net/bridge/br_private.h

   1 /*
   2  *      Linux ethernet bridge
   3  *
   4  *      Authors:
   5  *      Lennert Buytenhek               <buytenh@gnu.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifndef _BR_PRIVATE_H
  14 #define _BR_PRIVATE_H
  15
  16 #include <linux/netdevice.h>
  17 #include <linux/if_bridge.h>
  18
  19 #define BR_HASH_BITS 8
  20 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  21
  22 #define BR_HOLD_TIME (1*HZ)
  23
  24 #define BR_PORT_BITS    10
  25 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  26
  27 #define BR_VERSION      "2.3"
  28
  29 /* Path to usermode spanning tree program */
  30 #define BR_STP_PROG     "/sbin/bridge-stp"
  31
  32 typedef struct bridge_id bridge_id;
  33 typedef struct mac_addr mac_addr;
  34 typedef __u16 port_id;
  35
  36 struct bridge_id
  37 {
  38         unsigned char   prio[2];
  39         unsigned char   addr[6];
  40 };
  41
  42 struct mac_addr
  43 {
  44         unsigned char   addr[6];
  45 };
  46
  47 struct net_bridge_fdb_entry
  48 {
  49         struct hlist_node               hlist;
  50         struct net_bridge_port          *dst;
  51
  52         struct rcu_head                 rcu;
  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         spinlock_t                      hash_lock;
  92         struct hlist_head               hash[BR_HASH_SIZE];
  93         struct list_head                age_list;
  94         unsigned long                   feature_mask;
  95         unsigned long                   flags;
  96 #define BR_SET_MAC_ADDR         0x00000001
  97
  98         /* STP */
  99         bridge_id                       designated_root;
 100         bridge_id                       bridge_id;
 101         u32                             root_path_cost;
 102         unsigned long                   max_age;
 103         unsigned long                   hello_time;
 104         unsigned long                   forward_delay;
 105         unsigned long                   bridge_max_age;
 106         unsigned long                   ageing_time;
 107         unsigned long                   bridge_hello_time;
 108         unsigned long                   bridge_forward_delay;
 109
 110         u8                              group_addr[ETH_ALEN];
 111         u16                             root_port;
 112
 113         enum {
 114                 BR_NO_STP,              /* no spanning tree */
 115                 BR_KERNEL_STP,          /* old STP in kernel */
 116                 BR_USER_STP,            /* new RSTP in userspace */
 117         } stp_enabled;
 118
 119         unsigned char                   topology_change;
 120         unsigned char                   topology_change_detected;
 121
 122         struct timer_list               hello_timer;
 123         struct timer_list               tcn_timer;
 124         struct timer_list               topology_change_timer;
 125         struct timer_list               gc_timer;
 126         struct kobject                  *ifobj;
 127 };
 128
 129 extern struct notifier_block br_device_notifier;
 130 extern const u8 br_group_address[ETH_ALEN];
 131
 132 /* called under bridge lock */
 133 static inline int br_is_root_bridge(const struct net_bridge *br)
 134 {
 135         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 136 }
 137
 138 /* br_device.c */
 139 extern void br_dev_setup(struct net_device *dev);
 140 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 141
 142 /* br_fdb.c */
 143 extern int br_fdb_init(void);
 144 extern void br_fdb_fini(void);
 145 extern void br_fdb_flush(struct net_bridge *br);
 146 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 147                               const unsigned char *newaddr);
 148 extern void br_fdb_cleanup(unsigned long arg);
 149 extern void br_fdb_delete_by_port(struct net_bridge *br,
 150                                   const struct net_bridge_port *p, int do_all);
 151 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 152                                                  const unsigned char *addr);
 153 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
 154                                                unsigned char *addr);
 155 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
 156 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 157                           unsigned long count, unsigned long off);
 158 extern int br_fdb_insert(struct net_bridge *br,
 159                          struct net_bridge_port *source,
 160                          const unsigned char *addr);
 161 extern void br_fdb_update(struct net_bridge *br,
 162                           struct net_bridge_port *source,
 163                           const unsigned char *addr);
 164
 165 /* br_forward.c */
 166 extern void br_deliver(const struct net_bridge_port *to,
 167                 struct sk_buff *skb);
 168 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 169 extern void br_forward(const struct net_bridge_port *to,
 170                 struct sk_buff *skb);
 171 extern int br_forward_finish(struct sk_buff *skb);
 172 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
 173 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb);
 174
 175 /* br_if.c */
 176 extern void br_port_carrier_check(struct net_bridge_port *p);
 177 extern int br_add_bridge(const char *name);
 178 extern int br_del_bridge(const char *name);
 179 extern void br_cleanup_bridges(void);
 180 extern int br_add_if(struct net_bridge *br,
 181               struct net_device *dev);
 182 extern int br_del_if(struct net_bridge *br,
 183               struct net_device *dev);
 184 extern int br_min_mtu(const struct net_bridge *br);
 185 extern void br_features_recompute(struct net_bridge *br);
 186
 187 /* br_input.c */
 188 extern int br_handle_frame_finish(struct sk_buff *skb);
 189 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
 190                                        struct sk_buff *skb);
 191
 192 /* br_ioctl.c */
 193 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 194 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 195
 196 /* br_netfilter.c */
 197 #ifdef CONFIG_BRIDGE_NETFILTER
 198 extern int br_netfilter_init(void);
 199 extern void br_netfilter_fini(void);
 200 #else
 201 #define br_netfilter_init()     (0)
 202 #define br_netfilter_fini()     do { } while(0)
 203 #endif
 204
 205 /* br_stp.c */
 206 extern void br_log_state(const struct net_bridge_port *p);
 207 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 208                                            u16 port_no);
 209 extern void br_init_port(struct net_bridge_port *p);
 210 extern void br_become_designated_port(struct net_bridge_port *p);
 211
 212 /* br_stp_if.c */
 213 extern void br_stp_enable_bridge(struct net_bridge *br);
 214 extern void br_stp_disable_bridge(struct net_bridge *br);
 215 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 216 extern void br_stp_enable_port(struct net_bridge_port *p);
 217 extern void br_stp_disable_port(struct net_bridge_port *p);
 218 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 219 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 220 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 221                                        u16 newprio);
 222 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 223                                      u8 newprio);
 224 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 225                                  u32 path_cost);
 226 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 227
 228 /* br_stp_bpdu.c */
 229 struct stp_proto;
 230 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 231                        struct net_device *dev);
 232
 233 /* br_stp_timer.c */
 234 extern void br_stp_timer_init(struct net_bridge *br);
 235 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 236 extern unsigned long br_timer_value(const struct timer_list *timer);
 237
 238 /* br.c */
 239 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
 240                                                        unsigned char *addr);
 241 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
 242
 243
 244 /* br_netlink.c */
 245 extern int br_netlink_init(void);
 246 extern void br_netlink_fini(void);
 247 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 248
 249 #ifdef CONFIG_SYSFS
 250 /* br_sysfs_if.c */
 251 extern struct sysfs_ops brport_sysfs_ops;
 252 extern int br_sysfs_addif(struct net_bridge_port *p);
 253
 254 /* br_sysfs_br.c */
 255 extern int br_sysfs_addbr(struct net_device *dev);
 256 extern void br_sysfs_delbr(struct net_device *dev);
 257
 258 #else
 259
 260 #define br_sysfs_addif(p)       (0)
 261 #define br_sysfs_addbr(dev)     (0)
 262 #define br_sysfs_delbr(dev)     do { } while(0)
 263 #endif /* CONFIG_SYSFS */
 264
 265 #endif