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 1.7 2001/12/24 00:59:55 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
  22 #define BR_HASH_BITS 8
  23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  24
  25 #define BR_HOLD_TIME (1*HZ)
  26
  27 #define BR_PORT_BITS    10
  28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  29
  30 typedef struct bridge_id bridge_id;
  31 typedef struct mac_addr mac_addr;
  32 typedef __u16 port_id;
  33
  34 struct bridge_id
  35 {
  36         unsigned char   prio[2];
  37         unsigned char   addr[6];
  38 };
  39
  40 struct mac_addr
  41 {
  42         unsigned char   addr[6];
  43 };
  44
  45 struct net_bridge_fdb_entry
  46 {
  47         struct hlist_node               hlist;
  48         struct net_bridge_port          *dst;
  49         struct list_head                age_list;
  50         atomic_t                        use_count;
  51         unsigned long                   ageing_timer;
  52         mac_addr                        addr;
  53         unsigned char                   is_local;
  54         unsigned char                   is_static;
  55 };
  56
  57 struct net_bridge_port
  58 {
  59         struct net_bridge               *br;
  60         struct net_device               *dev;
  61         struct list_head                list;
  62
  63         /* STP */
  64         u8                              priority;
  65         u8                              state;
  66         u16                             port_no;
  67         unsigned char                   topology_change_ack;
  68         unsigned char                   config_pending;
  69         port_id                         port_id;
  70         port_id                         designated_port;
  71         bridge_id                       designated_root;
  72         bridge_id                       designated_bridge;
  73         u32                             path_cost;
  74         u32                             designated_cost;
  75
  76         struct timer_list               forward_delay_timer;
  77         struct timer_list               hold_timer;
  78         struct timer_list               message_age_timer;
  79         struct rcu_head                 rcu;
  80 };
  81
  82 struct net_bridge
  83 {
  84         spinlock_t                      lock;
  85         struct list_head                port_list;
  86         struct net_device               *dev;
  87         struct net_device_stats         statistics;
  88         rwlock_t                        hash_lock;
  89         struct hlist_head               hash[BR_HASH_SIZE];
  90         struct list_head                age_list;
  91
  92         /* STP */
  93         bridge_id                       designated_root;
  94         bridge_id                       bridge_id;
  95         u32                             root_path_cost;
  96         unsigned long                   max_age;
  97         unsigned long                   hello_time;
  98         unsigned long                   forward_delay;
  99         unsigned long                   bridge_max_age;
 100         unsigned long                   ageing_time;
 101         unsigned long                   bridge_hello_time;
 102         unsigned long                   bridge_forward_delay;
 103
 104         u16                             root_port;
 105         unsigned char                   stp_enabled;
 106         unsigned char                   topology_change;
 107         unsigned char                   topology_change_detected;
 108
 109         struct timer_list               hello_timer;
 110         struct timer_list               tcn_timer;
 111         struct timer_list               topology_change_timer;
 112         struct timer_list               gc_timer;
 113 };
 114
 115 extern struct notifier_block br_device_notifier;
 116 extern const unsigned char bridge_ula[6];
 117
 118 /* called under bridge lock */
 119 static inline int br_is_root_bridge(const struct net_bridge *br)
 120 {
 121         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 122 }
 123
 124
 125 /* br_device.c */
 126 extern void br_dev_setup(struct net_device *dev);
 127 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 128
 129 /* br_fdb.c */
 130 extern void br_fdb_init(void);
 131 extern void br_fdb_fini(void);
 132 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 133                               const unsigned char *newaddr);
 134 extern void br_fdb_cleanup(unsigned long arg);
 135 extern void br_fdb_delete_by_port(struct net_bridge *br,
 136                            struct net_bridge_port *p);
 137 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 138                                         unsigned char *addr);
 139 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 140 extern int  br_fdb_get_entries(struct net_bridge *br,
 141                         unsigned char *_buf,
 142                         int maxnum,
 143                         int offset);
 144 extern int br_fdb_insert(struct net_bridge *br,
 145                          struct net_bridge_port *source,
 146                          const unsigned char *addr,
 147                          int is_local);
 148
 149 /* br_forward.c */
 150 extern void br_deliver(const struct net_bridge_port *to,
 151                 struct sk_buff *skb);
 152 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 153 extern void br_forward(const struct net_bridge_port *to,
 154                 struct sk_buff *skb);
 155 extern int br_forward_finish(struct sk_buff *skb);
 156 extern void br_flood_deliver(struct net_bridge *br,
 157                       struct sk_buff *skb,
 158                       int clone);
 159 extern void br_flood_forward(struct net_bridge *br,
 160                       struct sk_buff *skb,
 161                       int clone);
 162
 163 /* br_if.c */
 164 extern int br_add_bridge(const char *name);
 165 extern int br_del_bridge(const char *name);
 166 extern void br_cleanup_bridges(void);
 167 extern int br_add_if(struct net_bridge *br,
 168               struct net_device *dev);
 169 extern int br_del_if(struct net_bridge *br,
 170               struct net_device *dev);
 171 extern int br_get_bridge_ifindices(int *indices,
 172                             int num);
 173 extern void br_get_port_ifindices(struct net_bridge *br,
 174                            int *ifindices, int num);
 175
 176 /* br_input.c */
 177 extern int br_handle_frame_finish(struct sk_buff *skb);
 178 extern int br_handle_frame(struct sk_buff *skb);
 179
 180 /* br_ioctl.c */
 181 extern int br_ioctl_device(struct net_bridge *br,
 182                            unsigned int cmd,
 183                            unsigned long arg0,
 184                            unsigned long arg1,
 185                            unsigned long arg2);
 186 extern int br_ioctl_deviceless_stub(unsigned long arg);
 187
 188 /* br_netfilter.c */
 189 extern int br_netfilter_init(void);
 190 extern void br_netfilter_fini(void);
 191
 192 /* br_stp.c */
 193 extern void br_log_state(const struct net_bridge_port *p);
 194 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 195                                            u16 port_no);
 196 extern void br_init_port(struct net_bridge_port *p);
 197 extern void br_become_designated_port(struct net_bridge_port *p);
 198
 199 /* br_stp_if.c */
 200 extern void br_stp_enable_bridge(struct net_bridge *br);
 201 extern void br_stp_disable_bridge(struct net_bridge *br);
 202 extern void br_stp_enable_port(struct net_bridge_port *p);
 203 extern void br_stp_disable_port(struct net_bridge_port *p);
 204 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 205 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 206                                        u16 newprio);
 207 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 208                                      u8 newprio);
 209 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 210                                  u32 path_cost);
 211
 212 /* br_stp_bpdu.c */
 213 extern int br_stp_handle_bpdu(struct sk_buff *skb);
 214
 215 /* br_stp_timer.c */
 216 extern void br_stp_timer_init(struct net_bridge *br);
 217 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 218
 219 #endif