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Linux/include/net/bond_3ad.h

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  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         u32 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 
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 = sizeof(churn_description) / sizeof(churn_description[0]);
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_changed(struct slave *slave);
301 void bond_3ad_adapter_duplex_changed(struct slave *slave);
302 void bond_3ad_handle_link_change(struct slave *slave, char link);
303 int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
304 int  __bond_3ad_get_active_agg_info(struct bonding *bond,
305                                     struct ad_info *ad_info);
306 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
307                          struct slave *slave);
308 int bond_3ad_set_carrier(struct bonding *bond);
309 void bond_3ad_update_lacp_rate(struct bonding *bond);
310 #endif /* _NET_BOND_3AD_H */
311 
312 

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