drivers/net/bonding/bond_3ad.h

   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 __BOND_3AD_H__
  24 #define __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 // rx indication types
  86 typedef enum {
  87         AD_TYPE_LACPDU = 1,    // type lacpdu
  88         AD_TYPE_MARKER     // type marker
  89 } pdu_type_t;
  90
  91 // rx marker indication types
  92 typedef enum {
  93         AD_MARKER_INFORMATION_SUBTYPE = 1, // marker imformation subtype
  94         AD_MARKER_RESPONSE_SUBTYPE     // marker response subtype
  95 } bond_marker_subtype_t;
  96
  97 // timers types(43.4.9 in the 802.3ad standard)
  98 typedef enum {
  99         AD_CURRENT_WHILE_TIMER,
 100         AD_ACTOR_CHURN_TIMER,
 101         AD_PERIODIC_TIMER,
 102         AD_PARTNER_CHURN_TIMER,
 103         AD_WAIT_WHILE_TIMER
 104 } ad_timers_t;
 105
 106 #pragma pack(1)
 107
 108 // Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard)
 109 typedef struct lacpdu {
 110         u8 subtype;                  // = LACP(= 0x01)
 111         u8 version_number;
 112         u8 tlv_type_actor_info;       // = actor information(type/length/value)
 113         u8 actor_information_length; // = 20
 114         __be16 actor_system_priority;
 115         struct mac_addr actor_system;
 116         __be16 actor_key;
 117         __be16 actor_port_priority;
 118         __be16 actor_port;
 119         u8 actor_state;
 120         u8 reserved_3_1[3];          // = 0
 121         u8 tlv_type_partner_info;     // = partner information
 122         u8 partner_information_length;   // = 20
 123         __be16 partner_system_priority;
 124         struct mac_addr partner_system;
 125         __be16 partner_key;
 126         __be16 partner_port_priority;
 127         __be16 partner_port;
 128         u8 partner_state;
 129         u8 reserved_3_2[3];          // = 0
 130         u8 tlv_type_collector_info;       // = collector information
 131         u8 collector_information_length; // = 16
 132         __be16 collector_max_delay;
 133         u8 reserved_12[12];
 134         u8 tlv_type_terminator;      // = terminator
 135         u8 terminator_length;        // = 0
 136         u8 reserved_50[50];          // = 0
 137 } __packed lacpdu_t;
 138
 139 typedef struct lacpdu_header {
 140         struct ethhdr hdr;
 141         struct lacpdu lacpdu;
 142 } __packed lacpdu_header_t;
 143
 144 // Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard)
 145 typedef struct bond_marker {
 146         u8 subtype;              //  = 0x02  (marker PDU)
 147         u8 version_number;       //  = 0x01
 148         u8 tlv_type;             //  = 0x01  (marker information)
 149         //  = 0x02  (marker response information)
 150         u8 marker_length;        //  = 0x16
 151         u16 requester_port;      //   The number assigned to the port by the requester
 152         struct mac_addr requester_system;      //   The requester's system id
 153         u32 requester_transaction_id;   //   The transaction id allocated by the requester,
 154         u16 pad;                 //  = 0
 155         u8 tlv_type_terminator;      //  = 0x00
 156         u8 terminator_length;        //  = 0x00
 157         u8 reserved_90[90];          //  = 0
 158 } __packed bond_marker_t;
 159
 160 typedef struct bond_marker_header {
 161         struct ethhdr hdr;
 162         struct bond_marker marker;
 163 } __packed bond_marker_header_t;
 164
 165 #pragma pack()
 166
 167 struct slave;
 168 struct bonding;
 169 struct ad_info;
 170 struct port;
 171
 172 #ifdef __ia64__
 173 #pragma pack(8)
 174 #endif
 175
 176 // aggregator structure(43.4.5 in the 802.3ad standard)
 177 typedef struct aggregator {
 178         struct mac_addr aggregator_mac_address;
 179         u16 aggregator_identifier;
 180         bool is_individual;
 181         u16 actor_admin_aggregator_key;
 182         u16 actor_oper_aggregator_key;
 183         struct mac_addr partner_system;
 184         u16 partner_system_priority;
 185         u16 partner_oper_aggregator_key;
 186         u16 receive_state;              // BOOLEAN
 187         u16 transmit_state;             // BOOLEAN
 188         struct port *lag_ports;
 189         // ****** PRIVATE PARAMETERS ******
 190         struct slave *slave;        // pointer to the bond slave that this aggregator belongs to
 191         u16 is_active;      // BOOLEAN. Indicates if this aggregator is active
