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   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 #define BR_PORT_DEBOUNCE (HZ/10)
  31
  32 #define BR_VERSION      "2.2"
  33
  34 typedef struct bridge_id bridge_id;
  35 typedef struct mac_addr mac_addr;
  36 typedef __u16 port_id;
  37
  38 struct bridge_id
  39 {
  40         unsigned char   prio[2];
  41         unsigned char   addr[6];
  42 };
  43
  44 struct mac_addr
  45 {
  46         unsigned char   addr[6];
  47 };
  48
  49 struct net_bridge_fdb_entry
  50 {
  51         struct hlist_node               hlist;
  52         struct net_bridge_port          *dst;
  53
  54         struct rcu_head                 rcu;
  55         atomic_t                        use_count;
  56         unsigned long                   ageing_timer;
  57         mac_addr                        addr;
  58         unsigned char                   is_local;
  59         unsigned char                   is_static;
  60 };
  61
  62 struct net_bridge_port
  63 {
  64         struct net_bridge               *br;
  65         struct net_device               *dev;
  66         struct list_head                list;
  67
  68         /* STP */
  69         u8                              priority;
  70         u8                              state;
  71         u16                             port_no;
  72         unsigned char                   topology_change_ack;
  73         unsigned char                   config_pending;
  74         port_id                         port_id;
  75         port_id                         designated_port;
  76         bridge_id                       designated_root;
  77         bridge_id                       designated_bridge;
  78         u32                             path_cost;
  79         u32                             designated_cost;
  80
  81         struct timer_list               forward_delay_timer;
  82         struct timer_list               hold_timer;
  83         struct timer_list               message_age_timer;
  84         struct kobject                  kobj;
  85         struct delayed_work             carrier_check;
  86         struct rcu_head                 rcu;
  87 };
  88
  89 struct net_bridge
  90 {
  91         spinlock_t                      lock;
  92         struct list_head                port_list;
  93         struct net_device               *dev;
  94         struct net_device_stats         statistics;
  95         spinlock_t                      hash_lock;
  96         struct hlist_head               hash[BR_HASH_SIZE];
  97         struct list_head                age_list;
  98         unsigned long                   feature_mask;
  99
 100         /* STP */
 101         bridge_id                       designated_root;
 102         bridge_id                       bridge_id;
 103         u32                             root_path_cost;
 104         unsigned long                   max_age;
 105         unsigned long                   hello_time;
 106         unsigned long                   forward_delay;
 107         unsigned long                   bridge_max_age;
 108         unsigned long                   ageing_time;
 109         unsigned long                   bridge_hello_time;
 110         unsigned long                   bridge_forward_delay;
 111
 112         u8                              group_addr[ETH_ALEN];
 113         u16                             root_port;
 114         unsigned char                   stp_enabled;
 115         unsigned char                   topology_change;
 116         unsigned char                   topology_change_detected;
 117
 118         struct timer_list               hello_timer;
 119         struct timer_list               tcn_timer;
 120         struct timer_list               topology_change_timer;
 121         struct timer_list               gc_timer;
 122         struct kobject                  ifobj;
 123 };
 124
 125 extern struct notifier_block br_device_notifier;
 126 extern const u8 br_group_address[ETH_ALEN];
 127
 128 /* called under bridge lock */
 129 static inline int br_is_root_bridge(const struct net_bridge *br)
 130 {
 131         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 132 }
 133
 134
 135 /* br_device.c */
 136 extern void br_dev_setup(struct net_device *dev);
 137 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 138
 139 /* br_fdb.c */
 140 extern void br_fdb_init(void);
 141 extern void br_fdb_fini(void);
 142 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 143                               const unsigned char *newaddr);
 144 extern void br_fdb_cleanup(unsigned long arg);
 145 extern void br_fdb_delete_by_port(struct net_bridge *br,
 146                                   const struct net_bridge_port *p, int do_all);
