include/net/bond_3ad.h

   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 MULTICAST_LACPDU_ADDR    {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}
  19
  20 #define AD_LACP_SLOW 0
  21 #define AD_LACP_FAST 1
  22
  23 typedef struct mac_addr {
  24         u8 mac_addr_value[ETH_ALEN];
  25 } __packed mac_addr_t;
  26
  27 enum {
  28         BOND_AD_STABLE = 0,
  29         BOND_AD_BANDWIDTH = 1,
  30         BOND_AD_COUNT = 2,
  31 };
  32
  33 /* rx machine states(43.4.11 in the 802.3ad standard) */
  34 typedef enum {
  35         AD_RX_DUMMY,
  36         AD_RX_INITIALIZE,       /* rx Machine */
  37         AD_RX_PORT_DISABLED,    /* rx Machine */
  38         AD_RX_LACP_DISABLED,    /* rx Machine */
  39         AD_RX_EXPIRED,          /* rx Machine */
  40         AD_RX_DEFAULTED,        /* rx Machine */
  41         AD_RX_CURRENT           /* rx Machine */
  42 } rx_states_t;
  43
  44 /* periodic machine states(43.4.12 in the 802.3ad standard) */
  45 typedef enum {
  46         AD_PERIODIC_DUMMY,
  47         AD_NO_PERIODIC,         /* periodic machine */
  48         AD_FAST_PERIODIC,       /* periodic machine */
  49         AD_SLOW_PERIODIC,       /* periodic machine */
  50         AD_PERIODIC_TX          /* periodic machine */
  51 } periodic_states_t;
  52
  53 /* mux machine states(43.4.13 in the 802.3ad standard) */
  54 typedef enum {
  55         AD_MUX_DUMMY,
  56         AD_MUX_DETACHED,        /* mux machine */
  57         AD_MUX_WAITING,         /* mux machine */
  58         AD_MUX_ATTACHED,        /* mux machine */
  59         AD_MUX_COLLECTING_DISTRIBUTING  /* mux machine */
  60 } mux_states_t;
  61
  62 /* tx machine states(43.4.15 in the 802.3ad standard) */
  63 typedef enum {
  64         AD_TX_DUMMY,
  65         AD_TRANSMIT             /* tx Machine */
  66 } tx_states_t;
  67
  68 /* churn machine states(43.4.17 in the 802.3ad standard) */
  69 typedef enum {
  70          AD_CHURN_MONITOR, /* monitoring for churn */
  71          AD_CHURN,         /* churn detected (error) */
  72          AD_NO_CHURN       /* no churn (no error) */
  73 } churn_state_t;
  74
  75 /* rx indication types */
  76 typedef enum {
  77         AD_TYPE_LACPDU = 1,     /* type lacpdu */
  78         AD_TYPE_MARKER          /* type marker */
  79 } pdu_type_t;
  80
  81 /* rx marker indication types */
  82 typedef enum {
  83         AD_MARKER_INFORMATION_SUBTYPE = 1,      /* marker imformation subtype */
  84         AD_MARKER_RESPONSE_SUBTYPE              /* marker response subtype */
  85 } bond_marker_subtype_t;
  86
  87 /* timers types(43.4.9 in the 802.3ad standard) */
  88 typedef enum {
  89         AD_CURRENT_WHILE_TIMER,
  90         AD_ACTOR_CHURN_TIMER,
  91         AD_PERIODIC_TIMER,
  92         AD_PARTNER_CHURN_TIMER,
  93         AD_WAIT_WHILE_TIMER
  94 } ad_timers_t;
  95
  96 #pragma pack(1)
  97
  98 /* Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard) */
  99 typedef struct lacpdu {
 100         u8 subtype;             /* = LACP(= 0x01) */
 101         u8 version_number;
 102         u8 tlv_type_actor_info; /* = actor information(type/length/value) */
 103         u8 actor_information_length;    /* = 20 */
 104         __be16 actor_system_priority;
 105         struct mac_addr actor_system;
 106         __be16 actor_key;
 107         __be16 actor_port_priority;
 108         __be16 actor_port;
 109         u8 actor_state;
 110         u8 reserved_3_1[3];             /* = 0 */
 111         u8 tlv_type_partner_info;       /* = partner information */
 112         u8 partner_information_length;  /* = 20 */
 113         __be16 partner_system_priority;
 114         struct mac_addr partner_system;
 115         __be16 partner_key;
 116         __be16 partner_port_priority;
 117         __be16 partner_port;
 118         u8 partner_state;
 119         u8 reserved_3_2[3];             /* = 0 */
 120         u8 tlv_type_collector_info;     /* = collector information */
 121         u8 collector_information_length;/* = 16 */
 122         __be16 collector_max_delay;
