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         union {
  50                 struct list_head        age_list;
  51                 struct rcu_head         rcu;
  52         } u;
  53         atomic_t                        use_count;
  54         unsigned long                   ageing_timer;
  55         mac_addr                        addr;
  56         unsigned char                   is_local;
  57         unsigned char                   is_static;
  58 };
  59
  60 struct net_bridge_port
  61 {
  62         struct net_bridge               *br;
  63         struct net_device               *dev;
  64         struct list_head                list;
  65
  66         /* STP */
  67         u8                              priority;
  68         u8                              state;
  69         u16                             port_no;
  70         unsigned char                   topology_change_ack;
  71         unsigned char                   config_pending;
  72         port_id                         port_id;
  73         port_id                         designated_port;
  74         bridge_id                       designated_root;
  75         bridge_id                       designated_bridge;
  76         u32                             path_cost;
  77         u32                             designated_cost;
  78
  79         struct timer_list               forward_delay_timer;
  80         struct timer_list               hold_timer;
  81         struct timer_list               message_age_timer;
  82         struct kobject                  kobj;
  83         struct rcu_head                 rcu;
  84 };
  85
  86 struct net_bridge
  87 {
  88         spinlock_t                      lock;
  89         struct list_head                port_list;
  90         struct net_device               *dev;
  91         struct net_device_stats         statistics;
  92         spinlock_t                      hash_lock;
  93         struct hlist_head               hash[BR_HASH_SIZE];
  94         struct list_head                age_list;
  95
  96         /* STP */
  97         bridge_id                       designated_root;
  98         bridge_id                       bridge_id;
  99         u32                             root_path_cost;
 100         unsigned long                   max_age;
 101         unsigned long                   hello_time;
 102         unsigned long                   forward_delay;
 103         unsigned long                   bridge_max_age;
 104         unsigned long                   ageing_time;
 105         unsigned long                   bridge_hello_time;
 106         unsigned long                   bridge_forward_delay;
 107
 108         u16                             root_port;
 109         unsigned char                   stp_enabled;
 110         unsigned char                   topology_change;
 111         unsigned char                   topology_change_detected;
 112
 113         struct timer_list               hello_timer;
 114         struct timer_list               tcn_timer;
 115         struct timer_list               topology_change_timer;
 116         struct timer_list               gc_timer;
 117         struct kobject                  ifobj;
 118 };
 119
 120 extern struct notifier_block br_device_notifier;
 121 extern const unsigned char bridge_ula[6];
 122
 123 /* called under bridge lock */
 124 static inline int br_is_root_bridge(const struct net_bridge *br)
 125 {
 126         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 127 }
 128
 129
 130 /* br_device.c */
 131 extern void br_dev_setup(struct net_device *dev);
 132 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 133
 134 /* br_fdb.c */
 135 extern void br_fdb_init(void);
 136 extern void br_fdb_fini(void);
 137 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 138                               const unsigned char *newaddr);
 139 extern void br_fdb_cleanup(unsigned long arg);
 140 extern void br_fdb_delete_by_port(struct net_bridge *br,
 141                            struct net_bridge_port *p);
 142 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 143                                                  const unsigned char *addr);
 144 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 145                                                unsigned char *addr);
 146 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 147 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 148                           unsigned long count, unsigned long off);
 149 extern int br_fdb_insert(struct net_bridge *br,
 150                          struct net_bridge_port *source,
 151                          const unsigned char *addr,
 152                          int is_local);
 153
 154 /* br_forward.c */
 155 extern void br_deliver(const struct net_bridge_port *to,
 156                 struct sk_buff *skb);
 157 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 158 extern void br_forward(const struct net_bridge_port *to,
 159                 struct sk_buff *skb);
 160 extern int br_forward_finish(struct sk_buff *skb);
 161 extern void br_flood_deliver(struct net_bridge *br,
 162                       struct sk_buff *skb,
 163                       int clone);
 164 extern void br_flood_forward(struct net_bridge *br,
 165                       struct sk_buff *skb,
 166                       int clone);
 167
 168 /* br_if.c */
 169 extern int br_add_bridge(const char *name);
 170 extern int br_del_bridge(const char *name);
 171 extern void br_cleanup_bridges(void);
 172 extern int br_add_if(struct net_bridge *br,
 173               struct net_device *dev);
 174 extern int br_del_if(struct net_bridge *br,
 175               struct net_device *dev);
 176 extern int br_min_mtu(const struct net_bridge *br);
 177
 178 /* br_input.c */
 179 extern int br_handle_frame_finish(struct sk_buff *skb);
 180 extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb);
 181
 182 /* br_ioctl.c */
 183 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 184 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
 185
 186 /* br_netfilter.c */
 187 extern int br_netfilter_init(void);
 188 extern void br_netfilter_fini(void);
 189
 190 /* br_stp.c */
 191 extern void br_log_state(const struct net_bridge_port *p);
 192 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 193                                            u16 port_no);
 194 extern void br_init_port(struct net_bridge_port *p);
 195 extern void br_become_designated_port(struct net_bridge_port *p);
 196
 197 /* br_stp_if.c */
 198 extern void br_stp_enable_bridge(struct net_bridge *br);
 199 extern void br_stp_disable_bridge(struct net_bridge *br);
 200 extern void br_stp_enable_port(struct net_bridge_port *p);
 201 extern void br_stp_disable_port(struct net_bridge_port *p);
 202 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 203 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 204                                        u16 newprio);
 205 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 206                                      u8 newprio);
 207 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 208                                  u32 path_cost);
 209 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 210
 211 /* br_stp_bpdu.c */
 212 extern int br_stp_handle_bpdu(struct sk_buff *skb);
 213
 214 /* br_stp_timer.c */
 215 extern void br_stp_timer_init(struct net_bridge *br);
 216 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 217 extern unsigned long br_timer_value(const struct timer_list *timer);
 218
 219 #ifdef CONFIG_SYSFS
 220 /* br_sysfs_if.c */
 221 extern int br_sysfs_addif(struct net_bridge_port *p);
 222 extern void br_sysfs_removeif(struct net_bridge_port *p);
 223 extern void br_sysfs_freeif(struct net_bridge_port *p);
 224
 225 /* br_sysfs_br.c */
 226 extern int br_sysfs_addbr(struct net_device *dev);
 227 extern void br_sysfs_delbr(struct net_device *dev);
 228
 229 #else
 230
 231 #define br_sysfs_addif(p)       (0)
 232 #define br_sysfs_removeif(p)    do { } while(0)
 233 #define br_sysfs_freeif(p)      kfree(p)
 234 #define br_sysfs_addbr(dev)     (0)
 235 #define br_sysfs_delbr(dev)     do { } while(0)
 236 #endif /* CONFIG_SYSFS */
 237
 238 #endif