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/if_bridge.h>
  20
  21 #define BR_HASH_BITS 8
  22 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  23
  24 #define BR_HOLD_TIME (1*HZ)
  25
  26 #define BR_PORT_BITS    10
  27 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  28
  29 #define BR_VERSION      "2.2"
  30
  31 typedef struct bridge_id bridge_id;
  32 typedef struct mac_addr mac_addr;
  33 typedef __u16 port_id;
  34
  35 struct bridge_id
  36 {
  37         unsigned char   prio[2];
  38         unsigned char   addr[6];
  39 };
  40
  41 struct mac_addr
  42 {
  43         unsigned char   addr[6];
  44 };
  45
  46 struct net_bridge_fdb_entry
  47 {
  48         struct hlist_node               hlist;
  49         struct net_bridge_port          *dst;
  50
  51         struct rcu_head                 rcu;
  52         atomic_t                        use_count;
  53         unsigned long                   ageing_timer;
  54         mac_addr                        addr;
  55         unsigned char                   is_local;
  56         unsigned char                   is_static;
  57 };
  58
  59 struct net_bridge_port
  60 {
  61         struct net_bridge               *br;
  62         struct net_device               *dev;
  63         struct list_head                list;
  64
  65         /* STP */
  66         u8                              priority;
  67         u8                              state;
  68         u16                             port_no;
  69         unsigned char                   topology_change_ack;
  70         unsigned char                   config_pending;
  71         port_id                         port_id;
  72         port_id                         designated_port;
  73         bridge_id                       designated_root;
  74         bridge_id                       designated_bridge;
  75         u32                             path_cost;
  76         u32                             designated_cost;
  77
  78         struct timer_list               forward_delay_timer;
  79         struct timer_list               hold_timer;
  80         struct timer_list               message_age_timer;
  81         struct kobject                  kobj;
  82         struct rcu_head                 rcu;
  83 };
  84
  85 struct net_bridge
  86 {
  87         spinlock_t                      lock;
  88         struct list_head                port_list;
  89         struct net_device               *dev;
  90         struct net_device_stats         statistics;
  91         spinlock_t                      hash_lock;
  92         struct hlist_head               hash[BR_HASH_SIZE];
  93         struct list_head                age_list;
  94         unsigned long                   feature_mask;
  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         u8                              group_addr[ETH_ALEN];
 109         u16                             root_port;
 110         unsigned char                   stp_enabled;
 111         unsigned char                   topology_change;
 112         unsigned char                   topology_change_detected;
 113
 114         struct timer_list               hello_timer;
 115         struct timer_list               tcn_timer;
 116         struct timer_list               topology_change_timer;
 117         struct timer_list               gc_timer;
 118         struct kobject                  ifobj;
 119 };
 120
 121 extern struct notifier_block br_device_notifier;
 122 extern const u8 br_group_address[ETH_ALEN];
 123
 124 /* called under bridge lock */
 125 static inline int br_is_root_bridge(const struct net_bridge *br)
 126 {
 127         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 128 }
 129
 130
 131 /* br_device.c */
 132 extern void br_dev_setup(struct net_device *dev);
 133 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 134
 135 /* br_fdb.c */
 136 extern void br_fdb_init(void);
 137 extern void br_fdb_fini(void);
 138 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 139                               const unsigned char *newaddr);
 140 extern void br_fdb_cleanup(unsigned long arg);
 141 extern void br_fdb_delete_by_port(struct net_bridge *br,
 142                                   const struct net_bridge_port *p, int do_all);
 143 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 144                                                  const unsigned char *addr);
 145 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 146                                                unsigned char *addr);
