net/8021q/vlan.h

   1 #ifndef __BEN_VLAN_802_1Q_INC__
   2 #define __BEN_VLAN_802_1Q_INC__
   3
   4 #include <linux/if_vlan.h>
   5
   6
   7 /**
   8  *      struct vlan_priority_tci_mapping - vlan egress priority mappings
   9  *      @priority: skb priority
  10  *      @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
  11  *      @next: pointer to next struct
  12  */
  13 struct vlan_priority_tci_mapping {
  14         u32                                     priority;
  15         u16                                     vlan_qos;
  16         struct vlan_priority_tci_mapping        *next;
  17 };
  18
  19
  20 /**
  21  *      struct vlan_rx_stats - VLAN percpu rx stats
  22  *      @rx_packets: number of received packets
  23  *      @rx_bytes: number of received bytes
  24  *      @multicast: number of received multicast packets
  25  *      @rx_errors: number of errors
  26  */
  27 struct vlan_rx_stats {
  28         unsigned long rx_packets;
  29         unsigned long rx_bytes;
  30         unsigned long multicast;
  31         unsigned long rx_errors;
  32 };
  33
  34 /**
  35  *      struct vlan_dev_info - VLAN private device data
  36  *      @nr_ingress_mappings: number of ingress priority mappings
  37  *      @ingress_priority_map: ingress priority mappings
  38  *      @nr_egress_mappings: number of egress priority mappings
  39  *      @egress_priority_map: hash of egress priority mappings
  40  *      @vlan_id: VLAN identifier
  41  *      @flags: device flags
  42  *      @real_dev: underlying netdevice
  43  *      @real_dev_addr: address of underlying netdevice
  44  *      @dent: proc dir entry
  45  *      @cnt_inc_headroom_on_tx: statistic - number of skb expansions on TX
  46  *      @cnt_encap_on_xmit: statistic - number of skb encapsulations on TX
  47  *      @vlan_rx_stats: ptr to percpu rx stats
  48  */
  49 struct vlan_dev_info {
  50         unsigned int                            nr_ingress_mappings;
  51         u32                                     ingress_priority_map[8];
  52         unsigned int                            nr_egress_mappings;
  53         struct vlan_priority_tci_mapping        *egress_priority_map[16];
  54
  55         u16                                     vlan_id;
  56         u16                                     flags;
  57
  58         struct net_device                       *real_dev;
  59         unsigned char                           real_dev_addr[ETH_ALEN];
  60
  61         struct proc_dir_entry                   *dent;
  62         unsigned long                           cnt_inc_headroom_on_tx;
  63         unsigned long                           cnt_encap_on_xmit;
  64         struct vlan_rx_stats __percpu           *vlan_rx_stats;
  65 };
  66
  67 static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
  68 {
  69         return netdev_priv(dev);
  70 }
  71
  72 #define VLAN_GRP_HASH_SHIFT     5
  73 #define VLAN_GRP_HASH_SIZE      (1 << VLAN_GRP_HASH_SHIFT)
  74 #define VLAN_GRP_HASH_MASK      (VLAN_GRP_HASH_SIZE - 1)
  75
  76 /*  Find a VLAN device by the MAC address of its Ethernet device, and
  77  *  it's VLAN ID.  The default configuration is to have VLAN's scope
  78  *  to be box-wide, so the MAC will be ignored.  The mac will only be
  79  *  looked at if we are configured to have a separate set of VLANs per
  80  *  each MAC addressable interface.  Note that this latter option does
  81  *  NOT follow the spec for VLANs, but may be useful for doing very
  82  *  large quantities of VLAN MUX/DEMUX onto FrameRelay or ATM PVCs.
  83  *
  84  *  Must be invoked with rcu_read_lock (ie preempt disabled)
  85  *  or with RTNL.
  86  */
  87 struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id);
  88
  89 /* found in vlan_dev.c */
  90 int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
  91                   struct packet_type *ptype, struct net_device *orig_dev);
  92 void vlan_dev_set_ingress_priority(const struct net_device *dev,
  93                                    u32 skb_prio, u16 vlan_prio);
  94 int vlan_dev_set_egress_priority(const struct net_device *dev,
  95                                  u32 skb_prio, u16 vlan_prio);
  96 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
  97 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
  98
  99 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
 100 void vlan_setup(struct net_device *dev);
 101 int register_vlan_dev(struct net_device *dev);
 102 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
 103
 104 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
 105                                             u16 vlan_tci)
 106 {
 107         struct vlan_dev_info *vip = vlan_dev_info(dev);
 108
 109         return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
 110 }
 111
 112 #ifdef CONFIG_VLAN_8021Q_GVRP
 113 extern int vlan_gvrp_request_join(const struct net_device *dev);
 114 extern void vlan_gvrp_request_leave(const struct net_device *dev);
 115 extern int vlan_gvrp_init_applicant(struct net_device *dev);
 116 extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
 117 extern int vlan_gvrp_init(void);
 118 extern void vlan_gvrp_uninit(void);
 119 #else
 120 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
 121 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
 122 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
 123 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
 124 static inline int vlan_gvrp_init(void) { return 0; }
 125 static inline void vlan_gvrp_uninit(void) {}
 126 #endif
 127
 128 extern const char vlan_fullname[];
 129 extern const char vlan_version[];
 130 extern int vlan_netlink_init(void);
 131 extern void vlan_netlink_fini(void);
 132
 133 extern struct rtnl_link_ops vlan_link_ops;
 134
 135 static inline int is_vlan_dev(struct net_device *dev)
 136 {
 137         return dev->priv_flags & IFF_802_1Q_VLAN;
 138 }
 139
 140 extern int vlan_net_id;
 141
 142 struct proc_dir_entry;
 143
 144 struct vlan_net {
 145         /* /proc/net/vlan */
 146         struct proc_dir_entry *proc_vlan_dir;
 147         /* /proc/net/vlan/config */
 148         struct proc_dir_entry *proc_vlan_conf;
 149         /* Determines interface naming scheme. */
 150         unsigned short name_type;
 151 };
 152
 153 #endif /* !(__BEN_VLAN_802_1Q_INC__) */