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 1.6.2.1 2001/12/24 00:59:27 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         rwlock_t                        lock;
  83         struct net_bridge_port          *port_list;
  84         struct net_device               dev;
  85         struct net_device_stats         statistics;
  86         rwlock_t                        hash_lock;
  87         struct net_bridge_fdb_entry     *hash[BR_HASH_SIZE];
  88         struct timer_list               tick;
  89
  90         /* STP */
  91         bridge_id                       designated_root;
  92         int                             root_path_cost;
  93         int                             root_port;
  94         int                             max_age;
  95         int                             hello_time;
  96         int                             forward_delay;
  97         bridge_id                       bridge_id;
  98         int                             bridge_max_age;
  99         int                             bridge_hello_time;
 100         int                             bridge_forward_delay;
 101         unsigned                        stp_enabled:1;
 102         unsigned                        topology_change:1;
 103         unsigned                        topology_change_detected:1;
 104
 105         struct br_timer                 hello_timer;
 106         struct br_timer                 tcn_timer;
 107         struct br_timer                 topology_change_timer;
 108         struct br_timer                 gc_timer;
 109
 110         int                             ageing_time;
 111         int                             gc_interval;
 112 };
 113
 114 extern struct notifier_block br_device_notifier;
 115 extern unsigned char bridge_ula[6];
 116
 117 /* br.c */
 118 extern void br_dec_use_count(void);
 119 extern void br_inc_use_count(void);
 120
 121 /* br_device.c */
 122 extern void br_dev_setup(struct net_device *dev);
 123 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 124
 125 /* br_fdb.c */
 126 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 127                        unsigned char *newaddr);
 128 extern void br_fdb_cleanup(struct net_bridge *br);
 129 extern void br_fdb_delete_by_port(struct net_bridge *br,
 130                            struct net_bridge_port *p);
 131 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 132                                         unsigned char *addr);
 133 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 134 extern int  br_fdb_get_entries(struct net_bridge *br,
 135                         unsigned char *_buf,
 136                         int maxnum,
 137                         int offset);
 138 extern 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 extern void br_deliver(struct net_bridge_port *to,
 145                 struct sk_buff *skb);
 146 extern void br_forward(struct net_bridge_port *to,
 147                 struct sk_buff *skb);
 148 extern void br_flood_deliver(struct net_bridge *br,
 149                       struct sk_buff *skb,
 150                       int clone);
 151 extern void br_flood_forward(struct net_bridge *br,
 152                       struct sk_buff *skb,
 153                       int clone);
 154
 155 /* br_if.c */
 156 extern int br_add_bridge(char *name);
 157 extern int br_del_bridge(char *name);
 158 extern int br_add_if(struct net_bridge *br,
 159               struct net_device *dev);
 160 extern int br_del_if(struct net_bridge *br,
 161               struct net_device *dev);
 162 extern int br_get_bridge_ifindices(int *indices,
 163                             int num);
 164 extern void br_get_port_ifindices(struct net_bridge *br,
 165                            int *ifindices);
 166
 167 /* br_input.c */
 168 extern void br_handle_frame(struct sk_buff *skb);
 169
 170 /* br_ioctl.c */
 171 extern int br_ioctl(struct net_bridge *br,
 172              unsigned int cmd,
 173              unsigned long arg0,
 174              unsigned long arg1,
 175              unsigned long arg2);
 176 extern int br_ioctl_deviceless_stub(unsigned long arg);
 177
 178 /* br_stp.c */
 179 extern int br_is_root_bridge(struct net_bridge *br);
 180 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 181                                     int port_no);
 182 extern void br_init_port(struct net_bridge_port *p);
 183 extern port_id br_make_port_id(struct net_bridge_port *p);
 184 extern void br_become_designated_port(struct net_bridge_port *p);
 185
 186 /* br_stp_if.c */
 187 extern void br_stp_enable_bridge(struct net_bridge *br);
 188 extern void br_stp_disable_bridge(struct net_bridge *br);
 189 extern void br_stp_enable_port(struct net_bridge_port *p);
 190 extern void br_stp_disable_port(struct net_bridge_port *p);
 191 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 192 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 193                                 int newprio);
 194 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 195                               int newprio);
 196 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 197                           int path_cost);
 198
 199 /* br_stp_bpdu.c */
 200 extern int br_stp_handle_bpdu(struct sk_buff *skb);
 201
 202 #endif