 147 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 148 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 149                           unsigned long count, unsigned long off);
 150 extern int br_fdb_insert(struct net_bridge *br,
 151                          struct net_bridge_port *source,
 152                          const unsigned char *addr);
 153 extern void br_fdb_update(struct net_bridge *br,
 154                           struct net_bridge_port *source,
 155                           const unsigned char *addr);
 156
 157 /* br_forward.c */
 158 extern void br_deliver(const struct net_bridge_port *to,
 159                 struct sk_buff *skb);
 160 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 161 extern void br_forward(const struct net_bridge_port *to,
 162                 struct sk_buff *skb);
 163 extern int br_forward_finish(struct sk_buff *skb);
 164 extern void br_flood_deliver(struct net_bridge *br,
 165                       struct sk_buff *skb,
 166                       int clone);
 167 extern void br_flood_forward(struct net_bridge *br,
 168                       struct sk_buff *skb,
 169                       int clone);
 170
 171 /* br_if.c */
 172 extern void br_port_carrier_check(struct net_bridge_port *p);
 173 extern int br_add_bridge(const char *name);
 174 extern int br_del_bridge(const char *name);
 175 extern void br_cleanup_bridges(void);
 176 extern int br_add_if(struct net_bridge *br,
 177               struct net_device *dev);
 178 extern int br_del_if(struct net_bridge *br,
 179               struct net_device *dev);
 180 extern int br_min_mtu(const struct net_bridge *br);
 181 extern void br_features_recompute(struct net_bridge *br);
 182
 183 /* br_input.c */
 184 extern int br_handle_frame_finish(struct sk_buff *skb);
 185 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
 186                                        struct sk_buff *skb);
 187
 188 /* br_ioctl.c */
 189 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 190 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
 191
 192 /* br_netfilter.c */
 193 #ifdef CONFIG_BRIDGE_NETFILTER
 194 extern int br_netfilter_init(void);
 195 extern void br_netfilter_fini(void);
 196 #else
 197 #define br_netfilter_init()     (0)
 198 #define br_netfilter_fini()     do { } while(0)
 199 #endif
 200
 201 /* br_stp.c */
 202 extern void br_log_state(const struct net_bridge_port *p);
 203 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 204                                            u16 port_no);
 205 extern void br_init_port(struct net_bridge_port *p);
 206 extern void br_become_designated_port(struct net_bridge_port *p);
 207
 208 /* br_stp_if.c */
 209 extern void br_stp_enable_bridge(struct net_bridge *br);
 210 extern void br_stp_disable_bridge(struct net_bridge *br);
 211 extern void br_stp_enable_port(struct net_bridge_port *p);
 212 extern void br_stp_disable_port(struct net_bridge_port *p);
 213 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 214 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 215 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 216                                        u16 newprio);
 217 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 218                                      u8 newprio);
 219 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 220                                  u32 path_cost);
 221 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 222
 223 /* br_stp_bpdu.c */
 224 extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
 225                       struct packet_type *pt, struct net_device *orig_dev);
 226
 227 /* br_stp_timer.c */
 228 extern void br_stp_timer_init(struct net_bridge *br);
 229 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 230 extern unsigned long br_timer_value(const struct timer_list *timer);
 231
 232 /* br.c */
 233 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
 234                                                        unsigned char *addr);
 235 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
 236
 237
 238 /* br_netlink.c */
 239 extern int br_netlink_init(void);
 240 extern void br_netlink_fini(void);
 241 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 242
 243 #ifdef CONFIG_SYSFS
 244 /* br_sysfs_if.c */
 245 extern struct sysfs_ops brport_sysfs_ops;
 246 extern int br_sysfs_addif(struct net_bridge_port *p);
 247
 248 /* br_sysfs_br.c */
 249 extern int br_sysfs_addbr(struct net_device *dev);
 250 extern void br_sysfs_delbr(struct net_device *dev);
 251
 252 #else
 253
 254 #define br_sysfs_addif(p)       (0)
 255 #define br_sysfs_addbr(dev)     (0)
 256 #define br_sysfs_delbr(dev)     do { } while(0)
 257 #endif /* CONFIG_SYSFS */
 258
 259 #endif