 123         u8 reserved_12[12];
 124         u8 tlv_type_terminator;         /* = terminator */
 125         u8 terminator_length;           /* = 0 */
 126         u8 reserved_50[50];             /* = 0 */
 127 } __packed lacpdu_t;
 128
 129 typedef struct lacpdu_header {
 130         struct ethhdr hdr;
 131         struct lacpdu lacpdu;
 132 } __packed lacpdu_header_t;
 133
 134 /* Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard) */
 135 typedef struct bond_marker {
 136         u8 subtype;             /* = 0x02  (marker PDU) */
 137         u8 version_number;      /* = 0x01 */
 138         u8 tlv_type;            /* = 0x01  (marker information) */
 139         /* = 0x02  (marker response information) */
 140         u8 marker_length;       /* = 0x16 */
 141         u16 requester_port;     /* The number assigned to the port by the requester */
 142         struct mac_addr requester_system;       /* The requester's system id */
 143         u32 requester_transaction_id;           /* The transaction id allocated by the requester, */
 144         u16 pad;                /* = 0 */
 145         u8 tlv_type_terminator; /* = 0x00 */
 146         u8 terminator_length;   /* = 0x00 */
 147         u8 reserved_90[90];     /* = 0 */
 148 } __packed bond_marker_t;
 149
 150 typedef struct bond_marker_header {
 151         struct ethhdr hdr;
 152         struct bond_marker marker;
 153 } __packed bond_marker_header_t;
 154
 155 #pragma pack()
 156
 157 struct slave;
 158 struct bonding;
 159 struct ad_info;
 160 struct port;
 161
 162 #ifdef __ia64__
 163 #pragma pack(8)
 164 #endif
 165
 166 struct bond_3ad_stats {
 167         atomic64_t lacpdu_rx;
 168         atomic64_t lacpdu_tx;
 169         atomic64_t lacpdu_unknown_rx;
 170         atomic64_t lacpdu_illegal_rx;
 171
 172         atomic64_t marker_rx;
 173         atomic64_t marker_tx;
 174         atomic64_t marker_resp_rx;
 175         atomic64_t marker_resp_tx;
 176         atomic64_t marker_unknown_rx;
 177 };
 178
 179 /* aggregator structure(43.4.5 in the 802.3ad standard) */
 180 typedef struct aggregator {
 181         struct mac_addr aggregator_mac_address;
 182         u16 aggregator_identifier;
 183         bool is_individual;
 184         u16 actor_admin_aggregator_key;
 185         u16 actor_oper_aggregator_key;
 186         struct mac_addr partner_system;
 187         u16 partner_system_priority;
 188         u16 partner_oper_aggregator_key;
 189         u16 receive_state;      /* BOOLEAN */
 190         u16 transmit_state;     /* BOOLEAN */
 191         struct port *lag_ports;
 192         /* ****** PRIVATE PARAMETERS ****** */
 193         struct slave *slave;    /* pointer to the bond slave that this aggregator belongs to */
 194         u16 is_active;          /* BOOLEAN. Indicates if this aggregator is active */
 195         u16 num_of_ports;
 196 } aggregator_t;
 197
 198 struct port_params {
 199         struct mac_addr system;
 200         u16 system_priority;
 201         u16 key;
 202         u16 port_number;
 203         u16 port_priority;
 204         u16 port_state;
 205 };
 206
 207 /* port structure(43.4.6 in the 802.3ad standard) */
 208 typedef struct port {
 209         u16 actor_port_number;
 210         u16 actor_port_priority;
 211         struct mac_addr actor_system;   /* This parameter is added here although it is not specified in the standard, just for simplification */
 212         u16 actor_system_priority;      /* This parameter is added here although it is not specified in the standard, just for simplification */
 213         u16 actor_port_aggregator_identifier;
 214         bool ntt;
 215         u16 actor_admin_port_key;
 216         u16 actor_oper_port_key;
 217         u8 actor_admin_port_state;
 218         u8 actor_oper_port_state;
 219
 220         struct port_params partner_admin;
 221         struct port_params partner_oper;
 222
 223         bool is_enabled;
 224
 225         /* ****** PRIVATE PARAMETERS ****** */
 226         u16 sm_vars;            /* all state machines variables for this port */
