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      "2.3"
  30
  31 /* Path to usermode spanning tree program */
  32 #define BR_STP_PROG     "/sbin/bridge-stp"
  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 rcu_head                 rcu;
  86 };
  87
  88 struct net_bridge
  89 {
  90         spinlock_t                      lock;
  91         struct list_head                port_list;
  92         struct net_device               *dev;
  93         struct net_device_stats         statistics;
  94         spinlock_t                      hash_lock;
  95         struct hlist_head               hash[BR_HASH_SIZE];
  96         struct list_head                age_list;
  97         unsigned long                   feature_mask;
  98
  99         /* STP */
 100         bridge_id                       designated_root;
 101         bridge_id                       bridge_id;
 102         u32                             root_path_cost;
 103         unsigned long                   max_age;
 104         unsigned long                   hello_time;
 105         unsigned long                   forward_delay;
 106         unsigned long                   bridge_max_age;
 107         unsigned long                   ageing_time;
 108         unsigned long                   bridge_hello_time;
 109         unsigned long                   bridge_forward_delay;
 110
 111         u8                              group_addr[ETH_ALEN];
 112         u16                             root_port;
 113
 114         enum {
 115                 BR_NO_STP,              /* no spanning tree */
 116                 BR_KERNEL_STP,          /* old STP in kernel */
 117                 BR_USER_STP,            /* new RSTP in userspace */
 118         } stp_enabled;
 119
 120         unsigned char                   topology_change;
 121         unsigned char                   topology_change_detected;
 122
 123         struct timer_list               hello_timer;
 124         struct timer_list               tcn_timer;
 125         struct timer_list               topology_change_timer;
 126         struct timer_list               gc_timer;
 127         struct kobject                  ifobj;
 128 };
 129
 130 extern struct notifier_block br_device_notifier;
 131 extern const u8 br_group_address[ETH_ALEN];
 132
 133 /* called under bridge lock */
 134 static inline int br_is_root_bridge(const struct net_bridge *br)
 135 {
 136         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 137 }
 138
 139 /* br_device.c */
 140 extern void br_dev_setup(struct net_device *dev);
 141 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 142
 143 /* br_fdb.c */
 144 extern int br_fdb_init(void);
 145 extern void br_fdb_fini(void);
 146 extern void br_fdb_flush(struct net_bridge *br);
 147 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 148                               const unsigned char *newaddr);
 149 extern void br_fdb_cleanup(unsigned long arg);
 150 extern void br_fdb_delete_by_port(struct net_bridge *br,
 151                                   const struct net_bridge_port *p, int do_all);
 152 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 153                                                  const unsigned char *addr);
 154 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 155                                                unsigned char *addr);
 156 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 157 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 158                           unsigned long count, unsigned long off);
 159 extern int br_fdb_insert(struct net_bridge *br,
 160                          struct net_bridge_port *source,
 161                          const unsigned char *addr);
 162 extern void br_fdb_update(struct net_bridge *br,
 163                           struct net_bridge_port *source,
 164                           const unsigned char *addr);
 165
 166 /* br_forward.c */
 167 extern void br_deliver(const struct net_bridge_port *to,
 168                 struct sk_buff *skb);
 169 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 170 extern void br_forward(const struct net_bridge_port *to,
 171                 struct sk_buff *skb);
 172 extern int br_forward_finish(struct sk_buff *skb);
 173 extern void br_flood_deliver(struct net_bridge *br,
 174                       struct sk_buff *skb,
 175                       int clone);
 176 extern void br_flood_forward(struct net_bridge *br,
 177                       struct sk_buff *skb,
 178                       int clone);
 179
 180 /* br_if.c */
 181 extern void br_port_carrier_check(struct net_bridge_port *p);
 182 extern int br_add_bridge(const char *name);
 183 extern int br_del_bridge(const char *name);
 184 extern void br_cleanup_bridges(void);
 185 extern int br_add_if(struct net_bridge *br,
 186               struct net_device *dev);
 187 extern int br_del_if(struct net_bridge *br,
 188               struct net_device *dev);
 189 extern int br_min_mtu(const struct net_bridge *br);
 190 extern void br_features_recompute(struct net_bridge *br);
 191
 192 /* br_input.c */
 193 extern int br_handle_frame_finish(struct sk_buff *skb);
 194 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
 195                                        struct sk_buff *skb);
 196
 197 /* br_ioctl.c */
 198 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 199 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
 200
 201 /* br_netfilter.c */
 202 #ifdef CONFIG_BRIDGE_NETFILTER
 203 extern int br_netfilter_init(void);
 204 extern void br_netfilter_fini(void);
 205 #else
 206 #define br_netfilter_init()     (0)
 207 #define br_netfilter_fini()     do { } while(0)
 208 #endif
 209
 210 /* br_stp.c */
 211 extern void br_log_state(const struct net_bridge_port *p);
 212 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 213                                            u16 port_no);
 214 extern void br_init_port(struct net_bridge_port *p);
 215 extern void br_become_designated_port(struct net_bridge_port *p);
 216
 217 /* br_stp_if.c */
 218 extern void br_stp_enable_bridge(struct net_bridge *br);
 219 extern void br_stp_disable_bridge(struct net_bridge *br);
 220 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 221 extern void br_stp_enable_port(struct net_bridge_port *p);
 222 extern void br_stp_disable_port(struct net_bridge_port *p);
 223 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 224 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 225 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 226                                        u16 newprio);
 227 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 228                                      u8 newprio);
 229 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 230                                  u32 path_cost);
 231 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 232
 233 /* br_stp_bpdu.c */
 234 extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
 235                       struct packet_type *pt, struct net_device *orig_dev);
 236
 237 /* br_stp_timer.c */
 238 extern void br_stp_timer_init(struct net_bridge *br);
 239 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 240 extern unsigned long br_timer_value(const struct timer_list *timer);
 241
 242 /* br.c */
 243 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
 244                                                        unsigned char *addr);
 245 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
 246
 247
 248 /* br_netlink.c */
 249 extern int br_netlink_init(void);
 250 extern void br_netlink_fini(void);
 251 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 252
 253 #ifdef CONFIG_SYSFS
 254 /* br_sysfs_if.c */
 255 extern struct sysfs_ops brport_sysfs_ops;
 256 extern int br_sysfs_addif(struct net_bridge_port *p);
 257
 258 /* br_sysfs_br.c */
 259 extern int br_sysfs_addbr(struct net_device *dev);
 260 extern void br_sysfs_delbr(struct net_device *dev);
 261
 262 #else
 263
 264 #define br_sysfs_addif(p)       (0)
 265 #define br_sysfs_addbr(dev)     (0)
 266 #define br_sysfs_delbr(dev)     do { } while(0)
 267 #endif /* CONFIG_SYSFS */
 268
 269 #endif