper_aggregator_key;
190 u16 receive_state; /* BOOLEAN */
191 u16 transmit_state; /* BOOLEAN */
192 struct port *lag_ports;
193 /* ****** PRIVATE PARAMETERS ****** */
194 struct slave *slave; /* pointer to the bond slave that this aggregator belongs to */
195 u16 is_active; /* BOOLEAN. Indicates if this aggregator is active */
196 u16 num_of_ports;
197} aggregator_t;
198
199struct port_params {
200 struct mac_addr system;
201 u16 system_priority;
202 u16 key;
203 u16 port_number;
204 u16 port_priority;
205 u16 port_state;
206};
207
208/* port structure(43.4.6 in the 802.3ad standard) */
209typedef struct port {
210 u16 actor_port_number;
211 u16 actor_port_priority;
212 struct mac_addr actor_system; /* This parameter is added here although it is not specified in the standard, just for simplification */
213 u16 actor_system_priority; /* This parameter is added here although it is not specified in the standard, just for simplification */
214 u16 actor_port_aggregator_identifier;
215 bool ntt;
216 u16 actor_admin_port_key;
217 u16 actor_oper_port_key;
218 u8 actor_admin_port_state;
219 u8 actor_oper_port_state;
220
221 struct port_params partner_admin;
222 struct port_params partner_oper;
223
224 bool is_enabled;
225
226 /* ****** PRIVATE PARAMETERS ****** */
227 u16 sm_vars; /* all state machines variables for this port */
228 rx_states_t sm_rx_state; /* state machine rx state */
229 u16 sm_rx_timer_counter; /* state machine rx timer counter */
230 periodic_states_t sm_periodic_state; /* state machine periodic state */
231 u16 sm_periodic_timer_counter; /* state machine periodic timer counter */
232 mux_states_t sm_mux_state; /* state machine mux state */
233 u16 sm_mux_timer_counter; /* state machine mux timer counter */
234 tx_states_t sm_tx_state; /* state machine tx state */
235 u16 sm_tx_timer_counter; /* state machine tx timer counter
236 * (always on - enter to transmit
237 * state 3 time per second)
238 */
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 __rcu *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 */
253struct 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
266struct ad_bond_info {
267 struct ad_system system; /* 802.3ad system structure */
268 struct bond_3ad_stats stats;
269 atomic_t agg_select_timer; /* Timer to select aggregator after all adapter's hand shakes */
270 u16 aggregator_identifier;
271};
272
273struct ad_slave_info {
274 struct aggregator aggregator; /* 802.3ad aggregator structure */
275 struct port port; /* 802.3ad port structure */
276 struct bond_3ad_stats stats;
277 u16 id;
278 u16 port_priority;
279};
280
281static inline const char *bond_3ad_churn_desc(churn_state_t state)
282{
283 static const char *const churn_description[] = {
284 "monitoring",
285 "churned",
286 "none",
287 "unknown"
288 };
289 int max_size = ARRAY_SIZE(churn_description);
290
291 if (state >= max_size)
292 state = max_size - 1;
293
294 return churn_description[state];
295}
296
297/* ========== AD Exported functions to the main bonding code ========== */
298void bond_3ad_initialize(struct bonding *bond);
299void bond_3ad_bind_slave(struct slave *slave);
300void bond_3ad_unbind_slave(struct slave *slave);
301void bond_3ad_state_machine_handler(struct work_struct *);
302void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
303void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
304void bond_3ad_handle_link_change(struct slave *slave, char link);
305int bond_3ad_get_active_agg_info(const struct bonding *bond, struct ad_info *ad_info);
306int __bond_3ad_get_active_agg_info(const struct bonding *bond,
307 struct ad_info *ad_info);
308int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
309 struct slave *slave);
310int bond_3ad_set_carrier(struct bonding *bond);
311void bond_3ad_update_lacp_rate(struct bonding *bond);
312void bond_3ad_update_lacp_active(struct bonding *bond);
313void bond_3ad_update_ad_actor_settings(struct bonding *bond);
314int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats);
315size_t bond_3ad_stats_size(void);
316#endif /* _NET_BOND_3AD_H */
317