 147 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 148                                                  const unsigned char *addr);
 149 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 150                                                unsigned char *addr);
 151 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 152 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 153                           unsigned long count, unsigned long off);
 154 extern int br_fdb_insert(struct net_bridge *br,
 155                          struct net_bridge_port *source,
 156                          const unsigned char *addr);
 157 extern void br_fdb_update(struct net_bridge *br,
 158                           struct net_bridge_port *source,
 159                           const unsigned char *addr);
 160
 161 /* br_forward.c */
 162 extern void br_deliver(const struct net_bridge_port *to,
 163                 struct sk_buff *skb);
 164 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 165 extern void br_forward(const struct net_bridge_port *to,
 166                 struct sk_buff *skb);
 167 extern int br_forward_finish(struct sk_buff *skb);
 168 extern void br_flood_deliver(struct net_bridge *br,
 169                       struct sk_buff *skb,
 170                       int clone);
 171 extern void br_flood_forward(struct net_bridge *br,
 172                       struct sk_buff *skb,
 173                       int clone);
 174
 175 /* br_if.c */
 176 extern int br_add_bridge(const char *name);
 177 extern int br_del_bridge(const char *name);
 178 extern void br_cleanup_bridges(void);
 179 extern int br_add_if(struct net_bridge *br,
 180               struct net_device *dev);
 181 extern int br_del_if(struct net_bridge *br,
 182               struct net_device *dev);
 183 extern int br_min_mtu(const struct net_bridge *br);
 184 extern void br_features_recompute(struct net_bridge *br);
 185
 186 /* br_input.c */
 187 extern int br_handle_frame_finish(struct sk_buff *skb);
 188 extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb);
 189
 190 /* br_ioctl.c */
 191 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 192 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
 193
 194 /* br_netfilter.c */
 195 #ifdef CONFIG_BRIDGE_NETFILTER
 196 extern int br_netfilter_init(void);
 197 extern void br_netfilter_fini(void);
 198 #else
 199 #define br_netfilter_init()     (0)
 200 #define br_netfilter_fini()     do { } while(0)
 201 #endif
 202
 203 /* br_stp.c */
 204 extern void br_log_state(const struct net_bridge_port *p);
 205 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 206                                            u16 port_no);
 207 extern void br_init_port(struct net_bridge_port *p);
 208 extern void br_become_designated_port(struct net_bridge_port *p);
 209
 210 /* br_stp_if.c */
 211 extern void br_stp_enable_bridge(struct net_bridge *br);
 212 extern void br_stp_disable_bridge(struct net_bridge *br);
 213 extern void br_stp_enable_port(struct net_bridge_port *p);
 214 extern void br_stp_disable_port(struct net_bridge_port *p);
 215 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 216 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 217 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 218                                        u16 newprio);
 219 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 220                                      u8 newprio);
 221 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 222                                  u32 path_cost);
 223 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 224
 225 /* br_stp_bpdu.c */
 226 extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
 227                       struct packet_type *pt, struct net_device *orig_dev);
 228
 229 /* br_stp_timer.c */
 230 extern void br_stp_timer_init(struct net_bridge *br);
 231 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 232 extern unsigned long br_timer_value(const struct timer_list *timer);
 233
 234 /* br.c */
 235 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
 236                                                        unsigned char *addr);
 237 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
 238
 239
 240 /* br_netlink.c */
 241 extern void br_netlink_init(void);
 242 extern void br_netlink_fini(void);
 243 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 244
 245 #ifdef CONFIG_SYSFS
 246 /* br_sysfs_if.c */
 247 extern struct sysfs_ops brport_sysfs_ops;
 248 extern int br_sysfs_addif(struct net_bridge_port *p);
 249
 250 /* br_sysfs_br.c */
 251 extern int br_sysfs_addbr(struct net_device *dev);
 252 extern void br_sysfs_delbr(struct net_device *dev);
 253
 254 #else
 255
 256 #define br_sysfs_addif(p)       (0)
 257 #define br_sysfs_addbr(dev)     (0)
 258 #define br_sysfs_delbr(dev)     do { } while(0)
 259 #endif /* CONFIG_SYSFS */
 260
 261 #endif