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 #include <net/route.h>
  19
  20 #define BR_HASH_BITS 8
  21 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  22
  23 #define BR_HOLD_TIME (1*HZ)
  24
  25 #define BR_PORT_BITS    10
  26 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  27
  28 #define BR_VERSION      "2.3"
  29
  30 /* Path to usermode spanning tree program */
  31 #define BR_STP_PROG     "/sbin/bridge-stp"
  32
  33 typedef struct bridge_id bridge_id;
  34 typedef struct mac_addr mac_addr;
  35 typedef __u16 port_id;
  36
  37 struct bridge_id
  38 {
  39         unsigned char   prio[2];
  40         unsigned char   addr[6];
  41 };
  42
  43 struct mac_addr
  44 {
  45         unsigned char   addr[6];
  46 };
  47
  48 struct net_bridge_fdb_entry
  49 {
  50         struct hlist_node               hlist;
  51         struct net_bridge_port          *dst;
  52
  53         struct rcu_head                 rcu;
  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 #ifdef CONFIG_BRIDGE_NETFILTER
  96         struct rtable                   fake_rtable;
  97 #endif
  98         unsigned long                   flags;
  99 #define BR_SET_MAC_ADDR         0x00000001
 100
 101         /* STP */
 102         bridge_id                       designated_root;
 103         bridge_id                       bridge_id;
 104         u32                             root_path_cost;
 105         unsigned long                   max_age;
 106         unsigned long                   hello_time;
 107         unsigned long                   forward_delay;
 108         unsigned long                   bridge_max_age;
 109         unsigned long                   ageing_time;
 110         unsigned long                   bridge_hello_time;
 111         unsigned long                   bridge_forward_delay;
 112
 113         u8                              group_addr[ETH_ALEN];
 114         u16                             root_port;
 115
 116         enum {
 117                 BR_NO_STP,              /* no spanning tree */
 118                 BR_KERNEL_STP,          /* old STP in kernel */
 119                 BR_USER_STP,            /* new RSTP in userspace */
 120         } stp_enabled;
 121
 122         unsigned char                   topology_change;
 123         unsigned char                   topology_change_detected;
 124
 125         struct timer_list               hello_timer;
 126         struct timer_list               tcn_timer;
 127         struct timer_list               topology_change_timer;
 128         struct timer_list               gc_timer;
 129         struct kobject                  *ifobj;
 130 };
 131
 132 extern struct notifier_block br_device_notifier;
 133 extern const u8 br_group_address[ETH_ALEN];
 134
 135 /* called under bridge lock */
 136 static inline int br_is_root_bridge(const struct net_bridge *br)
 137 {
 138         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 139 }
 140
 141 /* br_device.c */
 142 extern void br_dev_setup(struct net_device *dev);
 143 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 144
 145 /* br_fdb.c */
 146 extern int br_fdb_init(void);
 147 extern void br_fdb_fini(void);
 148 extern void br_fdb_flush(struct net_bridge *br);
 149 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 150                               const unsigned char *newaddr);
 151 extern void br_fdb_cleanup(unsigned long arg);
 152 extern void br_fdb_delete_by_port(struct net_bridge *br,
 153                                   const struct net_bridge_port *p, int do_all);
 154 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 155                                                  const unsigned char *addr);
 156 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 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, struct sk_buff *skb);
 174 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb);
 175
 176 /* br_if.c */
 177 extern void br_port_carrier_check(struct net_bridge_port *p);
 178 extern int br_add_bridge(struct net *net, const char *name);
 179 extern int br_del_bridge(struct net *net, const char *name);
 180 extern void br_net_exit(struct net *net);
 181 extern int br_add_if(struct net_bridge *br,
 182               struct net_device *dev);
 183 extern int br_del_if(struct net_bridge *br,
 184               struct net_device *dev);
 185 extern int br_min_mtu(const struct net_bridge *br);
 186 extern void br_features_recompute(struct net_bridge *br);
 187
 188 /* br_input.c */
 189 extern int br_handle_frame_finish(struct sk_buff *skb);
 190 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
 191                                        struct sk_buff *skb);
 192
 193 /* br_ioctl.c */
 194 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 195 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 196
 197 /* br_netfilter.c */
 198 #ifdef CONFIG_BRIDGE_NETFILTER
 199 extern int br_netfilter_init(void);
 200 extern void br_netfilter_fini(void);
 201 extern void br_netfilter_rtable_init(struct net_bridge *);
 202 #else
 203 #define br_netfilter_init()     (0)
 204 #define br_netfilter_fini()     do { } while(0)
 205 #define br_netfilter_rtable_init(x)
 206 #endif
 207
 208 /* br_stp.c */
 209 extern void br_log_state(const struct net_bridge_port *p);
 210 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 211                                            u16 port_no);
 212 extern void br_init_port(struct net_bridge_port *p);
 213 extern void br_become_designated_port(struct net_bridge_port *p);
 214
 215 /* br_stp_if.c */
 216 extern void br_stp_enable_bridge(struct net_bridge *br);
 217 extern void br_stp_disable_bridge(struct net_bridge *br);
 218 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 219 extern void br_stp_enable_port(struct net_bridge_port *p);
 220 extern void br_stp_disable_port(struct net_bridge_port *p);
 221 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
 222 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 223 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 224                                        u16 newprio);
 225 extern void br_stp_set_port_priority(struct net_bridge_port *p,
 226                                      u8 newprio);
 227 extern void br_stp_set_path_cost(struct net_bridge_port *p,
 228                                  u32 path_cost);
 229 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 230
 231 /* br_stp_bpdu.c */
 232 struct stp_proto;
 233 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 234                        struct net_device *dev);
 235
 236 /* br_stp_timer.c */
 237 extern void br_stp_timer_init(struct net_bridge *br);
 238 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 239 extern unsigned long br_timer_value(const struct timer_list *timer);
 240
 241 /* br.c */
 242 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
 243 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 244 #endif
 245
 246 /* br_netlink.c */
 247 extern int br_netlink_init(void);
 248 extern void br_netlink_fini(void);
 249 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 250
 251 #ifdef CONFIG_SYSFS
 252 /* br_sysfs_if.c */
 253 extern struct sysfs_ops brport_sysfs_ops;
 254 extern int br_sysfs_addif(struct net_bridge_port *p);
 255
 256 /* br_sysfs_br.c */
 257 extern int br_sysfs_addbr(struct net_device *dev);
 258 extern void br_sysfs_delbr(struct net_device *dev);
 259
 260 #else
 261
 262 #define br_sysfs_addif(p)       (0)
 263 #define br_sysfs_addbr(dev)     (0)
 264 #define br_sysfs_delbr(dev)     do { } while(0)
 265 #endif /* CONFIG_SYSFS */
 266
 267 #endif