 192         u16 num_of_ports;
 193 } aggregator_t;
 194
 195 struct port_params {
 196         struct mac_addr system;
 197         u16 system_priority;
 198         u16 key;
 199         u16 port_number;
 200         u16 port_priority;
 201         u16 port_state;
 202 };
 203
 204 // port structure(43.4.6 in the 802.3ad standard)
 205 typedef struct port {
 206         u16 actor_port_number;
 207         u16 actor_port_priority;
 208         struct mac_addr actor_system;          // This parameter is added here although it is not specified in the standard, just for simplification
 209         u16 actor_system_priority;       // This parameter is added here although it is not specified in the standard, just for simplification
 210         u16 actor_port_aggregator_identifier;
 211         bool ntt;
 212         u16 actor_admin_port_key;
 213         u16 actor_oper_port_key;
 214         u8 actor_admin_port_state;
 215         u8 actor_oper_port_state;
 216
 217         struct port_params partner_admin;
 218         struct port_params partner_oper;
 219
 220         bool is_enabled;
 221
 222         // ****** PRIVATE PARAMETERS ******
 223         u16 sm_vars;          // all state machines variables for this port
 224         rx_states_t sm_rx_state;        // state machine rx state
 225         u16 sm_rx_timer_counter;    // state machine rx timer counter
 226         periodic_states_t sm_periodic_state;// state machine periodic state
 227         u16 sm_periodic_timer_counter;  // state machine periodic timer counter
 228         mux_states_t sm_mux_state;      // state machine mux state
 229         u16 sm_mux_timer_counter;   // state machine mux timer counter
 230         tx_states_t sm_tx_state;        // state machine tx state
 231         u16 sm_tx_timer_counter;    // state machine tx timer counter(allways on - enter to transmit state 3 time per second)
 232         struct slave *slave;        // pointer to the bond slave that this port belongs to
 233         struct aggregator *aggregator;     // pointer to an aggregator that this port related to
 234         struct port *next_port_in_aggregator; // Next port on the linked list of the parent aggregator
 235         u32 transaction_id;         // continuous number for identification of Marker PDU's;
 236         struct lacpdu lacpdu;          // the lacpdu that will be sent for this port
 237 } port_t;
 238
 239 // system structure
 240 struct ad_system {
 241         u16 sys_priority;
 242         struct mac_addr sys_mac_addr;
 243 };
 244
 245 #ifdef __ia64__
 246 #pragma pack()
 247 #endif
 248
 249 // ================= AD Exported structures to the main bonding code ==================
 250 #define BOND_AD_INFO(bond)   ((bond)->ad_info)
 251 #define SLAVE_AD_INFO(slave) ((slave)->ad_info)
 252
 253 struct ad_bond_info {
 254         struct ad_system system;            /* 802.3ad system structure */
 255         u32 agg_select_timer;       // Timer to select aggregator after all adapter's hand shakes
 256         u16 aggregator_identifier;
 257 };
 258
 259 struct ad_slave_info {
 260         struct aggregator aggregator;       // 802.3ad aggregator structure
 261         struct port port;                   // 802.3ad port structure
 262         spinlock_t state_machine_lock; /* mutex state machines vs.
 263                                           incoming LACPDU */
 264         u16 id;
 265 };
 266
 267 // ================= AD Exported functions to the main bonding code ==================
 268 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
 269 int  bond_3ad_bind_slave(struct slave *slave);
 270 void bond_3ad_unbind_slave(struct slave *slave);
 271 void bond_3ad_state_machine_handler(struct work_struct *);
 272 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
 273 void bond_3ad_adapter_speed_changed(struct slave *slave);
 274 void bond_3ad_adapter_duplex_changed(struct slave *slave);
 275 void bond_3ad_handle_link_change(struct slave *slave, char link);
 276 int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
 277 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev);
 278 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
 279                           struct slave *slave);
 280 int bond_3ad_set_carrier(struct bonding *bond);
 281 void bond_3ad_update_lacp_rate(struct bonding *bond);
 282 #endif //__BOND_3AD_H__
 283