 227         rx_states_t sm_rx_state;        /* state machine rx state */
 228         u16 sm_rx_timer_counter;        /* state machine rx timer counter */
 229         periodic_states_t sm_periodic_state;    /* state machine periodic state */
 230         u16 sm_periodic_timer_counter;  /* state machine periodic timer counter */
 231         mux_states_t sm_mux_state;      /* state machine mux state */
 232         u16 sm_mux_timer_counter;       /* state machine mux timer counter */
 233         tx_states_t sm_tx_state;        /* state machine tx state */
 234         u16 sm_tx_timer_counter;        /* state machine tx timer counter(allways on - enter to transmit state 3 time per second) */
 235         u16 sm_churn_actor_timer_counter;
 236         u16 sm_churn_partner_timer_counter;
 237         u32 churn_actor_count;
 238         u32 churn_partner_count;
 239         churn_state_t sm_churn_actor_state;
 240         churn_state_t sm_churn_partner_state;
 241         struct slave *slave;            /* pointer to the bond slave that this port belongs to */
 242         struct aggregator *aggregator;  /* pointer to an aggregator that this port related to */
 243         struct port *next_port_in_aggregator;   /* Next port on the linked list of the parent aggregator */
 244         u32 transaction_id;             /* continuous number for identification of Marker PDU's; */
 245         struct lacpdu lacpdu;           /* the lacpdu that will be sent for this port */
 246 } port_t;
 247
 248 /* system structure */
 249 struct ad_system {
 250         u16 sys_priority;
 251         struct mac_addr sys_mac_addr;
 252 };
 253
 254 #ifdef __ia64__
 255 #pragma pack()
 256 #endif
 257
 258 /* ========== AD Exported structures to the main bonding code ========== */
 259 #define BOND_AD_INFO(bond)   ((bond)->ad_info)
 260 #define SLAVE_AD_INFO(slave) ((slave)->ad_info)
 261
 262 struct ad_bond_info {
 263         struct ad_system system;        /* 802.3ad system structure */
 264         struct bond_3ad_stats stats;
 265         u32 agg_select_timer;           /* Timer to select aggregator after all adapter's hand shakes */
 266         u16 aggregator_identifier;
 267 };
 268
 269 struct ad_slave_info {
 270         struct aggregator aggregator;   /* 802.3ad aggregator structure */
 271         struct port port;               /* 802.3ad port structure */
 272         struct bond_3ad_stats stats;
 273         u16 id;
 274 };
 275
 276 static inline const char *bond_3ad_churn_desc(churn_state_t state)
 277 {
 278         static const char *const churn_description[] = {
 279                 "monitoring",
 280                 "churned",
 281                 "none",
 282                 "unknown"
 283         };
 284         int max_size = ARRAY_SIZE(churn_description);
 285
 286         if (state >= max_size)
 287                 state = max_size - 1;
 288
 289         return churn_description[state];
 290 }
 291
 292 /* ========== AD Exported functions to the main bonding code ========== */
 293 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
 294 void bond_3ad_bind_slave(struct slave *slave);
 295 void bond_3ad_unbind_slave(struct slave *slave);
 296 void bond_3ad_state_machine_handler(struct work_struct *);
 297 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
 298 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave);
 299 void bond_3ad_handle_link_change(struct slave *slave, char link);
 300 int  bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
 301 int  __bond_3ad_get_active_agg_info(struct bonding *bond,
 302                                     struct ad_info *ad_info);
 303 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
 304                          struct slave *slave);
 305 int bond_3ad_set_carrier(struct bonding *bond);
 306 void bond_3ad_update_lacp_rate(struct bonding *bond);
 307 void bond_3ad_update_ad_actor_settings(struct bonding *bond);
 308 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats);
 309 size_t bond_3ad_stats_size(void);
 310 #endif /* _NET_BOND_3AD_H */
 311