net/bridge/br_private.h

   1 /*
   2  *      Linux ethernet bridge
   3  *
   4  *      Authors:
   5  *      Lennert Buytenhek               <buytenh@gnu.org>
   6  *
   7  *      $Id: br_private.h,v 1.3 2000/05/05 02:17:17 davem Exp $
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License
  11  *      as published by the Free Software Foundation; either version
  12  *      2 of the License, or (at your option) any later version.
  13  */
  14
  15 #ifndef _BR_PRIVATE_H
  16 #define _BR_PRIVATE_H
  17
  18 #include <linux/netdevice.h>
  19 #include <linux/miscdevice.h>
  20 #include <linux/if_bridge.h>
  21 #include "br_private_timer.h"
  22
  23 #define BR_HASH_BITS 8
  24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  25
  26 #define BR_HOLD_TIME (1*HZ)
  27
  28 typedef struct bridge_id bridge_id;
  29 typedef struct mac_addr mac_addr;
  30 typedef __u16 port_id;
  31
  32 struct bridge_id
  33 {
  34         unsigned char   prio[2];
  35         unsigned char   addr[6];
  36 };
  37
  38 struct mac_addr
  39 {
  40         unsigned char   addr[6];
  41         unsigned char   pad[2];
  42 };
  43
  44 struct net_bridge_fdb_entry
  45 {
  46         struct net_bridge_fdb_entry     *next_hash;
  47         struct net_bridge_fdb_entry     **pprev_hash;
  48         atomic_t                        use_count;
  49         mac_addr                        addr;
  50         struct net_bridge_port          *dst;
  51         unsigned long                   ageing_timer;
  52         unsigned                        is_local:1;
  53         unsigned                        is_static:1;
  54 };
  55
  56 struct net_bridge_port
  57 {
  58         struct net_bridge_port          *next;
  59         struct net_bridge               *br;
  60         struct net_device               *dev;
  61         int                             port_no;
  62
  63         /* STP */
  64         port_id                         port_id;
  65         int                             state;
  66         int                             path_cost;
  67         bridge_id                       designated_root;
  68         int                             designated_cost;
  69         bridge_id                       designated_bridge;
  70         port_id                         designated_port;
  71         unsigned                        topology_change_ack:1;
  72         unsigned                        config_pending:1;
  73         int                             priority;
  74
  75         struct br_timer                 forward_delay_timer;
  76         struct br_timer                 hold_timer;
  77         struct br_timer                 message_age_timer;
  78 };
  79
  80 struct net_bridge
  81 {
  82         struct net_bridge               *next;
  83         rwlock_t                        lock;
  84         struct net_bridge_port          *port_list;
  85         struct net_device               dev;
  86         struct net_device_stats         statistics;
  87         rwlock_t                        hash_lock;
  88         struct net_bridge_fdb_entry     *hash[BR_HASH_SIZE];
  89         struct timer_list               tick;
  90
  91         /* STP */
  92         bridge_id                       designated_root;
  93         int                             root_path_cost;
  94         int                             root_port;
  95         int                             max_age;
  96         int                             hello_time;
  97         int                             forward_delay;
  98         bridge_id                       bridge_id;
  99         int                             bridge_max_age;
 100         int                             bridge_hello_time;
 101         int                             bridge_forward_delay;
 102         unsigned                        stp_enabled:1;
 103         unsigned                        topology_change:1;
 104         unsigned                        topology_change_detected:1;
 105
 106         struct br_timer                 hello_timer;
 107         struct br_timer                 tcn_timer;
 108         struct br_timer                 topology_change_timer;
 109         struct br_timer                 gc_timer;
 110
 111         int                             ageing_time;
 112         int                             gc_interval;
 113 };
 114
 115 struct notifier_block br_device_notifier;
 116 unsigned char bridge_ula[6];
 117
 118 /* br.c */
 119 void br_dec_use_count(void);
 120 void br_inc_use_count(void);
 121
 122 /* br_device.c */
 123 void br_dev_setup(struct net_device *dev);
 124
 125 /* br_fdb.c */
 126 void br_fdb_changeaddr(struct net_bridge_port *p,
 127                        unsigned char *newaddr);
 128 void br_fdb_cleanup(struct net_bridge *br);
 129 void br_fdb_delete_by_port(struct net_bridge *br,
 130                            struct net_bridge_port *p);
 131 struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 132                                         unsigned char *addr);
 133 void br_fdb_put(struct net_bridge_fdb_entry *ent);
 134 int  br_fdb_get_entries(struct net_bridge *br,
 135                         unsigned char *_buf,
 136                         int maxnum,
 137                         int offset);
 138 void br_fdb_insert(struct net_bridge *br,
 139                    struct net_bridge_port *source,
 140                    unsigned char *addr,
 141                    int is_local);
 142
 143 /* br_forward.c */
 144 void br_forward(struct net_bridge_port *to,
 145                 struct sk_buff *skb);
 146 void br_flood(struct net_bridge *br,
 147               struct sk_buff *skb,
 148               int clone);
 149
 150 /* br_if.c */
 151 int br_add_bridge(char *name);
 152 int br_del_bridge(char *name);
 153 int br_add_if(struct net_bridge *br,
 154               struct net_device *dev);
 155 int br_del_if(struct net_bridge *br,
 156               struct net_device *dev);
 157 int br_get_bridge_ifindices(int *indices,
 158                             int num);
 159 void br_get_port_ifindices(struct net_bridge *br,
 160                            int *ifindices);
 161
 162 /* br_input.c */
 163 void br_handle_frame(struct sk_buff *skb);
 164
 165 /* br_ioctl.c */
 166 void br_call_ioctl_atomic(void (*fn)(void));
 167 int br_ioctl(struct net_bridge *br,
 168              unsigned int cmd,
 169              unsigned long arg0,
 170              unsigned long arg1,
 171              unsigned long arg2);
 172 int br_ioctl_deviceless_stub(unsigned long arg);
 173
 174 /* br_stp.c */
 175 int br_is_root_bridge(struct net_bridge *br);
 176 struct net_bridge_port *br_get_port(struct net_bridge *br,
 177                                     int port_no);
 178 void br_init_port(struct net_bridge_port *p);
 179 port_id br_make_port_id(struct net_bridge_port *p);
 180 void br_become_designated_port(struct net_bridge_port *p);
 181
 182 /* br_stp_if.c */
 183 void br_stp_enable_bridge(struct net_bridge *br);
 184 void br_stp_disable_bridge(struct net_bridge *br);
 185 void br_stp_enable_port(struct net_bridge_port *p);
 186 void br_stp_disable_port(struct net_bridge_port *p);
 187 void br_stp_recalculate_bridge_id(struct net_bridge *br);
 188 void br_stp_set_bridge_priority(struct net_bridge *br,
 189                                 int newprio);
 190 void br_stp_set_port_priority(struct net_bridge_port *p,
 191                               int newprio);
 192 void br_stp_set_path_cost(struct net_bridge_port *p,
 193                           int path_cost);
 194
 195 /* br_stp_bpdu.c */
 196 void br_stp_handle_bpdu(struct sk_buff *skb);
 197
 198 #endif